Plot Area Calculator (4-Sided)
Calculate plot area from four sides (North, South, East, West) in Marla, Kanal, and Acres.
Construction
Plot Area Calculator (4-Sided)
Generated on April 24, 2026
Plot Shape (top = North)
?What is the Plot Area Calculator (4-Sided)?
A plot area calculator estimates the total area of an irregular four-sided plot of land when you know the length of each of its four sides — typically labeled by compass direction (North, South, East, West). This is exactly the situation most Pakistani and South Asian property owners face: land-registry documents (Intiqaal, Fard Malkiat) list the four side lengths of a plot but rarely list the area directly. The tool is invaluable for homebuyers verifying a plot's claimed size, sellers preparing accurate listings, real-estate agents comparing properties, Patwari record verification, and property inheritance divisions where exact area determines each heir's share. Results are shown in square feet, square meters, Marla (with custom size selection), Kanal, and Acres.
The Formula
When only the four side lengths of a plot are known, there is no unique mathematical area — the same four sides can form infinitely many quadrilateral shapes, each with a slightly different area. The practical convention used by Pakistani Patwaris and property surveyors for approximately-rectangular plots is the averaging method: treat opposite sides as a matched pair, average them, and multiply the two averages like a rectangle. This gives an accurate area for plots that are 'mostly rectangular' (most urban residential plots). For highly irregular plots where opposite sides differ by more than 15%, the tool shows a warning because the approximation error grows — in those cases a surveyor should measure one diagonal and apply the triangulation method for legal precision.
Practical Examples
A plot with sides 67, 42, 60, 72 ft gives an average length of 63.5 ft, average width of 57 ft, and area ≈ 3,619.5 sq ft — roughly 13.31 Marla (standard 272 sq ft system).
A 60 × 90 ft plot (equal opposite sides) is 5,400 sq ft — just under 1 Kanal (5,440 sq ft) in the 272 sq ft Marla system.
A 30 × 60 ft plot is 1,800 sq ft, or about 6.62 Marla — a typical 5-7 Marla residential plot in a Pakistani housing society.
A plot with sides 100, 95, 80, 85 ft has avg length 97.5 and avg width 82.5, giving 8,044 sq ft ≈ 29.57 Marla or about 1.48 Kanal.
A 180 × 100 ft plot equals 18,000 sq ft ≈ 66.18 Marla ≈ 3.31 Kanal ≈ 0.413 acres — the size of a luxury urban house.
A commercial corner plot with sides 45, 40, 60, 55 ft averages 42.5 × 57.5 = 2,444 sq ft ≈ 8.99 Marla — common shop-front sizing.