Area Converter

Area measures two-dimensional space, with the square meter (m²) as the SI unit. The “square” is the part that catches people out, because area grows with the square of length, not in step with it.

Key relationships:

• 1 m² = 10,000 cm²
• 1 km² = 1,000,000 m²
• 1 ft² = 0.092903 m²
• 1 acre = 4,046.86 m²
• 1 hectare = 10,000 m²

For a sense of scale:

• A tennis court: about 261 m²
• A soccer pitch: about 7,140 m² (1.76 acres)
• An American football field: about 5,350 m² (1.32 acres)

The squaring is genuinely counterintuitive. Double the side of a room and you don’t double the floor, you quadruple it, because both length and width grew. A pizza of twice the diameter holds four times the food. It’s the most common estimating mistake people make with paint, flooring, turf, and tile, and it always errs the same way: you need far more material than a casual guess suggests.

The acre and hectare are the two big land units. A hectare is a clean 10,000 m², a square 100 meters on a side. The acre is the awkward historical one, originally the area a team of oxen could plow in a day, which is why it converts to such an unfriendly number.