Convert acres to square feet
PrintAcre to Square Feet Conversion Table
| Acre (ac) | Square Feet (sq ft) |
|---|---|
| 0.01 acre | 435.6 sq ft |
| 0.1 acre | 4,356 sq ft |
| 1 acre | 43,560 sq ft |
| 2 acres | 87,120 sq ft |
| 5 acres | 217,800 sq ft |
| 10 acres | 435,600 sq ft |
| 20 acres | 871,200 sq ft |
| 50 acres | 2,178,000 sq ft |
| 100 acres | 4,356,000 sq ft |
Acres and square feet are the two primary units used in real estate listings, land surveying, property tax assessments, agricultural farming, and construction development across the United States, Canada, the United Kingdom, and India. While smaller property boundaries, home interior floor plans, and building footprints are measured in square feet (sq ft), large residential lots, farms, commercial developments, and tracts of land are measured in acres (ac).
Our free online Acres to Square Feet Converter provides instant, high-precision land area conversions in both directions:
- Acres to Square Feet: Multiply acres by
43,560(exact international standard). - Square Feet to Acres: Divide square feet by
43,560(or multiply by0.0000229568).
Exact Area Conversion Formulas: Acres & Square Feet
Since the International Yard Agreement of 1959, one international acre is defined as exactly 43,560 square feet (or 4,046.856 square meters). This number originates historically from Gunter’s surveying chain: 1 acre equals the area of 1 chain (66 feet) by 1 furlong (660 feet): 66 × 660 = 43,560 sq ft.
| Conversion Direction | Exact Mathematical Formula | Quick Mental Approximation Rule |
|---|---|---|
| Acres to Square Feet | Square Feet = Acres × 43,560 |
Multiply acres by 43,500 (e.g., 2 acres × 43,500 = 87,000 sq ft). |
| Square Feet to Acres | Acres = Square Feet ÷ 43,560 |
Divide sq ft by 43,560 (e.g., 100,000 sq ft ÷ 43,560 = 2.3 acres). |
Step-by-Step Calculation Example
To convert 15 acres to square feet:
15 acres × 43,560 = 653,400 square feet
Thus, 15 acres is equal to exactly 653,400 sq ft.
Acre to Square Foot Conversion Table
Below is a handy reference lookup table for converting property lot sizes and land parcels from 0.01 acres up to 1,000 acres:
| Acres (ac) | Square Feet (sq ft / ft²) | Real Estate & Land Plot Benchmark |
|---|---|---|
| 0.01 ac | 435.6 sq ft | Small 2-car garage footprint |
| 0.10 ac | 4,356.0 sq ft | Compact urban residential lot |
| 0.25 ac | 10,890.0 sq ft | 1/4 Acre (Standard suburban single-family home lot) |
| 0.50 ac | 21,780.0 sq ft | 1/2 Acre (Spacious suburban lot with yard) |
| 0.75 ac | 32,670.0 sq ft | 3/4 Acre residential lot |
| 1.00 ac | 43,560.0 sq ft | 1.0 Acre Exact Benchmark (~208.71 ft × 208.71 ft square) |
| 1.10 ac | 48,000.0 sq ft | American Football field (playing area without end zones) |
| 1.32 ac | 57,600.0 sq ft | American Football field total area (including end zones) |
| 2.00 ac | 87,120.0 sq ft | 2-acre estate lot |
| 5.00 ac | 217,800.0 sq ft | 5-acre hobby farm / equestrian lot |
| 10.00 ac | 435,600.0 sq ft | 10-acre rural homestead parcel |
| 50.00 ac | 2,178,000.0 sq ft | 50-acre agricultural farm plot |
| 640.00 ac | 27,878,400.0 sq ft | 1 Square Mile (Section of land) |
History & Land Surveying: The Origin of the Acre
Medieval Origins: Oxen and Wooden Plows
In Middle Ages Europe, an acre (derived from Old English æcer and Germanic akker, meaning open field) was defined as the area of land a farmer using a yoke (pair) of oxen could plow in a single day. Because plowing with oxen was strenuous work, fields were shaped long and narrow to minimize turns. A standard day’s plow strip was 1 Gunter’s chain (66 feet wide) by 1 furlong (“furrow-long” or 660 feet long), creating the exact 43,560 square foot area used today.
Gunter’s Chain and Modern Surveying
In 1620, English mathematician Edmund Gunter invented the 66-foot surveying chain divided into 100 links. In Gunter’s surveying system, 10 square chains equaled 1 acre (10 × 66 ft × 66 ft = 43,560 sq ft). In 1959, international standards locked the international yard to 0.9144 meters, standardizing 1 international acre as 43,560 sq ft (4,046.856 m²).
To calculate land area, visit our Area Calculator. For square meter and metric land conversions, check our Square Meters to Square Feet Converter. For general unit transformations, explore our Conversion Calculator.
Frequently Asked Questions (FAQ)
How many square feet are in 1 acre?
There are exactly 43,560 square feet in 1 international acre.
How many square feet are in a quarter acre (1/4 acre)?
A quarter acre (0.25 ac) equals 43,560 ÷ 4 = 10,890 square feet.
How big is a 1-acre square lot in feet?
A square lot measuring 1 acre has sides equal to the square root of 43,560, which is approximately 208.71 feet by 208.71 feet.
How many acres is an American football field?
An American football field (300 ft × 160 ft = 48,000 sq ft without end zones) equals 1.10 acres. With both end zones included (360 ft × 160 ft = 57,600 sq ft), it equals 1.32 acres.