What's the difference between kW and kVA?

kW (kilowatts) is the real power your appliances actually consume. kVA (kilovolt-amperes) is the apparent power the grid supplies, including reactive power that motors and compressors draw but never quite use productively. For purely resistive loads (lights, heaters) kW equals kVA. For inductive loads (ACs, motors, fridges) kW is roughly 0.8 times kVA. Pakistani grid connections are usually specified in kVA. When sizing solar, match the kW capacity of panels to your kW consumption — full kVA matching is not required for grid-tied setups.

Grid-tied vs hybrid vs off-grid — which is best?

Grid-tied (no battery) is the cheapest and most efficient — you sell daytime surplus to the grid via net metering and buy at night, but you lose solar during load-shedding. Hybrid adds a battery for essential loads during outages — about 20 to 30 percent more cost upfront, plus ~7 percent efficiency loss from the battery cycle. Off-grid is fully independent with much larger battery banks — most expensive, suited to areas with no grid or wildly unreliable grid. For urban Pakistan with 8 to 12 hours of daily load-shedding, hybrid is the sweet spot — solar generation continues to power your fans and lights when the grid is down.

How many years do solar panels last?

Modern monocrystalline panels carry 25 to 30 year performance warranties guaranteeing at least 80 percent of rated output at year 25. Many panels keep generating useful power well past 35 years — the technology is mature and durable. Inverters typically need replacement at 10 to 12 years and cost roughly 10 percent of your original system price at that point. Batteries are the shortest-lived component: lithium 8 to 12 years, lead-acid only 3 to 5 years. Budget for the inverter replacement at year 10 in your payback math.

What does 'peak sun hours' mean?

Peak sun hours is the equivalent number of hours per day at 1,000 watts per square meter irradiance — the standard test condition panels are rated at. It is not the same as 'daylight hours' — a panel produces much less in early morning and late evening than at noon, so the actual generation is spread across more hours than the peak figure. Pakistan averages roughly 5 peak sun hours: Karachi 5.2, Lahore 5.1, Multan 5.5 (best in the country), Islamabad 4.8 (cloudier). Your actual generation equals system size in kW times peak sun hours times system efficiency.

Not for pure grid-tied setups — excess daytime solar feeds the grid via net metering and you draw at night. Add a battery only if you want backup during load-shedding (the main reason most Pakistani homes go hybrid), if net metering is not available in your area, or if you want to maximise self-consumption. Lithium batteries have come down sharply in price since 2022 but still add 20 to 30 percent to upfront cost. Honest take: for K-Electric customers in Karachi with 6 to 10 hours of daily load-shedding, the battery is worth it just for not sitting in the dark.

What maintenance do solar panels need?

Very little, which is one of the reasons solar pays back so well. Panels need cleaning every 3 to 6 months (more often in dusty southern Punjab and Sindh) — just water and a soft brush, no chemicals required. Inverter cooling fans may need occasional dust cleaning. Battery water top-up for flooded lead-acid monthly; lithium is maintenance-free. Annual electrical inspection by a qualified technician is wise but not legally required. No moving parts outside the inverter means failure rates are extremely low — most failures over 25 years are inverter-related.

Will net metering save me money?

Yes, significantly. Net metering lets you sell surplus daytime solar generation back to the grid at a buyback rate, offsetting the electricity you buy at night. In Pakistan, net metering is available at up to 1:1 credit in most regions — meaning every kWh you export earns you a kWh of free import. Your monthly bill becomes 'net' equals consumption minus generation. In a well-sized system, some months can come out near zero or even credit-positive (the credit carries forward to the next month). Apply for the net-metering meter through your local distribution company — the paperwork takes 2 to 6 months.

Which panel brand is best for Pakistan?

Stick with Tier-1 manufacturers from the Bloomberg Tier-1 list: Longi, JA Solar, Canadian Solar, Jinko, Trina. They carry 25-year warranties that actually hold up if you ever need to claim. Avoid the ultra-cheap unbranded panels flooding Karachi's electronics markets — the warranty paper is often worthless and the degradation can be 2 to 3 times faster than Tier-1, which destroys the payback math. The 10 to 15 percent extra cost for Tier-1 panels pays back many times over across the 25-year system life.

