Do trigonometric functions use radians or degrees?

Radians — and this catches almost every student exactly once, usually on an exam. To compute sine of 30 degrees, you can't just write sin(30); that gives you sine of 30 radians (roughly -0.988, which makes no sense for a homework problem). You need to convert first: sin(30 * pi / 180) gives the correct 0.5. This is the same convention used in JavaScript, Python, C++, and basically every programming language. Get comfortable with radians early — they're how the real world of physics, engineering, and code actually works.

What is the order of operations used?

Standard PEMDAS, which you might know as BODMAS depending on which textbook your Pakistani school used — same rules, different name. Parentheses first, then exponents, then multiplication and division left-to-right, then addition and subtraction left-to-right. Unary minus is handled first. Parentheses always override precedence, which is why wrapping anything ambiguous in parens is a good habit. Note: -3^2 evaluates to -9 (exponent before unary minus), while (-3)^2 evaluates to 9. The parenthesis is the safe move.

No — this is a direct numerical expression evaluator, not a symbolic algebra system. You'll need to substitute concrete numbers before entering. For symbolic work — solving equations, simplifying expressions, differentiating, integrating — reach for a proper computer algebra system: Wolfram Alpha for one-off problems, SymPy in Python for repeatable scripted work, or a graphing calculator if you need to visualise functions across a range.

What happens with very large or very small numbers?

The calculator uses JavaScript's IEEE 754 double-precision floating-point arithmetic, which handles numbers from roughly 10^-308 to 10^308. Beyond that range you get 'Infinity' or you lose precision quietly. The output uses scientific notation for very large or very small results — 1.23e+15 means 1.23 times 10 to the 15th. For most homework and engineering work you'll never hit these limits, but it's worth knowing they exist.

Is this accurate enough for engineering work?

For almost all practical purposes, yes — you get about 15 to 17 significant digits, which is more precision than any physical measurement on the planet actually requires. The exception: long iterative calculations involving subtle differences of large numbers can quietly lose precision through what's called numerical cancellation. For specialised numerics — ill-conditioned matrices, careful iterative algorithms, finite element work — use a proper library like NumPy, SciPy, or MATLAB instead. They expose more control over precision and error tracking.

Why not use my phone's built-in calculator?

Phone calculators are fine for quick arithmetic but they hide operator precedence, give you no multi-line history, and make copy-pasting a long expression a pain. This calculator displays your full expression before evaluating, which lets you spot a missing parenthesis or a stray minus sign before you commit. For any calculation longer than 'two numbers and an operation', that visibility saves you from silent errors.

Does this calculator handle imaginary or complex numbers?

No — real numbers only. Inputs like sqrt(-1) return 'NaN' (not a number) rather than i. For complex arithmetic you'd need specialised software like Wolfram Alpha, MATLAB, or a Python numpy script. For most school and engineering problems, real-number-only is what you actually want; complex arithmetic shows up mainly in electrical engineering, signal processing, and parts of physics.

Premium Converters

Scientific Calculator

Math

Evaluate complex math expressions with trigonometric functions (sin, cos, tan), logarithms, exponents, square roots, parentheses, and constants like pi and e, following PEMDAS order.

Math

Scientific Calculator

Generated on May 23, 2026

Expression

Supported: + − × ÷ ^ sin cos tan sqrt log ln abs pi e

Quick Answer

Evaluate complex math expressions with trigonometric functions (sin, cos, tan), logarithms, exponents, square roots, parentheses, and constants like pi and e, following PEMDAS order.

Overview — Scientific Calculator

Math

A scientific calculator evaluates arbitrary mathematical expressions that include arithmetic, trigonometric functions (sin, cos, tan), logarithms (log, ln), square roots, exponents, absolute value, and mathematical constants (π and e). It supports nested parentheses and standard operator precedence, so expressions written with normal math notation are evaluated exactly as you would expect. This tool replaces a physical scientific calculator for students working through problem sets, engineers doing quick checks, and anyone evaluating complex expressions without firing up a spreadsheet.

Formula

Standard order of operations (PEMDAS / BODMAS): Parentheses → Exponents → Multiplication/Division (left to right) → Addition/Subtraction (left to right). Trigonometric functions take radians as input.

Trig functions take radians, not degrees — multiply degrees by π/180 to convert.

π (pi) ≈ 3.14159; e (Euler's number) ≈ 2.71828 — the two most-used constants in math.

JavaScript's Math.sin(30) returns the sine of 30 RADIANS (≈ −0.988), not 30 degrees.

