Acreage Calculator – Convert any length and width to acres, square feet, hectares, and square meters — or input an area and have it converted in no time. Add several parcels to total up a whole property, with a live chart of how the land is split.
Work out your land area
Your area, in every unit
| Unit | Value |
|---|---|
| Acres | — |
| Square feet | — |
| Square meters | — |
| Hectares | — |
| Square miles | — |
| Square yards | — |
| Section (640 acres) | — |
At a glance
—
—
—
How this parcel compares
Bars are drawn on a shared scale so you can see how your parcel sits against familiar lot sizes.
Add another parcel
Have more than one tract, field, or lot? Add each one and the tool keeps a running total of the whole holding.
| Parcel | Acres | Sq ft | Remove |
|---|---|---|---|
| Total holding | 0 | 0 |
Why the information is reliable.
Accurate definitions, not educated hunches. The calculator has the international conversions of 43,560 square feet per acre and hectares, square meters and square miles. Internally values are stored in full precision; only rounded when displayed.
Designed for real-world land decisions. The idea is to convert a vague parcel number into a number that you can compare with confidence, whether you’re comparing lot size, planning a build or estimating seed or fencing requirements.
Table of Contents
How many acres are there and how do you calculate them?
An acre is an old measure of land area that predates by many centuries the metric system, and remains in use because it fits conveniently with the way farmland was used to be farmed. The size of one acre is equivalent to 43,560 square feet, 4,840 square yards, or about 4,047 square meters. The traditional picture is a rectangle that is one furlong long and one chain wide, or 660 feet by 66 feet; but an acre is a measure of area, not shape. The area of a square acre would be approximately 208.7 feet per side, and an acre could be an L, a long strip or even a circle.
This is what most confusion begins. However, when people discuss “an acre lot,” what they really mean is the shape of it, and whether or not a house, a driveway, and a septic system will fit on it. The first step is to understand the acreage, the second step is to understand the footprint.
Acreage conversion chart: acres, sq ft, hectares, and more
| Area | Equivalent value | Typical use |
|---|---|---|
| 1 acre | 43,560 sq ft / 4,840 sq yd / 0.4047 ha | Standard residential and rural lot reference |
| 0.25 acre | 10,890 sq ft | Typical suburban lot size |
| 1 hectare | 2.471 acres / 10,000 sq m | Common in metric-country land listings |
| 1 square mile | 640 acres | Useful for large rural land and township checks |
| 1 section | 640 acres | US public land survey reference unit |
To use this acreage calculator for land, lots and parcels:
There are 2 entry points to the tool. The first is for obtaining square footage from a length and width in feet, meters, yards or miles, then dividing by 43,560 to get to acres. It is particularly suitable for rectangular fields, and is a fair approximation for irregular fields using average width. The second mode will take an area you have already been given (as per a deed, tax record, or a survey) and convert it from acres to square feet to square meters to hectares to square miles to square yards.
The results panel, which accompanies the numbers, explains the number. It could be used to determine the number of American football fields (including end zones) that your parcel would occupy (about 1.32 acres each field), the length of one side of a square parcel that is the same size as your parcel, and the value of the land at the acre value you entered. On this chart, you’ll compare your parcel with a quarter acre, a one acre and a five acre plot on a common scale to see right away if it’s a suburban lot or a working field.
Where acreage calculations are used in real life
- Property shopping. Lot sizes are typically quoted in square feet on listings, and acres for listings in the rural areas. If lot lines are not straight, it’s a fair comparison to convert both to a single unit.
- Landscaping and agriculture. The application rate of fertilizer, seed and herbicide are specified on the label in either a per acre basis or 1,000 square feet. When you know the exact area, you know how many bags to purchase and you won’t run out, nor will you have any leftover.
- Fencing and utilities. The cost of perimeter is not proportional to the area. The amount of fencing required can vary widely between two parcels of the same acreage and this is why the side length of an equivalent square is a good approximation when only the acreage is known.
- Real estate and development. Acreage is used in zoning rules, minimum lot size and density calculations. It is also used by the developers to determine if a parcel can be subdivided under local rules and solar developers quote in acres based on land leases.