Premium Converters

Solar Panel Calculator

Construction

Calculate panels needed, system cost, monthly generation, and payback period for a solar setup.

Construction

Solar Panel Calculator

Generated on May 23, 2026

Your Energy Requirement

of panel capacity

Tip: "Connection size" refers to your peak AC load. Typical Pakistani homes run 3–10 kW; commercial setups 15+ kW.

Solar Panel Selection

Custom:

System Type

Panel Pricing

Price per Watt (PKR)

PKR

Market rate in Pakistan (2024): typically PKR 45–65/watt for Tier-1 panels.

Location, Savings & InstallationOptional

Peak Sun Hours / day

Pakistan avg: 5. Karachi/Lahore ~5.2; Multan ~5.5; Islamabad ~4.8.

Install Overhead (%)

Inverter + structure + wiring + labor. Typically 35–50% of panel cost.

Your Electricity Rate (per kWh)

PKR

Pakistan 2024 residential slab rates: ~PKR 20–60/unit depending on consumption. Commercial ~PKR 40–55.

Save / share— download or share to WhatsApp, Facebook & more

Premium Converters

Solar Panel System

15 panels (585 W each) · 8.78 kW installed · PKR 675,675

Generated

5/23/2026

Panels Needed

15 panels

585 W each · 8,775 W installed · 8.78 kW

Daily Gen

37.3 kWh

Monthly Gen

1,135 kWh

Annual Gen

13,622 kWh

System Cost

PKR 675,675

Monthly Savings

PKR 56,761

Annual Savings

PKR 681,077

Payback Period

1.0 years

Oversized for losses: 8,235 W of panels installed for your 7,000 W target (system type Grid-tied — ~85% efficiency).

Payback Timeline

Cumulative savings (green) crosses system cost (red dashed) at the payback point. Everything above the red line after that is pure profit.

Monthly Generation (seasonal)

Estimated monthly output accounting for seasonal sun variation in Pakistan. Summer months generate ~20% more than winter.

Cost Breakdown

10-Year Value

Total System CostPKR 675,675

Savings Year 1PKR 681,077

Savings (10 years)PKR 6,810,771

Net 10-year ProfitPKR 6,135,096

Most quality panels are warrantied for 25 years of output. After payback, everything is profit. Rising electricity tariffs make real savings even higher.

Step-by-step calculation

Formula

Panels = Ceil(System W ÷ Efficiency ÷ Panel W). Daily Gen = Installed kW × Sun Hours × Efficiency. Payback = Total Cost ÷ Annual Savings.

1Target system size: 7 kW = 7,000 W AC output
2System type: Grid-tied (no battery) → overall efficiency 85%
3Required panel capacity = 7,000 ÷ 0.85 = 8,235 W DC
4Chosen panel: 585 W each
5Panels needed = ⌈8,235 ÷ 585⌉ = 15 panels
6Total installed = 15 × 585 = 8,775 W (8.78 kW)
7━ Generation ━
8Daily kWh = 8.78 × 5 hrs × 0.85 = 37.29 kWh
9Monthly ≈ 37.29 × 30.44 = 1,135 kWh
10Annual ≈ 37.29 × 365.25 = 13,622 kWh
11━ Cost ━
12Panel cost = 8,775 W × PKR 55 = PKR 482,625
13Installation overhead (40%) = PKR 193,050
14Total system cost = PKR 675,675
15━ Savings & Payback ━
16Monthly savings = 1,135 kWh × PKR 50/kWh = PKR 56,761
17Annual savings = PKR 681,077
18Payback period = PKR 675,675 ÷ PKR 681,077/yr = 1.0 years

Quick Answer

Calculate panels needed, system cost, monthly generation, and payback period for a solar setup.

Overview — Solar Panel Calculator

Construction

A solar panel calculator helps you size and cost a photovoltaic system for your home or business. Enter your power requirement (e.

Formula

Panels Needed = Ceil(Target System Watts ÷ (Panel Watt × System Efficiency)).  Daily Generation (kWh) = Installed kW × Peak Sun Hours × Efficiency.  Payback Years = Total System Cost ÷ Annual Savings.