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

Your physics homework is due tomorrow, your school Casio is somewhere in the bottom of a bag at home, and you need to compute sin(60 degrees) plus a square root before midnight. Or maybe you're helping your nephew with his trigonometry and the calculator app on your phone refuses to do anything beyond basic arithmetic. Either way, this is the calculator that handles the messy real-math expressions — nested parentheses, trigonometric functions, logarithms, exponents, the constants pi and e — with proper PEMDAS order baked in. One thing that catches almost everyone off-guard the first time: the trig functions expect radians, not degrees, just like JavaScript, Python, and almost every programming language. So sin(30) does not give you 0.5; it gives you the sine of 30 radians, which is roughly negative 0.988. To compute sine of 30 degrees, you write sin(30 * pi / 180). It's not a bug, it's a convention — and getting comfortable with radians early pays off forever in physics, engineering, and any code you'll ever write. Use the calculator for quick numerical checks; for symbolic algebra or solving equations, reach for Wolfram Alpha or SymPy. This is a fast, precise numerical workbench, not a symbolic math engine.

Pro tips most people learn the hard way

Trig functions take radians, not degrees. To compute sine of an angle in degrees, multiply by pi/180 first. So sin(30 degrees) is written sin(30 * pi / 180), which gives 0.5. This trips up every student exactly once — usually on an exam.
Always wrap unary minus and complex sub-expressions in parentheses, even when you think they're not needed. The calculator follows PEMDAS strictly, but -3^2 evaluates to -9 (exponent before unary minus), while (-3)^2 evaluates to 9. The parenthesis is the safe habit.
JavaScript IEEE 754 floats give you about 15 to 17 significant digits of precision — more than any physical measurement will ever need. But computations involving very small differences of large numbers (numerical cancellation) can lose precision quietly. Watch out for that in long iterative calculations.
Implicit multiplication isn't supported. Writing 2pi or 3(x+1) will fail — you must write 2*pi or 3*(x+1). Most students try the short form once, get an error, then learn. It's a small price for unambiguous parsing.
For symbolic work (solving equations, factoring, differentiation), this calculator isn't the right tool — it's a numerical evaluator. Reach for Wolfram Alpha for one-off symbolic problems, SymPy in Python for repeatable work, or a graphing calculator if you need to visualise functions across a range.

?What is the Scientific Calculator?

The Formula

Standard order of operations (PEMDAS / BODMAS): Parentheses → Exponents → Multiplication/Division (left to right) → Addition/Subtraction (left to right). Trigonometric functions take radians as input.

PEMDAS ensures that compound expressions are unambiguous: 2 + 3 × 4 is always 14 (not 20), because multiplication precedes addition. Parentheses override precedence, so (2 + 3) × 4 = 20. Trigonometric functions in this calculator, like most programming languages, expect radians; to pass degrees, convert first using × π / 180. The calculator handles negative values, fractional exponents, and very large or very small results via JavaScript's IEEE 754 double-precision arithmetic (about 15–17 significant digits of accuracy).

Common Trigonometric Values — Scientific Calculator Reference

Standard sin/cos/tan values for common angles. Use these to verify calculator results or for quick mental math.

Angle (°)	Angle (rad)	sin	cos	tan
0°	0	0	1	0
30°	π/6	0.5	0.866	0.577
45°	π/4	0.707	0.707	1
60°	π/3	0.866	0.5	1.732
90°	π/2	1	0	undefined
120°	2π/3	0.866	-0.5	-1.732
135°	3π/4	0.707	-0.707	-1
150°	5π/6	0.5	-0.866	-0.577
180°	π	0	-1	0
270°	3π/2	-1	0	undefined
360°	2π	0	1	0

Put It in Perspective

Trig functions take radians, not degrees — multiply degrees by π/180 to convert.

π (pi) ≈ 3.14159; e (Euler's number) ≈ 2.71828 — the two most-used constants in math.

JavaScript's Math.sin(30) returns the sine of 30 RADIANS (≈ −0.988), not 30 degrees.

Order of operations (PEMDAS): Parentheses → Exponents → Multiplication/Division → Addition/Subtraction.

Practical Examples

2 * (3 + 4) ^ 2 = 98 — parentheses first, then exponent, then multiplication.

sqrt(16) + log(100) = 4 + 2 = 6 — square root and base-10 log of familiar numbers.

sin(pi / 2) = 1 — 90 degrees in radians gives the sine's maximum value.

ln(e ^ 5) = 5 — the natural log and exponential are inverse functions.

sqrt(3 ^ 2 + 4 ^ 2) = 5 — the classic Pythagorean 3-4-5 right triangle.

