Convert square feet to acres instantly with our precise calculator
ft²
ac
ft²ac
Enter a value to see the conversion
How to Use Our square feet to acres Converter?
1
Enter square feet
Input your measurement in square feet
2
Instant Conversion
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3
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Apply conversions to your projects
Common Square Feet to Acres Conversions
Popular conversion values for quick reference
1 ft²
=
2.30e-05 ac
5 ft²
=
1.15e-04 ac
10 ft²
=
2.30e-04 ac
25 ft²
=
5.74e-04 ac
50 ft²
=
0.00114784 ac
100 ft²
=
0.00229568 ac
Conversion Formula
1 ft² = 0.00002296 ac
To convert square feet to acres, multiply by 0.00002296
Square Feet to Acres Table
Quick reference conversion table
Square Feet (ft²)
Acres (ac)
1 ft²
0.000023 ac
2 ft²
0.000046 ac
3 ft²
0.000069 ac
4 ft²
0.000092 ac
5 ft²
0.000115 ac
6 ft²
0.000138 ac
7 ft²
0.000161 ac
8 ft²
0.000184 ac
9 ft²
0.000207 ac
10 ft²
0.00023 ac
11 ft²
0.000253 ac
12 ft²
0.000275 ac
13 ft²
0.000298 ac
14 ft²
0.000321 ac
15 ft²
0.000344 ac
16 ft²
0.000367 ac
17 ft²
0.00039 ac
18 ft²
0.000413 ac
19 ft²
0.000436 ac
20 ft²
0.000459 ac
Square Feet Related Conversions
Frequently Asked Questions
How do I convert square feet to acres?
To convert square feet to acres, simply enter the value in our calculator above. The conversion is done automatically using the precise conversion factor.
What is the conversion factor from square feet to acres?
The conversion relationship between square feet and acres is calculated using internationally recognized standards for maximum accuracy.
Is this square feet to acres converter free to use?
Yes! Our converter is completely free with no registration required. You can perform unlimited conversions without any restrictions.
How many square feet are in one acre exactly?
One acre contains exactly 43,560 square feet. This is a standardized measurement that has been legally defined in the United States since the 19th century. The acre was originally based on the area that a team of oxen could plow in one day, but today it's precisely defined as 1/640 of a square mile.
How do real estate agents use these conversions?
Real estate agents use square feet to acres conversions for several purposes: listing properties with accurate land measurements, helping buyers understand lot sizes, calculating price per acre vs. price per square foot, and comparing properties of different sizes. For example, a 0.25-acre lot (10,890 sq ft) helps buyers visualize space better than just stating the acreage.
Why do farmers prefer acres over square feet?
Farmers prefer acres because they're more practical for large land areas. A 100-acre farm is easier to conceptualize than 4,356,000 square feet. Agricultural equipment, seed rates, fertilizer applications, and crop yields are all typically calculated per acre. Additionally, government farm programs, land prices, and industry standards all use acres as the standard unit.
What's the difference between US and international acres?
There are slight differences: the International Acre (used in most countries) equals exactly 43,560 square feet, while the US Survey Acre equals approximately 43,560.17 square feet. For practical purposes, this 0.0004% difference is negligible and won't affect typical real estate or agricultural calculations. Our converter uses the standard International Acre.
How do irregular lot shapes affect calculations?
Irregular shapes require careful area calculation before conversion. For simple shapes, break them into rectangles and triangles. For complex boundaries, use GPS mapping tools or hire a surveyor. Once you have the total square footage (regardless of shape), the conversion to acres is straightforward: divide by 43,560. The shape doesn't affect the conversion formula, only the initial area calculation.
How does an acre compare to a football field?
An American football field (without end zones) measures 300 feet × 160 feet = 48,000 square feet, which equals about 1.1 acres. Including the end zones (300 × 200 feet = 60,000 sq ft), a full football field is approximately 1.38 acres. This makes football fields a useful reference point for visualizing acre sizes.
How many houses can fit on one acre?
The number of houses per acre depends on lot size requirements and local zoning. Typical scenarios: High-density suburban: 8-12 houses (3,600-5,400 sq ft lots), Standard suburban: 4-6 houses (7,200-10,800 sq ft lots), Large lots: 2-4 houses (10,800-21,780 sq ft lots). Remember to account for roads, utilities, and common areas in developments.
When should I hire a professional surveyor?
Hire a professional surveyor for: Legal transactions (property sales, boundary disputes), Construction projects requiring precise measurements, Irregular or sloped terrain where GPS isn't accurate, Large commercial developments, Insurance or legal requirements, and When accuracy is critical for high-value decisions. For general planning and estimates, our converter provides sufficient accuracy.
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