Area Converter

Converts area across cm², m², hectares, km², pyeong, ft², acres and square miles. The units least amenable to mental arithmetic — an acre is 4,046.86 m², a pyeong 3.3058 m², a hectare exactly 10,000 m² — handled in one grid.

How to use

1. Enter an area in any unit.
2. Read the rest as they update.
3. For land listings, check which unit the source uses before comparing prices.
4. Remember square units scale by the square: 1 m = 100 cm, but 1 m² = 10,000 cm².

When you actually need this

• Comparing apartment sizes quoted in m², ft² and pyeong across markets.
• Converting farmland or plot sizes between acres and hectares.
• Working out a room's m² from feet-based dimensions.
• Translating a per-m² price into a per-pyeong or per-ft² one.

The square trap, and unit origins

Length intuition fails on areas because factors square: a metre is 3.28 feet but a square metre is 10.76 square feet, and doubling a room's side quadruples its floor. The hectare is the clean one — a 100 m square, exactly 10,000 m², 100 of them to the km². The acre began as a day's ox ploughing and settled at 4,046.86 m², about 40% of a hectare. The pyeong, 400/121 ≈ 3.3058 m², persists in Korean property talk despite metric law; two tatami mats is the physical intuition. Real-estate caution: quoted areas differ by what they include — supply versus exclusive area in Korea, lot versus floor area elsewhere — so match definitions before comparing numbers.

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FAQ

How precise are the conversion factors in Area Converter?

The factors are the internationally defined exact values — one inch is exactly 25.4 millimetres, one pound is exactly 0.45359237 kilograms, and so on. Results are computed at full floating-point precision and only rounded for display.

Can I convert between metric and imperial units in both directions?

Yes. Enter a value in any field and every other unit updates at once, so the conversion works in either direction without switching modes or pressing a button.

Why does the last decimal place sometimes look off?

Because many conversions are irrational in decimal form and browsers use binary floating point, the final digit can differ by a tiny amount. The displayed value is rounded sensibly for everyday use; for laboratory or engineering work, carry the unrounded figure through your own calculation.