At One Place

Square feet to square miles

1 square foot in square miles
1 ft² = 3.587 × 10^-8 mi²
mi² = ft² × 3.587006428 × 10^-8

To convert square feet to square miles, multiply by 3.587006428 × 10^-8. The table below gives the values people look up most often, and the converter works for any number.

Square feet to square miles table

Common square foot values converted to square miles.
Square feet Square miles
1 ft² 3.587 × 10^-8
2 ft² 7.174 × 10^-8
3 ft² 1.076 × 10^-7
4 ft² 1.435 × 10^-7
5 ft² 1.794 × 10^-7
10 ft² 3.587 × 10^-7
15 ft² 5.381 × 10^-7
20 ft² 7.174 × 10^-7
25 ft² 8.968 × 10^-7
30 ft² 0.000001076
40 ft² 0.000001435
50 ft² 0.000001794
75 ft² 0.00000269
100 ft² 0.000003587
250 ft² 0.000008968
500 ft² 0.00001794
1,000 ft² 0.00003587

How the conversion works

The relationship is mi² = ft² × 3.587006428 × 10^-8. Both units measure area, so the conversion is a fixed factor that never changes.

Common questions

How many square miles are in one square foot?
One square foot equals 3.587 × 10^-8 square miles. mi² = ft² × 3.587006428 × 10^-8.
How do you convert square feet to square miles?
Use mi² = ft² × 3.587006428 × 10^-8. So 10 ft² is 3.587 × 10^-7 mi².
How many square feet are in one square mile?
One square mile equals 27,878,400 square feet, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked