How to convert square feet to acres
To convert square feet to acres, multiply the value by the conversion factor 0.0000229568. To go the other way, multiply by 43,560 (or divide by 0.0000229568).
Worked example: 5 ft² to ac
- Write the value: 5 ft²
- Multiply by 0.0000229568: 5 × 0.0000229568
- Result: 0.000114784 ac
Square Foot to Acre conversion table
Quick reference values, rounded to 6 significant digits.
| Square Foot (ft²) | Acre (ac) |
|---|---|
| 0.1 ft² | 0.0000022957 ac |
| 0.25 ft² | 0.0000057392 ac |
| 0.5 ft² | 0.0000114784 ac |
| 1 ft² | 0.0000229568 ac |
| 2 ft² | 0.0000459137 ac |
| 3 ft² | 0.0000688705 ac |
| 4 ft² | 0.0000918274 ac |
| 5 ft² | 0.000114784 ac |
| 6 ft² | 0.000137741 ac |
| 7 ft² | 0.000160698 ac |
| 8 ft² | 0.000183655 ac |
| 9 ft² | 0.000206612 ac |
| 10 ft² | 0.000229568 ac |
| 12 ft² | 0.000275482 ac |
| 15 ft² | 0.000344353 ac |
| 20 ft² | 0.000459137 ac |
| 25 ft² | 0.000573921 ac |
| 30 ft² | 0.000688705 ac |
| 40 ft² | 0.000918274 ac |
| 50 ft² | 0.00114784 ac |
| 75 ft² | 0.00172176 ac |
| 100 ft² | 0.00229568 ac |
| 250 ft² | 0.00573921 ac |
| 500 ft² | 0.0114784 ac |
| 1,000 ft² | 0.0229568 ac |
Acre to Square Foot
| ac | ft² |
|---|---|
| 1 ac | 43,560 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 50 ac | 2,178,000 ft² |
| 100 ac | 4,356,000 ft² |
1 Square Foot in other area & land units
About Square Foot and Acre
What is a square foot (ft²)?
A square foot is the area of a square with 1-foot sides. Flats and apartments in Dhaka are priced per square foot.
What is a acre (ac)?
An acre equals 43,560 square feet or 100 decimal. It is used for agricultural land in Bangladesh, India, the UK and the US.
Important for land buyers: traditional units like katha and bigha differ between districts. This converter uses the standard values used in Dhaka and most official calculations: 1 katha = 720 sq ft, 1 bigha = 20 katha = 14,400 sq ft, 1 decimal (shotok) = 435.6 sq ft, 1 acre = 100 decimal. Always confirm the local value written in your deed (দলিল) or with the land office (AC Land).
Where square foot to acre conversion is used
Area & land conversions are needed for buying and selling land, flats, deed (dolil) records, construction planning and farming. Converting between square feet and acres is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Area & Land Converter.
Frequently asked questions
How many acres are in 1 square foot?
1 Square Foot equals 0.0000229568 ac.
How do I convert square feet to acres?
Multiply the number of square feet by 0.0000229568. For example, 5 ft² × 0.0000229568 = 0.000114784 ac.
What is 5 ft² in ac?
5 ft² = 0.000114784 ac.
How many square feet are in 1 acre?
1 Acre equals 43,560 ft². Use the Acre to Square Feet converter for the reverse direction.
Is this Square Foot to Acre converter accurate?
Yes. It uses exact internationally defined conversion factors and the standard Bangladeshi values for traditional units, calculated with full floating-point precision. Results are displayed rounded for readability.