Pakistan averages ~5 peak sun hours/day — a 5 kW solar system generates ~750 kWh/month.

A typical 10 Marla home in Pakistan uses 800–1,200 kWh/month in summer (AC) — needs 8–10 kW system.

Solar payback in Pakistan averages 3–5 years due to high tariffs and generous net metering.

By Muhammad Salman SaleemUpdated: May 23, 2026MethodologyFree, no sign-upRuns in your browser — your data stays private

From the editors — what to know before you start

If you have looked at your last K-Electric or LESCO summer bill and thought 'this cannot continue', you are exactly the person solar economics have transformed for in Pakistan over the last three years. Post-2024 NEPRA tariff increases plus generous net-metering rules have collapsed residential solar payback periods from the old 4 to 5 years to roughly 2 to 3 years. This calculator works backwards from your target system size (or your existing grid connection — 5 kW, 7 kW, 10 kW are the common ones) and the panel wattage you can buy locally (585W, 555W, 545W are the current sweet spots) to tell you exactly how many panels, total installed kW, daily and monthly kWh generation, system cost in PKR, and payback period in years. The math factors in real-world losses — inverter inefficiency, dust on panels, temperature derating, cabling — using an honest 85 percent efficiency factor for grid-tied and 78 percent for hybrid. Honest take: do not skimp on the panels. Tier-1 brands (Longi, JA Solar, Canadian Solar, Jinko, Trina) with 25-year warranties cost 10 to 15 percent more than the unbranded Karachi market panels, but they actually hold the warranty and degrade much slower. Pakistan averages 5 peak sun hours daily (Multan gets 5.5, Islamabad 4.8) — your local figure drives generation, and your local tariff drives savings. Run both numbers through here and the payback case is usually unambiguous.

Pro tips most people learn the hard way

Pakistani residential solar paybacks have collapsed from 4 to 5 years (pre-2024) to roughly 2 to 3 years thanks to NEPRA tariff increases and 1:1 net metering. The math has flipped from 'investment for the next decade' to 'pays for itself before your kids finish school' — earlier adopters locked in even better economics.
Tier-1 panel brands (Longi, JA Solar, Canadian Solar, Jinko, Trina) cost 10 to 15 percent more than the unbranded Karachi market alternatives but they actually hold the 25-year warranty and degrade much slower. The premium pays back many times over across the system life. Cheap panels are the most expensive choice in year 8.
Hybrid systems (with battery backup) are the sweet spot for urban Pakistan because they keep generating during the 6 to 12 hours of daily load-shedding most cities still face. Pure grid-tied is cheaper but goes dark with the grid. Pure off-grid is expensive and only worth it if your area has no reliable grid.
Apply for the net-metering meter through your local distribution company immediately after installation — the paperwork takes 2 to 6 months and until it is done, your exported solar is just being given away free. Net metering at 1:1 credit transforms the payback math; without it, you lose 40 to 50 percent of the system's financial value.
Budget for inverter replacement at year 10 to 12 (about 10 percent of original system cost). Panels themselves last 25 to 35 years. Lithium batteries last 8 to 12 years. Lead-acid batteries only 3 to 5 years — almost always not worth the lower upfront cost given how soon you replace them.

?What is the Solar Panel Calculator?

A solar panel calculator helps you size and cost a photovoltaic system for your home or business. Enter your power requirement (e.g. a 5 kW, 7 kW, or 10 kW connection), pick a panel wattage from common market sizes (585W, 555W, 545W and others), and the calculator tells you exactly how many panels you need, total installed wattage, expected daily/monthly/annual electricity generation, full system cost (including inverter and installation), and how long until the system pays for itself through reduced electricity bills. It is especially valuable in Pakistan and South Asia where rising unit tariffs and reliable sunshine have made solar a strong investment. The tool accounts for real-world losses — inverter inefficiency, cabling losses, dust, shading, and temperature derating — so the recommended panel count is realistic rather than theoretical.

The Formula

Panels Needed = Ceil(Target System Watts ÷ (Panel Watt × System Efficiency)). Daily Generation (kWh) = Installed kW × Peak Sun Hours × Efficiency. Payback Years = Total System Cost ÷ Annual Savings.

