Area Converter
Convert between 13 area units instantly. Enter a value, pick your units and get the result with the formula, a full conversion table and worked examples.
1 ac in all area units
Updates live as you type. Click a row to set it as the target unit.
| Unit | Symbol | Value |
|---|---|---|
| Circular mil | cmil | 7,986,570,000,000 |
| Square millimetre | mm² | 4,046,860,000 |
| Square centimetre | cm² | 40,468,600 |
| Square metre | m² | 4,046.86 |
| Are | a | 40.4686 |
| Hectare | ha | 0.404686 |
| Square kilometre | km² | 0.00404686 |
| Square inch | in² | 6,272,640 |
| Square foot | ft² | 43,560 |
| Square yard | yd² | 4,840 |
| Guntha | guntha | 40 |
| Acre | ac | 1 |
| Square mile | mi² | 0.0015625 |
How to Convert Area Units
Area is the size of a two dimensional surface. The SI unit is the square metre (m²); land is often measured in hectares, acres or, in India, guntha (one fortieth of an acre).
Every unit on this page is stored as a fixed factor relative to one reference unit, the square metre (m²). Converting is a two step multiply and divide:
- Multiply your value by the factor of the source unit to get the value in m².
- Divide that result by the factor of the target unit.
Acre to Square foot conversion table
| Acre (ac) | Square foot (ft²) |
|---|---|
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 3 ac | 130,680 ft² |
| 4 ac | 174,240 ft² |
| 5 ac | 217,800 ft² |
| 6 ac | 261,360 ft² |
| 7 ac | 304,920 ft² |
| 8 ac | 348,480 ft² |
| 9 ac | 392,040 ft² |
| 10 ac | 435,600 ft² |
| 15 ac | 653,400 ft² |
| 20 ac | 871,200 ft² |
| 25 ac | 1,089,000 ft² |
| 30 ac | 1,306,800 ft² |
| 40 ac | 1,742,400 ft² |
| 50 ac | 2,178,000 ft² |
| 75 ac | 3,267,000 ft² |
| 100 ac | 4,356,000 ft² |
| 250 ac | 10,890,000 ft² |
| 500 ac | 21,780,000 ft² |
| 1,000 ac | 43,560,000 ft² |
Area Units and Conversion Factors
Value of one unit expressed in m².
| Unit | Symbol | In m² |
|---|---|---|
| Circular mil | cmil | 5.067074791 × 10−10 |
| Square millimetre | mm² | 0.000001 |
| Square centimetre | cm² | 0.0001 |
| Square metre | m² | 1 |
| Are | a | 100 |
| Hectare | ha | 10,000 |
| Square kilometre | km² | 1,000,000 |
| Square inch | in² | 0.00064516 |
| Square foot | ft² | 0.09290304 |
| Square yard | yd² | 0.83612736 |
| Guntha | guntha | 101.1714106 |
| Acre | ac | 4,046.856422 |
| Square mile | mi² | 2,589,988.11 |
Frequently Asked Questions
What is the SI unit of area?
The SI unit of area is the square metre (m²). Area is the size of a two dimensional surface.
How do I convert ft² to m²?
To convert square foot (ft²) to square metre (m²), multiply the value in ft² by 0.092903. For example, 1 ft² = 0.092903 m².
How do I convert m² to ft²?
To convert square metre (m²) to square foot (ft²), multiply the value in m² by 10.7639. For example, 1 m² = 10.7639 ft².
How do I convert ac to ha?
To convert acre (ac) to hectare (ha), multiply the value in ac by 0.404686. For example, 1 ac = 0.404686 ha.
Can I see a value in every area unit at once?
Yes. Enter a value and choose the source unit; the "all units" table below the converter instantly lists the equivalent in all 13 supported units. Click any row to make it the target unit.
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