acre ac
4,047 m². US farmland and lot size.
Quick convert — acre to popular units
Live converter, three directions. Type any value to update all three.
acre
square metre
1 ac = 4,046.8564m²
acre
square kilometre
1 ac = 0.004km²
acre
square centimetre
1 ac = 40,468,564.224cm²
Conversion table — acre to every Area unit
All values for 1 ac (forward) and 1 reverse unit → {symbol}.
| To / From | 1 ac = | 1 to-unit = |
|---|---|---|
| square metre (m²) | 4,046.8564224 m² | 0.00024711 ac |
| square kilometre (km²) | 0.00404686 km² | 247.10538147 ac |
| square centimetre (cm²) | 40,468,564.224 cm² | 2.471054e-8 ac |
| hectare (ha) | 0.40468564 ha | 2.47105381 ac |
| square foot (ft²) | 43,560 ft² | 2.295684e-5 ac |
| square inch (in²) | 6,272,640 in² | 1.594225e-7 ac |
| square mile (mi²) | 0.0015625 mi² | 640 ac |
| square yard (yd²) | 4,840 yd² | 0.00020661 ac |
Frequently Asked Questions
What does ac stand for?
acre (ac) is a unit of Area.
How many ac are in 1 m²?
1 m² = 4,046.856422 ac, so 1 ac = 0.000247 m².
Is this the SI base unit?
No. acre is one of several units in the Area category. The SI base is m².
Common conversions from acre
#1
acre (ac) → square meter (m²)
Convert acre (ac) to square meter.
#2acre (ac) → square kilometer (km²)
Convert acre (ac) to square kilometer.
#3acre (ac) → square centimeter (cm²)
Convert acre (ac) to square centimeter.
#4acre (ac) → hectare (ha)
Convert acre (ac) to hectare.
#5acre (ac) → square foot (ft²)
Convert acre (ac) to square foot.
#6acre (ac) → square inch (in²)
Convert acre (ac) to square inch.
#7acre (ac) → square mile (mi²)
Convert acre (ac) to square mile.
#8acre (ac) → square yard (yd²)
Convert acre (ac) to square yard.