Panel capacity is over-provisioned so the AC output still matches your target connection after system losses. The 'efficiency' factor (~85% grid-tied, ~78% hybrid, ~72% off-grid) bundles inverter efficiency, cable losses, dust/soiling, and temperature derating. 'Peak sun hours' is the equivalent number of hours per day at standard 1000 W/m² irradiance — roughly 5 hours average across Pakistan, ranging from 4.8 in Islamabad to 5.5 in Multan. Monthly generation multiplies daily by 30.44 (average calendar month); annual by 365.25 to include leap days. Payback is the simple undiscounted period — real payback is faster because electricity tariffs tend to rise over time.

Solar System Sizing — By Monthly Electricity Usage (Pakistan)

Recommended solar system size for different monthly kWh consumption, assuming 5 peak sun hours/day and typical Pakistani tariffs.

Monthly kWh	Typical Bill	System Size	Panel Count (550W)	Approx. Cost (PKR)
200 kWh	~5,000 PKR	2 kW	4	400,000–500,000
400 kWh	~15,000 PKR	3 kW	6	600,000–800,000
600 kWh	~25,000 PKR	5 kW	10	900,000–1,200,000
800 kWh	~40,000 PKR	7 kW	13	1,300,000–1,700,000
1,000 kWh	~55,000 PKR	8 kW	15	1,500,000–2,000,000
1,500 kWh	~90,000 PKR	12 kW	22	2,200,000–3,000,000

Put It in Perspective

Pakistan averages ~5 peak sun hours/day — a 5 kW solar system generates ~750 kWh/month.

A typical 10 Marla home in Pakistan uses 800–1,200 kWh/month in summer (AC) — needs 8–10 kW system.

Solar payback in Pakistan averages 3–5 years due to high tariffs and generous net metering.

Tier-1 panels carry 25-year warranties; pair with a quality inverter for a 25-year reliable system.

Practical Examples

A typical Pakistani home with a 7 kW connection using 585W panels needs 15 panels (8,775 W total), generates ~35 kWh/day, costs around PKR 1,400,000–1,500,000 all-in, saves ~PKR 52,500/month at PKR 50/kWh, and pays back in ~2.3 years.

A 10 kW commercial setup using 555W panels needs 22 panels (12,210 W), generates ~50 kWh/day, and typically costs PKR 2.0–2.2 million including inverter and installation.

A small 3 kW home system using 450W panels needs 8 panels (3,600 W) and generates ~14 kWh/day — enough to offset most daytime consumption in a small household.

Switching from 450W to 585W panels for the same 7 kW system reduces panel count from 20 to 15 — fewer roof-mount points, shorter wiring runs, and typically lower total cost despite higher per-panel price.

A commercial 50 kW rooftop setup using 620W panels needs ~95 panels, generates ~250 kWh/day, and for a factory with PKR 55/kWh tariff saves ~PKR 420,000/month — payback in under 2 years with good net-metering.

Post-NEPRA 2024 tariff rises, payback periods for most residential solar setups in Pakistan have shortened from 4–5 years to 2–3 years — earlier adopters locked in even better economics.

Frequently Asked Questions

Pull out your highest electricity bill of the year — that is usually a July or August bill with the AC running constantly. Divide monthly kWh consumption by roughly 150 to get an approximate kW system size. Quick reference: a small home with 1 to 2 ACs needs about 5 kW, a typical 3-bedroom home wants 7 to 10 kW, a large house 10 to 15 kW, commercial sites 15-plus. Easier shortcut: match your existing grid connection (3 kW, 5 kW, 7 kW) as the safe default. You will never go wrong sizing the solar to match what K-Electric or LESCO already approved.

Popular Conversions

Jump to a ready-made conversion — useful for quick reference and sharing:

Browse all Construction

Tile Calculator

Work out tile quantity for floors, walls, showers and backsplashes in sq ft or sq m, with adjustable wastage allowance for straight, diagonal and herringbone layouts.

Paint Calculator

Estimate paint in litres or gallons from room dimensions, coats and coverage, subtracting doors and windows — works for interior emulsion and exterior weather coats.

