Acreage Calculator
Convert any lot's length and width in feet into acres using the standard 43,560 square feet per acre, for land, farm, or lawn sizing.
How this calculator works
An acre is a fixed unit of area — 43,560 square feet — regardless of the shape of the land it measures. This calculator takes your length and width in feet, multiplies them into square feet, then divides by 43,560 to convert straight to acres.
Formula: Acres = (Length ft × Width ft) ÷ 43,560.
Worked example
A 300 ft × 200 ft parcel:
- Square feet: 300 × 200 = 60,000 sq ft
- Acres: 60,000 ÷ 43,560 ≈ 1.38 acres
- With the price field left at $0.00, cost reads $0.00 unless you enter a per-acre rate.
Coverage reference
| Lot dimensions | Acres |
|---|---|
| 150 ft × 100 ft | 0.34 acres |
| 300 ft × 200 ft | 1.38 acres |
| 600 ft × 400 ft | 5.51 acres |
How to measure your lot
Pace off or measure the property’s length and width in feet along its boundary lines, using a deed, plat map, or GPS-based measuring app for anything beyond a rough estimate. Irregular parcels should be broken into rectangular or triangular sections, each measured and converted separately, then summed — for anything tied to a real-estate transaction or boundary dispute, rely on a recorded survey rather than a field measurement.
Frequently asked questions
How many square feet are in an acre?
43,560 square feet, which is the fixed conversion this calculator divides your area by. It's an odd-looking number because an acre was originally defined as the area a team of oxen could plow in one day — a strip one furlong (660 ft) long by one chain (66 ft) wide, which multiplies out to exactly 43,560 sq ft.
How big is an acre compared to something I can picture?
An acre is roughly the size of a standard American football field without the end zones (about 48,000 sq ft including end zones, so an acre is a bit smaller). It's also close to 90% of a soccer pitch, or about 16 average suburban house lots.
My property isn't a rectangle — how do I get an accurate acreage?
Break the parcel into rectangular or triangular sections, calculate each section's square footage separately, add them together, then divide the combined total by 43,560. For a legally precise figure for a sale, subdivision, or survey, a licensed surveyor's plat is the authoritative source rather than a field measurement.
Why is the price field $0 by default?
Land value per acre varies enormously by location, zoning, and use, so there's no meaningful universal default. Enter your own per-acre price if you want a rough land-value or seed/fertilizer cost estimate — otherwise leave it at $0 for a pure acreage figure.
Estimates only. Verify quantities with your supplier before purchasing.