Tool
Measure your lawn
Most lawns are a few simple shapes. Add each one, take out the house, the drive and the beds, and get the square footage for the calculator.
Lawn area calculator
Your lawn
7,487sq ft
9,600 sq ft of shapes, minus 2,113 sq ft cut out.
Use 7,487 sq ft in the calculatorHow to measure a lawn
- Sketch the yard. Break the grass into simple shapes: rectangles for most of it, circles for round areas, triangles for odd corners.
- Measure in feet. A long tape or a measuring wheel works for most lawns. For a big lot, the distance tool in an online map gets you close.
- Take out what is not grass. Mark the house, drive, patio, pool and planting beds as cut-outs. Fertilizer on them is wasted, and on pavement it washes into storm drains.
- Send the total to the calculator. The button above carries your square footage across, so you can go straight to pounds and bags.
The formulas
Rectangle
length × width
50 ft × 100 ft = 5,000 sq ft
Circle
3.1416 × (across ÷ 2)²
20 ft across = 314 sq ft
Triangle
base × height ÷ 2
30 ft × 40 ft ÷ 2 = 600 sq ft