Plot Area Calculator (7-Sided / Heptagonal)

Pro tips most people learn the hard way

• Heptagonal plots are rare and most dealers cannot value them correctly. Always run the seven sides through this calculator before discussing price. Expect 8 to 15 percent discount per Marla versus a rectangular plot in the same scheme — that is the architectural inefficiency reflected in market price.
• Walk the boundary in a single direction and enter the sides in walking order. Sketch the plot first with corners labeled A through G. Skipping or reversing a side gives a wrong shape and the calculator will not flag it because the polygon still closes — just incorrectly.
• The cyclic-heptagon method is an estimate of the maximum possible area. For inheritance distributions, contested sales, or any transaction above a few Marla, demand a Patwari-certified triangulated demarcation — the 5 to 10 percent margin of error in the cyclic estimate is enough to start a family dispute over who got the bigger share.
• A regular heptagon (all seven sides equal) has area 3.634 times s squared. Useful as a sanity check: a 50 ft regular heptagon equals 9,085 sq ft, about 33.4 Marla. If your seven-equal-sides input does not match this, you typoed a side length.
• Heptagons often result from cumulative corner clipping — what was once a clean rectangular 10 Marla plot has lost three corners over the decades to a drain easement, a transformer pad, and a tea-stall setback. The lost area can be 10 to 20 percent of the original buildable rectangle. Always price accordingly.