Acre Calculator (USA)
Find out how many acres a lot is from its length and width, or convert any area straight into acres. Instantly see square feet, square meters, hectares and more — plus an estimated land value.
Acres = (length × width) ÷ 43,560 sq ft.
Enter a market price per acre to estimate the parcel's total value.
| Unit | Value |
|---|---|
| Calculate to see all conversions | |
How to use the acre calculator
Three quick steps turn a lot’s length and width — or any area figure you already have — into acres, with square feet, square meters, hectares, an estimated land value, and a downloadable PDF.
Pick how you’re calculating
Start from lot dimensions, or switch to convert an area you already know into acres.
Enter the measurements
Length and width in feet, yards, or meters — or an area in sq ft, sq m, sq yd, hectares, or sq miles.
Add a price per acre
Optional. Enter a market rate and the calculator estimates what the parcel is worth.
Read results & save a PDF
Acreage, every unit conversion, a to-scale lot diagram, and a report you can download.
How acreage is calculated
Every acre calculation comes down to one division. Get the lot into square feet, divide by 43,560, and everything else — hectares, square meters, land value — follows from that single figure. Here is the exact math.
Worked example — a 200 × 150 ft lot
Area: 200 × 150 = 30,000 sq ft
Acres: 30,000 ÷ 43,560 = 0.689 acres
Hectares: 0.689 × 0.4047 = 0.279 ha
As a square: √30,000 ≈ 173 × 173 ft
≈ 0.689 acres — just over two thirds of an acre, or 2,787 square meters.
Acre conversion charts
The lookups that come up most when sizing a lot — common dimensions in acres, what one acre equals in every unit, how to picture each acreage, and the conversions worth memorising.
| Lot size | Square feet | Acres | Hectares |
|---|---|---|---|
| 50 × 100 ft | 5,000 sq ft | 0.115 ac | 0.046 ha |
| 60 × 120 ft | 7,200 sq ft | 0.165 ac | 0.067 ha |
| 80 × 125 ft | 10,000 sq ft | 0.230 ac | 0.093 ha |
| 100 × 150 ft | 15,000 sq ft | 0.344 ac | 0.139 ha |
| 150 × 145 ft | 21,750 sq ft | 0.499 ac | 0.202 ha |
| 200 × 150 ft | 30,000 sq ft | 0.689 ac | 0.279 ha |
| 208.7 × 208.7 ft | 43,560 sq ft | 1.000 ac | 0.405 ha |
| 300 × 435 ft | 130,500 sq ft | 2.996 ac | 1.212 ha |
A square acre is 208.7 feet on each side, but acres come in every shape — a long narrow parcel and a square one can hold identical acreage.
| Unit | 1 acre equals | Where you’ll see it |
|---|---|---|
| Square feet | 43,560 sq ft | US lot sizes and listings |
| Square yards | 4,840 sq yd | Older deeds and surveys |
| Square meters | 4,046.86 sq m | Metric plans and drawings |
| Hectares | 0.4047 ha | International land listings |
| Square kilometers | 0.004047 sq km | Large tracts and mapping |
| Square miles | 0.0015625 sq mi | Ranches and sections |
| Square inches | 6,272,640 sq in | Rarely — but the math holds |
The calculator lists all of these at once in the all-unit conversions table, so you can copy whichever basis a listing or plan is quoted in.
| Convert | Multiply / divide | Why it comes up |
|---|---|---|
| Sq ft → acres | ÷ 43,560 | The core acre calculation |
| Sq m → acres | ÷ 4,046.86 | Metric survey to US acreage |
| Sq yd → acres | ÷ 4,840 | Reading an older deed |
| Hectares → acres | × 2.471 | Sizing an overseas listing |
| Acres → hectares | × 0.4047 | Quoting a US parcel abroad |
| Sq miles → acres | × 640 | Ranch and section acreage |
Match the price basis to the area unit before comparing rates — a per-hectare figure looks roughly 2.5× a per-acre figure for identical land.
| Acreage | Square feet | Rough comparison |
|---|---|---|
| 0.1 acre | 4,356 sq ft | Compact city lot |
| 0.25 acre | 10,890 sq ft | Typical suburban lot |
| 0.5 acre | 21,780 sq ft | Large suburban lot |
| 1 acre | 43,560 sq ft | ~¾ of a football field |
| 2.5 acres | 108,900 sq ft | ~2 football fields |
| 5 acres | 217,800 sq ft | Small hobby farm |
| 10 acres | 435,600 sq ft | ~7.6 football fields |
| 640 acres | 27.9M sq ft | One square mile (a section) |
The calculator shows the same comparison live — football fields, basketball courts, and tennis courts — as you change the dimensions.
| Reference | Playing area | Acres | Per acre |
|---|---|---|---|
| Football field | 57,600 sq ft | 1.32 ac | 0.76 |
| Basketball court | 4,700 sq ft | 0.108 ac | 9.3 |
| Tennis court | 2,808 sq ft | 0.064 ac | 15.5 |
Football field figures include both end zones (360 × 160 ft). One acre fits about three quarters of a field, nine basketball courts, or 16 tennis courts.
