Area Converter
Convert square meters, square kilometers, square feet, acres, hectares and more. Type in any unit; all others update instantly.
Select Your Unit
About This Converter
This area converter supports 9 units spanning metric and imperial systems, using exact conversion factors defined by NIST. Every calculation passes through a square-meter base, so results are precise whether you are sizing a room in square feet, estimating farmland in acres or hectares, or converting a city map from km² to mi². It is a handy tool for real estate, landscaping, construction, and geography homework.
FAQ
Hectare vs acre — what's the difference?
1 hectare (ha) = 10,000 m² (100 m × 100 m). 1 acre (ac) = 4,046.8564224 m². A hectare is about 2.471 acres.
Is 1 cm² exactly 100 mm²?
Yes. 1 cm = 10 mm, so 1 cm² = (10 mm)² = 100 mm².
Common land sizes
A football/soccer pitch is ~7,000–7,500 m². A city block varies widely; some US blocks are ~0.01–0.04 km².
Tips for entering values
Select the unit first, then enter a value once — every tile updates instantly.