Free Area Converter
Convert area units instantly — square meters, square feet, acres, hectares, square kilometers, and more. Free, symmetrical, no sign-up.
Exact Conversion Formula & Multipliers
Area conversions square the underlying length ratios: 1 acre = 4,046.8564224 square meters (a legally defined exact value based on the surveyor's chain), 1 hectare = 10,000 square meters exactly, and 1 square mile = 2.589988110336 square kilometers. Because area scales with the square of length, a small rounding difference in a linear unit becomes roughly twice as large once squared — which is why this converter carries full decimal precision rather than rounding intermediate steps.
Practical Real-World Scenarios
- Real estate: property listings in the US quote square feet while most of the world uses square meters, and land parcels are frequently deeded in acres or hectares.
- Agriculture: farm size is measured in acres in the US and UK but hectares almost everywhere else, affecting how yield-per-area statistics are compared internationally.
- Urban planning and construction: floor-area-ratio and zoning calculations often require converting between square feet, square meters, and acres within a single project document.
Historical & Technical Background
The acre originated as the amount of land a yoke of oxen could plow in a day, making it a practical rather than mathematical unit — which is why it doesn't convert to square feet in a round number. The hectare, by contrast, is purely metric: exactly 100 meters by 100 meters, chosen for administrative and agricultural record-keeping after the metric system's adoption. Both units persist today because land records, deeds, and agricultural statistics are rarely re-surveyed once established, so old and new systems coexist indefinitely.
Precision & Accuracy Statement
Every conversion factor used on this page is checked against internationally recognized reference standards — NIST Handbook 44 and BIPM SI derived-unit definitions — rather than approximated or rounded for display. Where a constant is fixed by international definition (such as 1 inch = 2.54 cm, or standard gravity = 9.80665 m/s²), we use the exact defined value. Where a figure is a practical industry convention rather than a physical constant, that distinction is stated explicitly above so results are never presented with false precision.
How This Converter Works
Area units vary widely by context — square meters and hectares for land in metric countries, acres and square feet in the US and UK. Our converter handles 10 area units simultaneously.
Common Conversions
| Square Meters | Square Feet | Context |
|---|---|---|
| 1 m² | 10.764 ft² | Small room floor area |
| 100 m² | 1,076.4 ft² | Average apartment |
| 4,047 m² | 43,560 ft² | One acre |
| 10,000 m² | 107,639 ft² | One hectare |
| 2,590,000 m² | 27,878,400 ft² | One square mile |