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Land measurement calculator

Enter the side lengths of your land to get its area — in square feet, decimals, katha, bigha and acres. For four-sided land, adding a diagonal gives an exact result; without it you still get an approximate one.

Enter all sides and the diagonal in the same unit.

A B C D North East South West Diagonal (A→C)

Lengths of the four sides

Enter the boundary lengths as shown in the diagram above.

Diagonal length Optional

The straight-line distance from corner A to corner C. If given, the result will be exact; without it you still get an approximate result from the four sides.

A B C

Lengths of the three sides

If you know all three sides — A, B and C — Heron's formula gives the exact area.

Split irregular land into triangles

Divide the whole plot into several triangles and enter the three sides of each. They will be added up to show the total area.

Measurement result

Exact calculation
Total area 0 Square feet
decimal0
Katha0
Bigha0
Acre0
Square metres0
Square yards0
Your input: —
What this result means: Area calculated according to the measurement type.
Conversion values: 1 decimal = 435.6 sq ft, 1 katha = 720 sq ft, 1 bigha = 14,400 sq ft, 1 acre = 43,560 sq ft.

FAQ

No, it is mathematically impossible. With the same four sides, changing the angles changes the area — push a door frame out of square and the sides stay the same but the space inside shrinks. So the result from four sides is the maximum possible area; the actual area is equal to or less than that. Measure one diagonal for an exact result.

The diagonal is the straight-line distance from one corner of the land to the opposite corner. This calculator uses the distance from the north-west corner (A) to the south-east corner (C) — the orange dashed line in the diagram above. Pull the tape tight and measure directly from corner to corner.

Go to the polygon tab. Mentally divide the whole plot into several triangles, measure the three sides of each and add them as separate parts. The calculator will work out each triangle's area and add them up.

It is for your own understanding. For deeds, mutation (namjari), registration or boundary demarcation, the measurement of a licensed surveyor or amin is final.

1 decimal = 435.6 sq ft, 1 katha = 720 sq ft, 1 bigha = 20 katha = 14,400 sq ft and 1 acre = 43,560 sq ft.

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