At One Place

40 acre to mi²

40 acres in square miles
40 acre = 0.0625 mi²
mi² = acre × 0.0015625

40 acres is 0.0625 square miles. To get there, multiply by 0.0015625.

Values either side

Acres near 40, converted to square miles.
Acres Square miles
32 acre 0.05
35 acre 0.054688
36 acre 0.05625
37 acre 0.057813
40 acre ← 0.0625
45 acre 0.070313
50 acre 0.078125
55 acre 0.085938
60 acre 0.09375

How the conversion works

The relationship is mi² = acre × 0.0015625. Both units measure area, so the conversion is a fixed factor that never changes.

Common questions

What is 40 acre in square miles?
40 acre is 0.0625 mi².
How do you convert acres to square miles?
Multiply by 0.0015625.

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