Square Feet to Acres
Convert ft² to acre quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.
1 square foot equals about 0.0000229568 acres.
How to use the Square Feet to Acres
- Enter the number you want to convert.
- Confirm the source unit shown beside the input.
- Choose decimal precision if you need more or less detail.
- Read the converted result.
- Copy the result when you need to use it elsewhere.
How the conversion works
1 square foot equals about 0.0000229568 acres.
For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.
Common ft² to acre conversions
| ft² | acre |
|---|---|
| 1 ft² | 0.000023 acre |
| 2 ft² | 0.000046 acre |
| 5 ft² | 0.000115 acre |
| 10 ft² | 0.00023 acre |
| 20 ft² | 0.000459 acre |
| 50 ft² | 0.001148 acre |
Example
For example, entering 1 ft² gives approximately 0.000023 acre using the rule above. Change the input to test your own value.
Frequently asked questions
Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.
Page reviewed: August 24, 2026.