Examples of land size in the real world: 1/4 acre, 5 acre, 40 acre
- Residential: Quarter-acre lot
- About 10,890 sq ft. A typical reference for suburban houses, small gardens and a narrow driveway.
- Rural: 5-acre parcel
- A large site suitable for a small hobby farm, barn or a rural residence with outbuildings.
- Agriculture: 40-acre field
- About 1,742,400 sq ft. Industrial standard for measuring a large scale agricultural unit and for crop planning.
- Development: 160-acre tract
- Equivalent to 2.5 quarter-sections. Applicable to land subdivision (Solar), site feasibility (Commercial).
Common land conversions worth memorizing
- 1 acre = 43,560 sq ft = 4,840 sq yd = 0.4047 hectares
- 1 hectare = 10,000 sq m = 2.471 acres
- 1 square mile = 640 acres, and one section of the US Public Land Survey is exactly that
- 1 acre = 0.0015625 square miles
- A quarter acre = 10,890 sq ft, the classic suburban lot
The 640-acre section is a good sanity check: if your figure comes out at 700 acres, you’re looking at roughly one section plus a bit, which is a useful reality check before you sign anything.
How to accurately measure acreage, expert tips.
- Do not rely only on the dimension of deeds. Deeds do not always refer to area and recorded dimensions may be more ancient than modern surveys. If the acreage is of financial significance, have it surveyed.
- Observe the units within the numbers. A common error is mixing feet and meters — a 100 m × 200 m field is about 4.94 acres, not 20,000 acres. This tool will convert everything to one unit, and then multiply.
- Use average width for irregular shapes. Measure width in several spots, average the measurements and then multiply by length. If the parcel is very irregular, break up the area into rectangles and triangles, calculate the area of each one, and sum the results.
- Remember topography. On sloped land, there is a difference between aerial-acreage and surface-acreage. For seeding or irrigation calculations, it is the surface area that is important.
- Access and usable area to be checked separately. A ten-acre lot which has a wetland through it may only provide four acres suitable for building. The acreage listed indicates the total acreage, and a plot plan will show the usable space.
Related Tools
FAQ
What is the area of an acre?
The number of square feet in an acre is 43,560. That’s 4,840 square yards or approximately 4,047 square meters. Therefore, a lot that has an area of 0.5 acres is 21,780 square feet.
What area is covered in acres from feet?
Length times width (in feet) equals square feet, which then divided by 43,560 equals acres. A 200 ft × 300 ft lot is 60,000 sq ft, which is about 1.38 acres.
Which is larger an acre or a hectare?
No. The fact that a hectare equals 10,000 square meters (approximately 2.471 acres) makes one hectare approximately two and a half times the size of one acre. Both are prevalent in land listings across countries!
How many acres would be covered by a football field?
An American football field, with both end zones, will take up approximately 1.32 acres. The size of the playing field (excluding the end zone) is approximately 1.1 acres.
Is it possible to use this for odd shaped lots?
Yes, as an approximation. Apply the average width, and use the dimension mode, or divide into simpler shapes, calculate each, and use the parcel list to sum them together.
About this acreage calculator and how the formulas are checked
The A Free Tools team created this calculator and guide, which are designed to create everyday tools for property, finance, and home projects. Formulas are based on the international acre definition (43,560 sq ft, based on the international yard/pound agreement in 1959) and standard SI conversion of hectares to square meters. All tools are checked to published reference tables before they are released and figures are placed in full precision to be rounded at the end. Please report any errors, we will correct them in the next update.
Reviewed by: aFreeTools Editorial Team
Last updated: September 19, 2026
Freshness: Tested against real edge cases — empty input, mixed entity forms, malformed strings
Disclaimer – This acreage calculator is provided for general information and estimation only. Conversion results are rounded for display and may differ slightly from surveyed or legally recorded figures. Do not rely on this tool for property transactions, boundary determinations, land valuation, or legal filings. Always confirm acreage with a licensed surveyor or your county assessor’s records. A Free Tools accepts no liability for decisions made using these results.