About Area Converter
Convert between common area-converter units instantly. Free online converter. Free, no sign-up required.
How to use
- Type your area value into the Value field at the top of the converter. Decimals are accepted, so 2.5 acres or 0.75 hectares both work — the result updates the moment you finish typing.
- Pick the source unit from the From dropdown. Options include square meters (m²), square kilometers, square feet, square yards, square miles, acres, hectares, and square inches.
- Choose the target unit in the To dropdown. The default pairing is m² to ft², but any combination works — useful when comparing imperial real estate listings to metric land surveys.
- Use the swap button between the dropdowns to instantly reverse direction. This is handy for round-tripping a value (acres to hectares, then back) to verify a calculation.
- Read the converted value in the highlighted result box. Very small numbers automatically switch to scientific notation so you do not lose precision when converting square miles down to square inches.
- For land area math, remember the building blocks: 1 acre = 4,046.86 m² = 43,560 ft², and 1 hectare = 10,000 m² = 2.471 acres. These pop up constantly in surveying and farming.
Examples
Suburban lot in two systems
A 0.25 acre residential lot converts to roughly 1,011.71 m² or 10,890 ft². That is a quarter-acre rule of thumb you will see on listing sheets and zoning notices across North America.
Hectare to football field
1 hectare equals 10,000 m² or about 107,639 ft² — close to but slightly larger than a regulation soccer pitch. Farms and forestry parcels in Europe and Canada commonly report area in hectares for this reason.
Square miles to km²
A 50 mi² county park converts to 129.5 km². The factor is 2.59 km² per square mile, which compounds quickly: a state covering 100,000 mi² spans roughly 259,000 km².
Frequently asked questions
How do I convert square feet to square meters?
Multiply square feet by 0.092903 to get square meters. So 1,000 ft² × 0.0929 ≈ 92.9 m². Going the other way, multiply m² by 10.7639. The factor comes from squaring the linear conversion (1 ft = 0.3048 m, so 1 ft² = 0.3048² m² = 0.09290304 m²). It applies to any rectangular or irregular area you have already calculated in square feet.
How many square feet are in an acre?
Exactly 43,560 ft². That equals 4,046.86 m² or about 0.4047 hectares. The acre originated as the area a yoke of oxen could plow in a day — historically defined as 1 chain (66 ft) by 1 furlong (660 ft). It survives today in US, UK, and Canadian real estate, and as the standard unit on most farm deeds in the English-speaking world.
What is the difference between square feet and linear feet?
Linear feet measure length in one dimension (a 10-ft board is 10 linear ft). Square feet measure surface area in two dimensions (a 10 ft × 10 ft room is 100 ft²). When ordering flooring, paint, or wallpaper, always calculate length × width to get square footage. Mixing the two is a classic estimation error that leads to ordering 10× too much (or too little) material.
How big is a hectare versus an acre?
1 hectare = 2.471 acres, or roughly 2.5 acres for back-of-envelope estimates. A hectare is a metric unit (1 hm² = 100 m × 100 m = 10,000 m²) used widely in agriculture, forestry, and land management outside the US. Canadian farmland sales sometimes list both: an 80-hectare quarter section is about 197.7 acres, very close to the historical 160-acre homestead.
Why does my property survey use different units than my real estate listing?
Surveys are often recorded in the legal unit of record for the jurisdiction (square meters in metric countries, square feet or acres in the US, hectares in Canadian rural deeds), while listings round to the unit consumers expect. A US listing might say “0.5 acre lot” while the actual survey reports 21,780 ft² or 2,023.4 m² — same area, three different conventions.
Are area conversions exact or approximate?
Conversions between metric units (m², km², hectares) are exact powers of 10. Imperial-to-metric conversions are exact by international agreement: 1 ft = 0.3048 m exactly, so 1 ft² = 0.09290304 m² exactly. Acres and hectares are also exact-by-definition. The only place rounding shows up is in your displayed digits — the underlying math uses double-precision floats good to about 15 significant figures.
What is a square kilometer used for?
Square kilometers (km²) appear in geography, climate, and large-scale environmental data: forest cover, watershed area, country and city footprints. 1 km² = 100 hectares = 247.1 acres = 0.386 mi². New York City covers about 783 km²; the contiguous US spans roughly 8 million km². For anything bigger than a farm, km² (or mi² in the US) is the practical unit.
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