All four footprints hold exactly 43,560 square feet. Shape changes nothing about the acreage — but it changes almost everything about how the land can be used.
- Frontage beats acreage — a 66 ft wide strip and a 208.7 ft square are both one acre, but only one of them fits a standard house across the front.
- The odd number has a reason — one chain by one furlong was a day’s plowing for a team of oxen, and 66 × 660 is where 43,560 comes from.
- Irregular lots need splitting — this calculator assumes a rectangle, so measure odd parcels in rectangular pieces and add the acreages.
Everything the calculator works out
One length and width gives you the full picture — the acreage, the same land in every unit, a size you can actually picture, and what it’s worth at your rate.
The figures behind every acre calculation
Built for anyone sizing up a lot
A listing you’re checking, a parcel you’re pricing, or a plan you’re reading in meters — the same two measurements answer all three.
Turning a listing’s lot dimensions into acres to compare properties fairly, and to see whether “large lot” actually means large.
- Convert every lot to the same unit
- Compare against the 0.25 acre benchmark
- Check the plat for the real boundary
Working out the acreage behind an asking price so two parcels quoted on different bases can be compared on the same footing.
- Divide asking price by acreage
- Convert hectare quotes to acres
- Verify acreage before you offer
Quoting acreage accurately in a listing, or reading a metric site plan and needing the figure in acres for a US audience.
- Switch the input unit to meters
- Quote both acres and sq ft
- Save the PDF for the file
7 tips for getting acreage right
Small habits that keep an acre estimate honest — and stop you paying for land that isn’t there.
Acre calculator FAQ
The acreage, conversion, and land value questions people ask most when they’re sizing up a lot.
One acre is exactly 43,560 square feet. To convert any area to acres, work out the square footage and divide by 43,560.
A square acre measures about 208.7 ft on each side, though acres come in every shape — a long narrow strip and a perfect square can hold identical acreage.
Multiply length by width to get square feet, then divide by 43,560. A lot measuring 200 by 150 feet is 30,000 square feet, which comes to about 0.689 acres.
If your measurements are in yards or meters, set the dimension unit first — the calculator converts to feet before it divides, so one yard counts as 3 feet and one meter as 3.281 feet.
An acre is roughly three quarters of an American football field including the end zones, about nine basketball courts, or around 16 tennis courts.
In housing terms, a typical quarter-acre suburban lot is 10,890 sq ft, so four of those make one acre.
A 100 by 150 foot lot is 15,000 square feet, which works out to 0.344 acres — a little over a third of an acre, or 0.139 hectares.
Most quarter-acre suburban lots fall between 80 × 125 and 100 × 110 feet, so a 100 × 150 lot sits comfortably above the typical subdivision size.
One hectare is 10,000 square meters, which equals about 2.471 acres. Going the other way, one acre is roughly 0.4047 hectares.
Hectares are the standard land unit across most of the world while acres remain standard in the United States, so cross-market listings often quote both.
The number is a leftover from medieval farming units. An acre was the land a team of oxen could plow in a day: one chain wide by one furlong long, or 66 × 660 ft.
Multiply those and you get 43,560 square feet — which is why the figure looks arbitrary today even though it’s exact.
Multiply the acreage by the going rate per acre for comparable land nearby. At $50,000 an acre, a 0.689 acre lot comes to roughly $34,400.
Rural land is usually quoted per acre, urban lots per square foot, and metric markets per hectare, so convert until the rate and the area share the same basis. Frontage, access, utilities, zoning, and topography move the rate far more than raw acreage does.
No. This is a planning estimate calculated from the dimensions you enter, treating the lot as a clean rectangle. Real boundaries curve, jog, and follow natural features, and legal descriptions are written from measured bearings and distances.
For a deed, a mortgage, a boundary dispute, or a subdivision application you need a licensed surveyor’s plat. Use this to sanity-check a listing or size up a parcel before that stage.
Not a Survey — Planning Estimate Only: This calculator converts the dimensions or area you enter into acres and other units, treating the lot as an idealized rectangle. Actual boundaries are established only by a licensed surveyor and the recorded plat or legal description, and results here carry no legal standing for deeds, financing, boundary disputes, subdivision, or permitting. The acreage shown is gross area and makes no allowance for setbacks, easements, right-of-way, floodplain, or environmental restrictions — confirm those with your local planning or zoning department. Land value is a simple rate multiplication and is not an appraisal; access, utilities, zoning, topography, and frontage materially affect real market value. For planning purposes only.