Concrete Calculator

Compute cement bags, sand and aggregate in m3 for slabs, footings, beams and columns using M15, M20 or M25 mix ratios with the 1.54 dry-volume factor.

Brick Calculator

Estimate bricks, mortar, cement bags and sand for a single wall or a 4-wall plot. Supports 22 brick & block standards, ft+in or metric input, openings deduction, and 2D + 3D visualizations.

Square Footage Calculator

Calculate area from length and width and convert square feet to square metres, square yards, acres, Marla and Kanal for property, flooring and material estimates.

Plot Area Calculator (4-Sided)

Calculate plot area from four sides (North, South, East, West) in Marla, Kanal, and Acres.

Plot Area Calculator (3-Sided / Triangular)

Calculate the exact area of a triangular plot from three side lengths using Heron's formula. Marla, Kanal, Acre.

Plot Area Calculator (5-Sided / Pentagonal)

Estimate the area of a 5-sided pentagonal plot from its five side lengths. Cyclic-polygon method.

Browse all Construction calculators & converters

See every tool in this category, plus FAQs and category-specific guides.

Browse other categories

Islamic9 Financial14 Gold & Silver8 Health25 Unit19 Date & Time9 Math21 Utility20 Fun12

Premium Converters

Solar Panel Calculator

Construction

Calculate panels needed, system cost, monthly generation, and payback period for a solar setup.

Construction

Solar Panel Calculator

Generated on May 23, 2026

Your Energy Requirement

of panel capacity

Tip: "Connection size" refers to your peak AC load. Typical Pakistani homes run 3–10 kW; commercial setups 15+ kW.

Solar Panel Selection

Custom:

System Type

Panel Pricing

Price per Watt (PKR)

PKR

Market rate in Pakistan (2024): typically PKR 45–65/watt for Tier-1 panels.

Location, Savings & InstallationOptional

Peak Sun Hours / day

Pakistan avg: 5. Karachi/Lahore ~5.2; Multan ~5.5; Islamabad ~4.8.

Install Overhead (%)

Inverter + structure + wiring + labor. Typically 35–50% of panel cost.

Your Electricity Rate (per kWh)

PKR

Pakistan 2024 residential slab rates: ~PKR 20–60/unit depending on consumption. Commercial ~PKR 40–55.

Save / share— download or share to WhatsApp, Facebook & more

Premium Converters

Solar Panel System

15 panels (585 W each) · 8.78 kW installed · PKR 675,675

Generated

5/23/2026

Panels Needed

15 panels

585 W each · 8,775 W installed · 8.78 kW

Daily Gen

37.3 kWh

Monthly Gen

1,135 kWh

Annual Gen

13,622 kWh

System Cost

PKR 675,675

Monthly Savings

PKR 56,761

Annual Savings

PKR 681,077

Payback Period

1.0 years

Oversized for losses: 8,235 W of panels installed for your 7,000 W target (system type Grid-tied — ~85% efficiency).

Payback Timeline

Cumulative savings (green) crosses system cost (red dashed) at the payback point. Everything above the red line after that is pure profit.

Monthly Generation (seasonal)

Estimated monthly output accounting for seasonal sun variation in Pakistan. Summer months generate ~20% more than winter.

Cost Breakdown

10-Year Value

Total System CostPKR 675,675

Savings Year 1PKR 681,077

Savings (10 years)PKR 6,810,771

Net 10-year ProfitPKR 6,135,096

Most quality panels are warrantied for 25 years of output. After payback, everything is profit. Rising electricity tariffs make real savings even higher.

Step-by-step calculation

Formula

Panels = Ceil(System W ÷ Efficiency ÷ Panel W). Daily Gen = Installed kW × Sun Hours × Efficiency. Payback = Total Cost ÷ Annual Savings.

