Area Converter Free Online
Convert between metric and imperial area units instantly. Supports square millimeters, square centimeters, square meters, square kilometers, square inches, square feet, square yards, square miles, acres, and hectares.
All Conversions
Pro — bulk batch conversion, API access, history & favorites
API access · Priority queue · Team workspace
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How It Works
Enter a Value
Type the number you want to convert into the From input. The conversion runs as you type — no Convert button needed. Decimals and very small or very large numbers are supported via scientific notation.
Pick Source & Target Units
Use the two dropdowns to choose source (From) and destination (To) units. The result updates automatically. Use the swap button to flip the conversion direction in one click.
See All Conversions
Below the main result, the All Conversions panel shows your input value converted into every supported unit at once — perfect for comparing metric vs imperial side by side.
Area Converter Features
Metric Coverage
Full SI metric area: mm², cm², m², km², hectare. All conversions go through square meters as the base unit so no precision is lost.
Imperial Units
Square inch, square foot, square yard, square mile, acre. Uses internationally agreed factors (1 ft = 0.3048 m exactly) so results match NIST/BIPM.
Real-Estate Ready
Hectare and acre are first-class units. Convert farm area in hectares to acres for US/UK reporting, or sq ft to sq m for property listings.
Live Conversion
Result updates on every keystroke. Hold a key, paste a value, or use the swap button to flip units instantly.
One-Click Swap
Flip From and To with a single click. Use it to verify round-trip accuracy or quickly invert a conversion.
100% Private
All math runs locally in your browser. No values are sent to any server, no analytics, safe for confidential property or land calculations.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| All 10 area units | ||
| Live conversion | ||
| All-units result table | ||
| Bulk CSV / Excel conversion | — | |
| REST API access | — | |
| Custom precision settings | — |
Frequently Asked Questions
One acre is exactly 4046.8564224 square meters, or about 4047 m². It is also 0.4047 hectare, 43,560 ft², or about 90% of a standard American football field. The acre comes from the medieval definition of an area one chain (66 ft) by one furlong (660 ft).
A hectare is 10,000 square meters — a square 100 m × 100 m. It is the standard area unit used for land in most of the world (1 ha = 2.4711 acres). Used for farms, forests, parks, and large property surveys.
Multiply square feet by 0.09290304 to get square meters. Example: a 1,500 sq ft apartment = 139.35 m². Divide by 10.7639 to go in the reverse direction.
Factors derived from the International Yard and Pound Agreement (1 inch = 25.4 mm exactly) are exact. Acre and mile derive from the foot, so they are also exact. Display rounds to 8 significant digits for readability.
Yes. The math is precise enough for legal land descriptions, but for official surveys always confirm with a licensed surveyor. The tool is ideal for quick checks, planning, and converting between regional units.