Acre Calculator

Turn a lot’s length × width into acres, then see any acre size drawn to scale on a real map.

1.377 acres
= 60,000 sq ft · 0.557 ha · 5,574.182 m²

Length × width ÷ 43,560 = acres.

Irregular or multi-sided plot? Draw it point-by-point on our Area Calculator

How big is an acre?

One acre = 43,560 square feet = 4,046.86 m² = 0.4047 hectares, about 76% of an American football field including end zones.

An acre has no required shape; it is simply an area. Laid out as a square it measures about 208.7 feet on each side. And 640 acres = 1 square mile (a survey “section”).

The interactive map on this page draws that area to true scale wherever you place it, so you can compare an acre against a block, a parking lot, or a field you already know. See the acre glossary entry for the definition, or the use cases for where this comes in handy.

5 acre square overlay placed over a suburban street grid to show how big 5 acres is
A 5-acre square overlaid on a suburban lot grid, sized to scale with the acre calculator above. · Map data © OpenStreetMap contributors

How to calculate acres from a lot’s size

Enter your plot’s length and width in the calculator at the top of the page (in feet, meters, or yards) and it multiplies them, then divides by 43,560 to give the area in acres, along with square feet, hectares, and m². A 200 ft × 300 ft lot, for example, is 60,000 sq ft ÷ 43,560 ≈ 1.38 acres. That works for any rectangular parcel; for an irregular or multi-sided plot, trace it point-by-point on the Area Calculator.

See any acre size on the map

1

Find a place

Search an address or tap the map

2

Set the size

Type a value; pick acres, ha, ft² or m²

3

Pick a shape

Square or circle overlay

4

Drag to compare

Line it up against a known landmark

5

Share it

Copy a link that restores the view

What an acre compares to

≈ 76%

of an American football field, including both end zones (a field is 57,600 sq ft ≈ 1.32 acres).

≈ 15½

doubles tennis courts (each 78 × 36 ft = 2,808 sq ft) fit inside one acre.

640

acres make one square mile, the survey “section” that divides much of US farmland.

AcresSquare feetSquare metersHectares≈ Football fields
0.2510,8901,0120.1010.19
143,5604,0470.4050.76
5217,80020,2342.023.78
10435,60040,4694.057.56
401,742,400161,87416.1930.25
1004,356,000404,68640.4775.6
64027,878,4002,589,990259484

Football-field comparisons use a full field including end zones (360 × 160 ft = 57,600 sq ft). Figures are rounded from 1 acre = 43,560 sq ft = 4,046.86 m² = 0.4047 hectares.

Square or circle: the area is the same

An acre is a measure of area, not a shape, so the overlay can be drawn either way and still cover the same 43,560 square feet:

Square

A one-acre square is about 208.7 ft on each side. Squares line up naturally with parcels, city blocks, and the section grid, so they are easy to compare against property lines.

Circle

A one-acre circle has a radius of about 117.75 ft (117.75² × π ≈ 43,560 sq ft). Circles are handy for “how far from this point” framing, like a setback or a buffer around a building.

Frequently Asked Questions

How do I calculate acres from length and width?
Multiply length by width to get the area in square feet, then divide by 43,560 (the number of square feet in an acre). For example, a 200 ft × 300 ft lot is 60,000 sq ft ÷ 43,560 ≈ 1.38 acres. The calculator above does this instantly in feet, meters, or yards.
How many square feet are in an acre?
One acre is exactly 43,560 square feet. To convert square feet to acres, divide by 43,560; to go from acres to square feet, multiply by 43,560. An acre is also 4,046.86 m² or 0.4047 hectares.
How do I calculate the acreage of a lot?
For a rectangular lot, measure the length and width, multiply them for the area, then divide square feet by 43,560 to get acres. For an irregular or many-sided lot, trace the boundary point-by-point on our Area Calculator, which sums the true area for any shape.
How big is 1 acre?
One acre is 43,560 square feet, or 4,046.86 m², or 0.4047 hectares. As a square that is about 208.7 feet on each side, and it covers roughly 76% of an American football field including the end zones.
Is an acre 200 by 200 feet?
No. A one-acre square is about 208.7 feet on each side, not 200. A 200 × 200 ft lot is 40,000 square feet, which is roughly 0.92 acre, about 8% short of a full acre (43,560 sq ft). You need about 208.7 × 208.7 feet to make exactly one acre as a square.
What does 5 acres look like?
5 acres is 217,800 square feet, a square about 467 feet on each side, or close to 3.8 American football fields laid side by side.
How big is 10 acres?
10 acres is 435,600 square feet, a square roughly 660 feet on each side (an eighth of a mile), about 7.6 football fields.
How many acres are in a square mile?
There are 640 acres in one square mile, a block surveyors call a "section." The classic 40-acre "back forty" is one sixteenth of a section: a quarter-mile square.
How many acres is a football field?
An American football field including both end zones is 360 by 160 feet, or 57,600 square feet, about 1.32 acres. So a single acre covers roughly three-quarters of the field.
How do I measure acres on a map with this tool?
Search an address or tap the map to drop a true-scale overlay, then set the size in acres, hectares, square feet, or square metres. Switch the overlay between a square and a circle, drag it to line it up against a landmark you know, and copy a link to share the exact view.

More Map Tools

Area Calculator

Draw a shape and measure its area

Radius Map

Draw circles on any map by distance

Distance Calculator

Measure between two points

Zip Code Radius

Find all zip codes within a radius

KM Radius Map

Draw radius circles in kilometers

Geofence Map

Draw and label coverage zones

Use Cases

Real estate, delivery, land & more

← Main radius tool·What is an acre?·Use cases·Measure any area →