Acreage Calculator

Calculate land area in acres from length and width measurements. Converts to square feet, hectares, square meters, and more.

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How to Calculate Acreage

To find the acreage of a rectangular plot, multiply the length by the width to get the area in square feet, then divide by 43,560 (the number of square feet in an acre).

Formula

Acres = (Length in ft × Width in ft) ÷ 43,560

Example: A plot 330 ft × 264 ft = 87,120 sq ft ÷ 43,560 = 2.0 acres.

Common Lot Sizes in Acres

Dimensions (ft)	Square Feet	Acres
50 × 100	5,000	0.115
100 × 100	10,000	0.230
100 × 200	20,000	0.459
150 × 200	30,000	0.689
208.7 × 208.7	43,560	1.000
330 × 264	87,120	2.000
660 × 330	217,800	5.000
660 × 660	435,600	10.000

Acre Size Comparisons

Comparison	Equivalent
1 acre	About 16 tennis courts
1 acre	About 75% of a football field
1 acre	About 60% of a soccer field
1 acre	About 9 basketball courts
1 acre	About 1.5 city blocks (varies)

Area Unit Conversions

Unit	Equals
1 acre	43,560 sq ft
1 acre	4,840 sq yd
1 acre	4,046.86 sq m
1 acre	0.4047 hectares
1 acre	0.001563 sq mi
1 sq mi	640 acres
1 hectare	2.471 acres

Common Uses

Real estate: Determine lot size for buying or selling land.
Agriculture: Calculate field size for planting, fertilizing, and yield estimates.
Landscaping: Estimate material quantities for large properties.
Property taxes: Verify lot size against assessor records.
Zoning: Check if lot size meets minimum acreage requirements.
Fencing: Calculate perimeter to estimate fencing costs.

Tips for Measuring Land

For irregularly shaped lots, break the area into rectangles and triangles, calculate each, and add them together.
Use a survey or plat map for the most accurate dimensions — pacing or GPS may have significant error.
County assessor websites often list lot size in their property records.
One chain (66 ft) × one furlong (660 ft) = exactly 1 acre — the original definition.

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On conv.awajis.com

Square Feet to Acres Convert measured area to acres.

Frequently Asked Questions

How do I calculate acreage from feet?

Multiply length by width in feet to get square feet, then divide by 43,560, the number of square feet in one acre. A 100 ft by 100 ft lot is 10,000 sq ft, which is 0.2296 acres, just under a quarter acre. For a triangular lot, use 0.5 times base times height in feet, then divide by 43,560.

How big is an acre?

An acre is 43,560 square feet, about the area of a square 208.7 feet on each side. That is roughly 75% of an American football field, which covers 1.32 acres including the end zones. An acre has no fixed shape, so any lot with 43,560 square feet of area counts as one acre. There are 640 acres in a square mile.

What is the difference between an acre and a hectare?

One hectare equals about 2.471 acres. An acre is 43,560 sq ft, or about 4,047 square meters, while a hectare is exactly 10,000 square meters, or about 107,639 sq ft. To convert hectares to acres, multiply by 2.471. To convert acres to hectares, divide by 2.471. Most countries use hectares, while the US uses acres.

How many acres is a quarter section?

A quarter section is 160 acres. It is one quarter of a 640-acre section, and a section equals one square mile. Quarter sections are the standard land subdivision in the US Public Land Survey System, and they are often split further into 40-acre quarter-quarter sections. A quarter section is roughly half a mile on each side.