DailyCalc

Acres to Square feet (ac to ft²)

1 ac = 43,560 ft². Type any value to convert it.

1 acre =

43,560 ft²

square feet

Conversion factor
1 ac = 43,560 ft²

Fix the highlighted field to update the result.

Show in all common units
1 ac in other units
UnitValue
square centimeter (cm²)40,468,564.22 cm²
square meter (m²)4,046.856422 m²
hectare (ha)0.4046856422 ha
square kilometer (km²)0.004046856422 km²
square inch (in²)6,272,640 in²
square foot (ft²)43,560 ft²
square yard (yd²)4,840 yd²
acre (ac)1 ac
square mile (mi²)0.0015625 mi²

How to convert acres to square feet

1 ac = 43,560 ft²

1 acre = 43,560 ft² exactly (NIST Handbook 44, Appendix C). Multiply acres by 43,560.

Examples

  • 0.25 ac = 10,890 ft²: A building lot sold by the acre
  • 0.5 ac = 21,780 ft²: A garden plot measured in acres
  • 5 ac = 217,800 ft²: A small farm parcel

Acres to sq ft chart

Acres to square feet
Acres (ac)Square feet (ft²)
0.25 ac10,890 ft²
0.5 ac21,780 ft²
1 ac43,560 ft²
2 ac87,120 ft²
3 ac130,680 ft²
4 ac174,240 ft²
5 ac217,800 ft²
10 ac435,600 ft²
15 ac653,400 ft²
20 ac871,200 ft²
25 ac1,089,000 ft²
50 ac2,178,000 ft²
75 ac3,267,000 ft²
100 ac4,356,000 ft²

Common mistakes

  • NIST still lists a US survey acre of about 4,046.873 m² for legacy records. It is also 43,560 survey square feet, so only the metric value differs, by about 4 parts per million.

Frequently asked questions

How many square feet are in an acre?

Exactly 43,560 square feet. NIST Handbook 44 also lists it as 160 square rods or 10 square chains.

Is an acre a square?

No. An acre is an amount of area, not a shape. If it were a square, each side would be about 208.71 feet (NIST Handbook 44).

How many square feet is half an acre?

Half an acre is exactly 21,780 square feet.

How many square feet is a quarter acre?

A quarter acre is exactly 10,890 square feet.