Measure your lot on the map
Type an address into the search box and the map jumps to a satellite view of the property. Tap the corners of the land to trace its edge. Acres and the perimeter add up as you go, and every extra area you trace joins the total.
The result is a traced estimate, not a survey or legal parcel boundary. The map does not load property lines, so trace what you can see from above: fences, tree lines, field edges and driveways. For a sale, a loan or a boundary question, use the acreage on the recorded plat or survey.
Only need the grass? The lawn size calculator traces just the turf, so seed, fertilizer and sod amounts match the area you mow.
How to measure acreage on a map
Find the property, zoom in until the edge is easy to see, and place a point at every corner and every bend. A straight run needs only its two ends. A curve needs several points, and each one pulls the outline closer to the real edge.
The area comes from the Google Maps geometry library, which measures your outline on a model of the round earth. For the shape you draw, the math adds almost no error. What matters is where the corners land: trees hiding an edge, shadows, or imagery that sits slightly off its true position.
- Start at a corner you can pick out for sure, like a fence corner or the end of a driveway.
- Zoom in to place each point, then zoom out to check the whole shape.
- Switch to the Map view to see roads and street names, then back to Satellite to trace.
- Drag any point to fix it after you finish. Keep the edges from crossing.
- Trace separate parcels or fields as separate areas. The total adds them together.
Acres to square feet chart
One acre is 43,560 square feet. Multiply acres by 43,560 to get square feet, or divide square feet by 43,560 to get acres.
Swipe sideways to see every column.
| Acres | Square feet | Hectares | Side of a square lot |
|---|---|---|---|
| 0.1 | 4,356 | 0.040 | 66 ft |
| 0.25 | 10,890 | 0.101 | 104 ft |
| 0.5 | 21,780 | 0.202 | 148 ft |
| 0.75 | 32,670 | 0.304 | 181 ft |
| 1 | 43,560 | 0.405 | 209 ft |
| 1.5 | 65,340 | 0.607 | 256 ft |
| 2 | 87,120 | 0.809 | 295 ft |
| 2.5 | 108,900 | 1.012 | 330 ft |
| 3 | 130,680 | 1.214 | 361 ft |
| 4 | 174,240 | 1.619 | 417 ft |
| 5 | 217,800 | 2.023 | 467 ft |
1 acre = 43,560 sq ft = 0.405 hectares. Square sides are rounded to the nearest foot.
Is 200 ft by 200 ft an acre?
No. 200 ft × 200 ft is 40,000 square feet, which is 0.918 acre, or 3,560 square feet short of a full acre. A square acre is about 208.7 feet on each side. An acre does not have to be square, though. 66 ft × 660 ft is exactly one acre too, the traditional shape of one chain (66 ft) by one furlong (660 ft).
Swipe sideways to see every column.
| Lot size | Square feet | Acres |
|---|---|---|
| 50 ft × 100 ft | 5,000 | 0.115 |
| 100 ft × 100 ft | 10,000 | 0.230 |
| 100 ft × 200 ft | 20,000 | 0.459 |
| 150 ft × 150 ft | 22,500 | 0.517 |
| 200 ft × 200 ft | 40,000 | 0.918 |
| 66 ft × 660 ft | 43,560 | 1.000 |
| 300 ft × 300 ft | 90,000 | 2.066 |
| 330 ft × 660 ft | 217,800 | 5.000 |
| 660 ft × 660 ft | 435,600 | 10.000 |
Acres = length × width in feet ÷ 43,560.