(1 + 0.05) ^ 10 = 1.6289 — compound interest factor for 5% annual growth over 10 years.

Frequently Asked Questions

Arithmetic: +, −, *, /, ^ for power. Functions: sqrt(), abs(), sin(), cos(), tan(), log() for base-10 log, and ln() for natural log (base e). Constants: pi (3.14159…) and e (2.71828…). Parentheses work at any depth, so you can nest expressions as deeply as you need. One thing to remember: implicit multiplication isn't supported — writing 2pi or 3(x+1) will fail. You need to put the explicit asterisk in, so 2*pi or 3*(x+1). Small price for unambiguous parsing.

Popular Conversions

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

Browse all Math

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Subject-wise marks, grades, and a printable school result card — ideal for small schools and parents.

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Add, subtract, multiply, and divide proper, improper, and mixed fractions with automatic reduction to lowest terms and decimal equivalents for cooking, carpentry, and homework.

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Simplify ratios to lowest terms using GCD and solve proportions like a:b = c:x for any missing value — useful for recipes, map scales, aspect ratios, and mixing ingredients.

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Compute the arithmetic mean, median, mode, range, count, sum, minimum, and maximum from any list of numbers — essential for descriptive statistics, surveys, and grading.

LCM / GCD Calculator

Find the LCM and GCD (HCF) of two or more integers using the Euclidean algorithm — useful for simplifying fractions, finding common denominators, and scheduling repeating events.

Prime Number Checker

Test whether any integer is a prime number using trial division up to its square root, and view the complete unique prime factorization for composite numbers.

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

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Premium Converters

Scientific Calculator

Math

Evaluate complex math expressions with trigonometric functions (sin, cos, tan), logarithms, exponents, square roots, parentheses, and constants like pi and e, following PEMDAS order.

Math

Scientific Calculator

Generated on May 23, 2026

Expression

Supported: + − × ÷ ^ sin cos tan sqrt log ln abs pi e

Quick Answer

Evaluate complex math expressions with trigonometric functions (sin, cos, tan), logarithms, exponents, square roots, parentheses, and constants like pi and e, following PEMDAS order.

Overview — Scientific Calculator

Math

Formula

Standard order of operations (PEMDAS / BODMAS): Parentheses → Exponents → Multiplication/Division (left to right) → Addition/Subtraction (left to right). Trigonometric functions take radians as input.

Trig functions take radians, not degrees — multiply degrees by π/180 to convert.

π (pi) ≈ 3.14159; e (Euler's number) ≈ 2.71828 — the two most-used constants in math.

JavaScript's Math.sin(30) returns the sine of 30 RADIANS (≈ −0.988), not 30 degrees.

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

Trig functions take radians, not degrees. To compute sine of an angle in degrees, multiply by pi/180 first. So sin(30 degrees) is written sin(30 * pi / 180), which gives 0.5. This trips up every student exactly once — usually on an exam.
Always wrap unary minus and complex sub-expressions in parentheses, even when you think they're not needed. The calculator follows PEMDAS strictly, but -3^2 evaluates to -9 (exponent before unary minus), while (-3)^2 evaluates to 9. The parenthesis is the safe habit.
JavaScript IEEE 754 floats give you about 15 to 17 significant digits of precision — more than any physical measurement will ever need. But computations involving very small differences of large numbers (numerical cancellation) can lose precision quietly. Watch out for that in long iterative calculations.
Implicit multiplication isn't supported. Writing 2pi or 3(x+1) will fail — you must write 2*pi or 3*(x+1). Most students try the short form once, get an error, then learn. It's a small price for unambiguous parsing.
For symbolic work (solving equations, factoring, differentiation), this calculator isn't the right tool — it's a numerical evaluator. Reach for Wolfram Alpha for one-off symbolic problems, SymPy in Python for repeatable work, or a graphing calculator if you need to visualise functions across a range.

?What is the Scientific Calculator?

The Formula

Common Trigonometric Values — Scientific Calculator Reference

Standard sin/cos/tan values for common angles. Use these to verify calculator results or for quick mental math.

Angle (°)	Angle (rad)	sin	cos	tan
0°	0	0	1	0
30°	π/6	0.5	0.866	0.577
45°	π/4	0.707	0.707	1
60°	π/3	0.866	0.5	1.732
90°	π/2	1	0	undefined
120°	2π/3	0.866	-0.5	-1.732
135°	3π/4	0.707	-0.707	-1
150°	5π/6	0.5	-0.866	-0.577
180°	π	0	-1	0
270°	3π/2	-1	0	undefined
360°	2π	0	1	0

Put It in Perspective

Trig functions take radians, not degrees — multiply degrees by π/180 to convert.

