Area Converter

Convert square meters, square feet, acres, hectares, square miles and more with exact factors.

How area conversion works

Area units are squared length units, which is why their factors look extreme: a square mile contains over 2.5 million square meters. Metric land measurement favors the hectare (10,000 m²), while real estate in the US and UK uses acres and square feet.

Unit	Equals
1 Square centimeter (cm²)	0.0001 m²
1 Square meter (m²)	base unit
1 Hectare (ha)	10000 m²
1 Square kilometer (km²)	1000000 m²
1 Square inch (in²)	0.00064516 m²
1 Square foot (ft²)	0.092903 m²
1 Square yard (yd²)	0.836127 m²
1 Acre (ac)	4046.86 m²
1 Square mile (mi²)	2589990 m²

All area conversions

Every area pair has its own quick-reference page with a conversion table:

cm² to m² cm² to ha cm² to km² cm² to in² cm² to ft² cm² to yd² cm² to ac cm² to mi² m² to cm² m² to ha m² to km² m² to in² m² to ft² m² to yd² m² to ac m² to mi² ha to cm² ha to m² ha to km² ha to in² ha to ft² ha to yd² ha to ac ha to mi² km² to cm² km² to m² km² to ha km² to in² km² to ft² km² to yd² km² to ac km² to mi² in² to cm² in² to m² in² to ha in² to km² in² to ft² in² to yd² in² to ac in² to mi² ft² to cm² ft² to m² ft² to ha ft² to km² ft² to in² ft² to yd² ft² to ac ft² to mi² yd² to cm² yd² to m² yd² to ha yd² to km² yd² to in² yd² to ft² yd² to ac yd² to mi² ac to cm² ac to m² ac to ha ac to km² ac to in² ac to ft² ac to yd² ac to mi² mi² to cm² mi² to m² mi² to ha mi² to km² mi² to in² mi² to ft² mi² to yd² mi² to ac

Back to the full unit converter for all seven categories.

Common mistakes to avoid

Mixing up ounces. The Weight category uses the ounce (oz), a unit of mass (28.3495 g). The Volume category uses the US fluid ounce (fl oz), a unit of capacity (29.5735 mL). One fluid ounce of water weighs about 1.04 oz, not exactly 1 oz, so always confirm which category you are in before converting.
Confusing bits and bytes. File sizes are measured in bytes, network speeds in bits. In Data storage, 1 byte equals 8 bits, so a 100 Mbit per second connection transfers at most 12.5 megabytes per second.
Assuming imperial gallons. Every volume unit here is US customary: 1 US gallon is 3.785 liters. A UK imperial gallon is 4.546 liters, roughly 20 percent larger, so results will not match UK fuel economy figures.

A quick accuracy check

Want to sanity-check any converter? Convert -40 from Celsius to Fahrenheit: the result must be exactly -40, the only temperature where the two scales meet. Then convert 0 Kelvin to Celsius: you should get -273.15, absolute zero. A converter that handles both edge cases correctly has sound temperature formulas, and this one does.

Frequently asked questions

How many square feet are in an acre?

Exactly 43,560 square feet. An acre is about 4,046.86 square meters, or 0.4047 hectares — historically the area a team of oxen could plow in a day.

What is the difference between a hectare and an acre?

A hectare is metric: 10,000 m², a square of 100 m × 100 m. An acre is imperial: 43,560 ft² ≈ 4,047 m². One hectare equals about 2.471 acres.