This converter turns any area into all the others through the square meter as an exact base unit. Metric land units: 1 km² = 100 hectare (hm²) = 1,000,000 m², 1 hectare = 100 are (a) = 10,000 m², and 1 are = 100 m². Smaller metric squares step by hundreds: 1 m² = 100 dm² = 10,000 cm² = 1,000,000 mm². Because area is length squared, each metric step is the square of the length step.
Traditional and imperial units mix in: the Chinese mu (亩) = 2000/3 m² ≈ 666.67 m², the acre = 4046.8564224 m² exactly (43,560 square feet), the square foot = 0.09290304 m², and the square inch = 1/144 square foot. So 1 acre ≈ 6.07 mu and 1 hectare ≈ 2.47 acre. Every result keeps 12 significant figures to remove floating-point noise. All math runs locally in your browser; nothing is uploaded.