Land & Area
Area Calculator
Area of a rectangle, triangle, circle, trapezoid or L-shape, in metric and imperial units.
Rectangle A = l × w
Also called calculate area · surface area calculator
Home & Construction · 12 calculators
Land & Area Calculators
Area of plots and irregular land, square feet and square meters, acres and hectares, perimeter and basic shapes.
Land & Area
Land Area Calculator
Plot area in acres, hectares, square metres and local units such as bigha and gunta.
Heron’s formula for triangles; length × w…
Also called plot area calculator · land measurement
Land & Area
Square Footage Calculator
Square footage of a room, floor or plot, including multiple rooms and a waste allowance.
area = length × width × rooms × (1 + wast…
Also called sq ft calculator · square feet of a room
Land & Area
Acre Calculator
Convert a plot to acres and work out the dimensions of an acre in any shape.
1 acre = 43,560 ft² = 4,046.86 m²
Also called how big is an acre · acres from dimensions
Land & Area
Hectare Calculator
Convert land area to and from hectares, with acres, square metres and dimension checks.
1 hectare = 10,000 m² = 2.4711 acres
Also called hectare to acre · how big is a hectare
Land & Area
Rectangle Calculator
Area, perimeter and diagonal of a rectangle from its length and width, with the aspect ratio.
A = l × w
Also called rectangle area · area of rectangle
Land & Area
Triangle Calculator
Solve any triangle from three sides (SSS): area with Heron’s formula, perimeter, angles, heights and triangle type.
Area = √(s(s − a)(s − b)(s − c)), s = (a …
Also called triangle area calculator · herons formula calculator
Land & Area
Circle Calculator
Enter a circle’s radius, diameter, circumference or area and get all the others instantly.
A = πr²
Also called circle area · circumference calculator
Land & Area
Irregular Land Area Calculator
Area of an irregular plot from its corner coordinates, using the surveyor’s shoelace formula.
A = ½ |Σ (xᵢ·yᵢ₊₁ − xᵢ₊₁·yᵢ)|
Also called shoelace formula · polygon area calculator
Land & Area
Perimeter Calculator
Perimeter of a rectangle, triangle, circle or polygon, with the fencing needed.
Rectangle P = 2(l + w)
Also called perimeter of a shape · fence length calculator
Land & Area
Triangle Area Calculator
Area of a triangle from base and height, two sides and the included angle, or three sides — pick whichever you know.
½·b·h
Also called area of a triangle · triangle area formula
Land & Area
Circle Area Calculator
Find the area of a circular plot, patio or table from its radius or diameter, in any unit of length.
A = π r² = π d² / 4
Also called area of circle · circular area
Key land & area formulas
| Area | Rectangle A = l × w · Triangle A = ½bh · Circle A = πr² |
|---|---|
| Land Area | Heron’s formula for triangles; length × width for rectangles |
| Square Footage | area = length × width × rooms × (1 + waste) |
| Acre | 1 acre = 43,560 ft² = 4,046.86 m² |
| Hectare | 1 hectare = 10,000 m² = 2.4711 acres |
| Rectangle | A = l × w · P = 2(l + w) · d = √(l² + w²) |
| Triangle | Area = √(s(s − a)(s − b)(s − c)), s = (a + b + c)/2 |
| Circle | A = πr² · C = 2πr · d = 2r |
| Irregular Land Area | A = ½ |Σ (xᵢ·yᵢ₊₁ − xᵢ₊₁·yᵢ)| |
| Perimeter | Rectangle P = 2(l + w) · Circle P = 2πr |
Land & Area questions
How big is an acre?
An acre is 43,560 square feet — a square of about 209 ft per side, or roughly 90% of an American football field.
How do I find the area with base and height?
Area = ½ × base × height. Use the triangle area calculator for that method, or enter all three sides here to use Heron’s formula.