1Target system size: 7 kW = 7,000 W AC output
2System type: Grid-tied (no battery) → overall efficiency 85%
3Required panel capacity = 7,000 ÷ 0.85 = 8,235 W DC
4Chosen panel: 585 W each
5Panels needed = ⌈8,235 ÷ 585⌉ = 15 panels
6Total installed = 15 × 585 = 8,775 W (8.78 kW)
7━ Generation ━
8Daily kWh = 8.78 × 5 hrs × 0.85 = 37.29 kWh
9Monthly ≈ 37.29 × 30.44 = 1,135 kWh
10Annual ≈ 37.29 × 365.25 = 13,622 kWh
11━ Cost ━
12Panel cost = 8,775 W × PKR 55 = PKR 482,625
13Installation overhead (40%) = PKR 193,050
14Total system cost = PKR 675,675
15━ Savings & Payback ━
16Monthly savings = 1,135 kWh × PKR 50/kWh = PKR 56,761
17Annual savings = PKR 681,077
18Payback period = PKR 675,675 ÷ PKR 681,077/yr = 1.0 years

Quick Answer

Calculate panels needed, system cost, monthly generation, and payback period for a solar setup.

Overview — Solar Panel Calculator

Construction

A solar panel calculator helps you size and cost a photovoltaic system for your home or business. Enter your power requirement (e.

Formula

Panels Needed = Ceil(Target System Watts ÷ (Panel Watt × System Efficiency)).  Daily Generation (kWh) = Installed kW × Peak Sun Hours × Efficiency.  Payback Years = Total System Cost ÷ Annual Savings.

Pakistan averages ~5 peak sun hours/day — a 5 kW solar system generates ~750 kWh/month.

A typical 10 Marla home in Pakistan uses 800–1,200 kWh/month in summer (AC) — needs 8–10 kW system.

Solar payback in Pakistan averages 3–5 years due to high tariffs and generous net metering.

By Muhammad Salman SaleemUpdated: May 23, 2026MethodologyFree, no sign-upRuns in your browser — your data stays private

From the editors — what to know before you start

Pro tips most people learn the hard way

Pakistani residential solar paybacks have collapsed from 4 to 5 years (pre-2024) to roughly 2 to 3 years thanks to NEPRA tariff increases and 1:1 net metering. The math has flipped from 'investment for the next decade' to 'pays for itself before your kids finish school' — earlier adopters locked in even better economics.
Tier-1 panel brands (Longi, JA Solar, Canadian Solar, Jinko, Trina) cost 10 to 15 percent more than the unbranded Karachi market alternatives but they actually hold the 25-year warranty and degrade much slower. The premium pays back many times over across the system life. Cheap panels are the most expensive choice in year 8.
Hybrid systems (with battery backup) are the sweet spot for urban Pakistan because they keep generating during the 6 to 12 hours of daily load-shedding most cities still face. Pure grid-tied is cheaper but goes dark with the grid. Pure off-grid is expensive and only worth it if your area has no reliable grid.
Apply for the net-metering meter through your local distribution company immediately after installation — the paperwork takes 2 to 6 months and until it is done, your exported solar is just being given away free. Net metering at 1:1 credit transforms the payback math; without it, you lose 40 to 50 percent of the system's financial value.
Budget for inverter replacement at year 10 to 12 (about 10 percent of original system cost). Panels themselves last 25 to 35 years. Lithium batteries last 8 to 12 years. Lead-acid batteries only 3 to 5 years — almost always not worth the lower upfront cost given how soon you replace them.

?What is the Solar Panel Calculator?

The Formula

Solar System Sizing — By Monthly Electricity Usage (Pakistan)

Recommended solar system size for different monthly kWh consumption, assuming 5 peak sun hours/day and typical Pakistani tariffs.

Monthly kWh	Typical Bill	System Size	Panel Count (550W)	Approx. Cost (PKR)
200 kWh	~5,000 PKR	2 kW	4	400,000–500,000
400 kWh	~15,000 PKR	3 kW	6	600,000–800,000
600 kWh	~25,000 PKR	5 kW	10	900,000–1,200,000
800 kWh	~40,000 PKR	7 kW	13	1,300,000–1,700,000
1,000 kWh	~55,000 PKR	8 kW	15	1,500,000–2,000,000
1,500 kWh	~90,000 PKR	12 kW	22	2,200,000–3,000,000

Put It in Perspective

Pakistan averages ~5 peak sun hours/day — a 5 kW solar system generates ~750 kWh/month.

A typical 10 Marla home in Pakistan uses 800–1,200 kWh/month in summer (AC) — needs 8–10 kW system.

Solar payback in Pakistan averages 3–5 years due to high tariffs and generous net metering.

