Area Converter - Square Meters, Square Feet & Acres
Convert land, floor, and surface area across metric and imperial units directly in your browser using exact NIST conversion factors.
🔒 Secure Calculation: Fast and private with zero data stored.
How to Use
- Input your surface, floor, or land area measurement in the "Area value" box above.
- Pick your current unit in the "From" dropdown and the target unit you need in the "To" dropdown.
- Press the swap button (⇄) to switch the two selected units, or click "Sample" to fill a 10 m² test value.
- View your converted area result, the exact conversion formula, and the complete 12-unit reference table below.
Key Features
- Direct two-way conversion across 12 metric, land, and imperial area units.
- Exact NIST SP 811 conversion factors referenced to the international square meter (m²) base unit.
- Side-by-side 12-unit reference table showing equivalent surface and land measurements at a glance.
- Up to 10-decimal precision with automatic scientific notation for extreme scales from mm² to mi².
- Built for real estate appraisal, architectural floor planning, land surveying, and geographic mapping.
- 100% client-side calculation in your browser that never uploads or stores your measurements on any server.
Conversion Formula and Calculation Logic
The area converter converts any starting measurement into square meters (m²)—the standard SI unit for surface area—before dividing by the target unit's exact conversion factor:
Area in Square Meters (m²) = Input Area × Factor to Square Meter Target Area = Area in Square Meters (m²) / Target Unit Factor
Anchoring every calculation to the exact square meter base preserves whole-number imperial relationships—such as 43,560 ft² per acre and 640 acres per square mile—without intermediate rounding errors.
Developed and maintained by the CalcPly team, this converter applies official NIST SP 811 area definitions and ISO 80000-3 geometrical space standards.
Example Input and Output
Example Input
Area value: 10 From unit: Square Meter (m²) To unit: Square Foot (ft²)
Example Output
Converted Result: 107.6391041671 ft² Direct Formula: 10 m² × 10.7639104167 = 107.6391041671 ft² Alternative units: - 15,500.031000062 in² (Imperial / US) - 11.959900463 yd² (Imperial / US) - 0.0024710538 ac (Imperial / US) - 0.000003861 mi² (Imperial / US) - 100,000 cm² (Metric) - 0.1 a (Metric) - 0.001 ha (Metric)
A 10-square-meter floor or land area converts to 107.6391041671 square feet, with instant equivalents in square yards, acres, and hectares.
Frequently Asked Questions
How many square feet are in an acre?
One international acre equals exactly 43,560 square feet (4,840 square yards or 4,046.8564224 square meters). Historically, an acre was defined in medieval England as a strip of land measuring one furlong (660 feet) long by one chain (66 feet) wide, representing the area a yoke of oxen could plow in a single day.
What is the difference between a hectare and an acre?
A hectare is a metric land unit equal to 10,000 square meters (a 100 m × 100 m square), whereas an acre is an imperial unit equal to 43,560 square feet. One hectare equals approximately 2.47105 acres, making a hectare nearly two and a half times larger than a single acre.
Why are linear conversion factors squared when converting area?
Linear factors must be squared because area measures two-dimensional space across both length and width. For example, although 1 yard equals 3 linear feet, a 1-yard-by-1-yard square measures 3 feet by 3 feet, resulting in 9 square feet per square yard (and 10,000 cm² per m²).
What is an are (a) and how does it relate to a hectare?
An are is a metric land measurement equal to 100 square meters (a 10 m × 10 m square) or 0.01 hectares. While the hectare (meaning 100 ares) is used globally for agricultural and forestry plots, the smaller are remains common in real estate and official land records across parts of Europe and Indonesia.
Why does this converter reject negative area values?
Physical surface and land area measures the size of a two-dimensional space and cannot be less than zero. Because multiplying a positive length by a positive width always produces a positive number, the tool only accepts zero and positive values to prevent invalid results.
Are my land measurements or shared links recorded on any server?
No. All area conversions and shareable links are generated locally inside your web browser. Your property figures and unit selections stay entirely on your device with zero server data storage.