Land UnitsHow to measure a plot that is not a rectangle
- Measure all four sides with a tape.
- Measure one diagonal, corner to opposite corner. This is the step people skip, and without it the area cannot be known.
- The diagonal cuts the plot into two triangles. The calculator finds the area of each from its three sides and adds them.
The sums it uses
- Rectangle: length × breadth.
- Triangle: Heron's formula. Take half the total of the three sides (call it s). The area is the square root of s × (s − a) × (s − b) × (s − c).
- Four sides: two triangles that share the diagonal.
Why four sides alone are not enough
A four-sided frame can be pushed flat like a folding gate without changing the length of any side. Its area shrinks as it leans. The diagonal locks the shape, which is why surveyors always take it.
Tips for a true measure
- Keep the tape straight and level, not along a slope.
- Measure each side twice.
- For plots with more than four sides, split them into triangles and add the areas.
For a sale, a loan or a court paper, go by your own revenue record. Local units can differ between districts and between old and new records. The sizes here were read in the official documents named under Sources on 11 November 2026. This site is not a government site and gives no legal advice.