Tier-1 panels carry 25-year warranties; pair with a quality inverter for a 25-year reliable system.

Practical Examples

A 10 kW commercial setup using 555W panels needs 22 panels (12,210 W), generates ~50 kWh/day, and typically costs PKR 2.0–2.2 million including inverter and installation.

A small 3 kW home system using 450W panels needs 8 panels (3,600 W) and generates ~14 kWh/day — enough to offset most daytime consumption in a small household.

Post-NEPRA 2024 tariff rises, payback periods for most residential solar setups in Pakistan have shortened from 4–5 years to 2–3 years — earlier adopters locked in even better economics.

Frequently Asked Questions

Popular Conversions

Jump to a ready-made conversion — useful for quick reference and sharing:

Browse all Construction

Tile Calculator

Work out tile quantity for floors, walls, showers and backsplashes in sq ft or sq m, with adjustable wastage allowance for straight, diagonal and herringbone layouts.

Paint Calculator

Estimate paint in litres or gallons from room dimensions, coats and coverage, subtracting doors and windows — works for interior emulsion and exterior weather coats.

Concrete Calculator

Compute cement bags, sand and aggregate in m3 for slabs, footings, beams and columns using M15, M20 or M25 mix ratios with the 1.54 dry-volume factor.

Brick Calculator

Estimate bricks, mortar, cement bags and sand for a single wall or a 4-wall plot. Supports 22 brick & block standards, ft+in or metric input, openings deduction, and 2D + 3D visualizations.

Square Footage Calculator

Calculate area from length and width and convert square feet to square metres, square yards, acres, Marla and Kanal for property, flooring and material estimates.

Plot Area Calculator (4-Sided)

Calculate plot area from four sides (North, South, East, West) in Marla, Kanal, and Acres.

Plot Area Calculator (3-Sided / Triangular)

Calculate the exact area of a triangular plot from three side lengths using Heron's formula. Marla, Kanal, Acre.

Plot Area Calculator (5-Sided / Pentagonal)

Estimate the area of a 5-sided pentagonal plot from its five side lengths. Cyclic-polygon method.

Browse all Construction calculators & converters

See every tool in this category, plus FAQs and category-specific guides.

Browse other categories

Islamic9 Financial14 Gold & Silver8 Health25 Unit19 Date & Time9 Math21 Utility20 Fun12

Solar Panel Calculator — panels needed | Premium Converters

Premium Converters

Premium Converters

Solar Panel Calculator

Solar Panel Calculator

Your Energy Requirement

Solar Panel Selection

Panel Pricing

Payback Timeline

Monthly Generation (seasonal)

Cost Breakdown

10-Year Value

Step-by-step calculation

Overview — Solar Panel Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Solar Panel Calculator?

The Formula

Solar System Sizing — By Monthly Electricity Usage (Pakistan)

Put It in Perspective

Practical Examples

Frequently Asked Questions

What system size do I need for my home?

What's the difference between kW and kVA?

Grid-tied vs hybrid vs off-grid — which is best?

How many years do solar panels last?

What does 'peak sun hours' mean?

Do I need a battery?

What maintenance do solar panels need?

Will net metering save me money?

Which panel brand is best for Pakistan?

Popular Conversions

Embed this calculator on your site

More Construction Tools

Browse other categories

Premium Converters

Solar Panel Calculator

Solar Panel Calculator

Your Energy Requirement

Solar Panel Selection

Panel Pricing

Payback Timeline

Monthly Generation (seasonal)

Cost Breakdown

10-Year Value

Step-by-step calculation

Overview — Solar Panel Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Solar Panel Calculator?

The Formula

Solar System Sizing — By Monthly Electricity Usage (Pakistan)

Put It in Perspective

Practical Examples

Frequently Asked Questions

What system size do I need for my home?

What's the difference between kW and kVA?

Grid-tied vs hybrid vs off-grid — which is best?

How many years do solar panels last?

What does 'peak sun hours' mean?

Do I need a battery?

What maintenance do solar panels need?

Will net metering save me money?

Which panel brand is best for Pakistan?

Popular Conversions

Embed this calculator on your site

More Construction Tools

Browse other categories