π (pi) ≈ 3.14159; e (Euler's number) ≈ 2.71828 — the two most-used constants in math.

JavaScript's Math.sin(30) returns the sine of 30 RADIANS (≈ −0.988), not 30 degrees.

Order of operations (PEMDAS): Parentheses → Exponents → Multiplication/Division → Addition/Subtraction.

Practical Examples

2 * (3 + 4) ^ 2 = 98 — parentheses first, then exponent, then multiplication.

sqrt(16) + log(100) = 4 + 2 = 6 — square root and base-10 log of familiar numbers.

sin(pi / 2) = 1 — 90 degrees in radians gives the sine's maximum value.

ln(e ^ 5) = 5 — the natural log and exponential are inverse functions.

sqrt(3 ^ 2 + 4 ^ 2) = 5 — the classic Pythagorean 3-4-5 right triangle.

(1 + 0.05) ^ 10 = 1.6289 — compound interest factor for 5% annual growth over 10 years.

Frequently Asked Questions

Popular Conversions

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

Browse all Math

GPA Calculator

Calculate your semester or cumulative Grade Point Average on the 4.0 scale, weighted by credit hours, with support for both weighted and unweighted grading systems.

Grade Calculator

Calculate your final grade from weighted categories like tests, homework, and exams.

Student Result Card Calculator

Subject-wise marks, grades, and a printable school result card — ideal for small schools and parents.

Fraction Calculator

Add, subtract, multiply, and divide proper, improper, and mixed fractions with automatic reduction to lowest terms and decimal equivalents for cooking, carpentry, and homework.

Ratio Calculator

Simplify ratios to lowest terms using GCD and solve proportions like a:b = c:x for any missing value — useful for recipes, map scales, aspect ratios, and mixing ingredients.

Average Calculator

Compute the arithmetic mean, median, mode, range, count, sum, minimum, and maximum from any list of numbers — essential for descriptive statistics, surveys, and grading.

LCM / GCD Calculator

Find the LCM and GCD (HCF) of two or more integers using the Euclidean algorithm — useful for simplifying fractions, finding common denominators, and scheduling repeating events.

Prime Number Checker

Test whether any integer is a prime number using trial division up to its square root, and view the complete unique prime factorization for composite numbers.

Browse all Math 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 Construction22 Utility20 Fun12

Scientific Calculator — Evaluate complex math expressions with trigonometric functions… | Premium Converters

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Scientific Calculator

Scientific Calculator

Overview — Scientific Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Scientific Calculator?

The Formula

Common Trigonometric Values — Scientific Calculator Reference

Put It in Perspective

Practical Examples

Frequently Asked Questions

Popular Conversions

Embed this calculator on your site

Browse other categories

Premium Converters

Scientific Calculator

Scientific Calculator

Overview — Scientific Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Scientific Calculator?

The Formula

Common Trigonometric Values — Scientific Calculator Reference

Put It in Perspective

Practical Examples

Frequently Asked Questions

Popular Conversions

Embed this calculator on your site

Browse other categories

Premium Converters

Premium Converters

Scientific Calculator

Scientific Calculator

Overview — Scientific Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Scientific Calculator?

The Formula

Common Trigonometric Values — Scientific Calculator Reference

Put It in Perspective

Practical Examples

Frequently Asked Questions

Which operators and functions are supported?

Do trigonometric functions use radians or degrees?

What is the order of operations used?

Can I use variables?

What happens with very large or very small numbers?

Is this accurate enough for engineering work?

Why not use my phone's built-in calculator?

Does this calculator handle imaginary or complex numbers?

Popular Conversions

Embed this calculator on your site

More Math Tools

Browse other categories

Premium Converters

Scientific Calculator

Scientific Calculator

Overview — Scientific Calculator

From the editors — what to know before you start

Pro tips most people learn the hard way

?What is the Scientific Calculator?

The Formula

Common Trigonometric Values — Scientific Calculator Reference

Put It in Perspective

Practical Examples

Frequently Asked Questions

Which operators and functions are supported?

Do trigonometric functions use radians or degrees?

What is the order of operations used?

Can I use variables?

What happens with very large or very small numbers?

Is this accurate enough for engineering work?

Why not use my phone's built-in calculator?

Does this calculator handle imaginary or complex numbers?

Popular Conversions

Embed this calculator on your site

More Math Tools

Browse other categories