Lawn Area Calculator
Calculate the total area of an irregularly-shaped lawn by adding up multiple rectangle, circle, and triangle sections.
Lawn Sections
#1
1000.0 sq ft
#2
201.1 sq ft
Total Lawn Area
1201.1 sq ft
133.5 sq yd
0.0276 acresHow to Calculate the Area of an Irregularly-Shaped Lawn
Most yards aren't one clean rectangle — they're made up of a few simple shapes stitched together around a house, driveway, or garden bed. This calculator lets you break your lawn into sections (rectangles, circles, and triangles), enter the dimensions of each, and adds up every section's area for a total lawn size.
Example
A main rectangular lawn of 40 ft × 25 ft (1,000 sq ft) plus a circular section around a tree with an 8 ft radius (about 201 sq ft) gives a total lawn area of roughly 1,201 sq ft — about 0.028 acres.
Common Use Cases
- Getting an accurate total area for an L-shaped, curved, or multi-section yard.
- Feeding a correct square footage into a seed, fertilizer, or sod calculator.
- Comparing the size of different sections of a yard for landscaping planning.
FAQs
What if part of my lawn is an odd shape that isn't listed?
Approximate it with the closest simple shape available, or split it into two or three sections that together resemble the actual area — for most residential yards, a combination of rectangles, circles, and triangles gets you close enough for seed, fertilizer, or mulch estimates.
Should I subtract driveways, patios, or garden beds?
Yes — this calculator adds up only the sections you enter, so simply don't include paved or planted areas as lawn sections, or add them as a separate negative check against your total property size.
How do I convert the result to acres?
Divide the total square footage by 43,560 (the number of square feet in an acre). The result box below shows this conversion automatically alongside the square footage total.