Converter

volume · United States · Modern

acre-foot

acre·ftexact
Record
M429
Definition quality
Standardized
Conversion mode
multiplicative
Calculator
Fully calculable

Definition

For the international-foot acre used here, 1 acre-foot = 43,560 ft³ = 1233.48183754752 m³ exactly.

Reference value

One acre-foot is exactly 1,233.48183754752 cubic metres.

History & use

Common U.S. water-resource volume.

Modern use

Still in current use in United States. Beyond that, modern use is context-dependent and varies by region and measurement system.

Did you know?

Legacy survey-foot acre-foot values must remain distinct.

Sources & evidence

Related measurements

volume · International · Modern

Non-SI unit accepted for use with the SI; 1 L = 1 dm³ = 10⁻³ m³.

volume · International · Modern

1 mL = 10^-3 L = 10^-6 m³.

volume · International · Modern

Coherent SI derived unit for volume, equal to metre cubed.

volume · UK / US · Modern / historical

1 U.S. fluid ounce = 1/128 U.S. gallon = 29.5735295625 mL.

volume · UK / US · Modern / historical

1 Imperial fluid ounce = 1/160 Imperial gallon = 28.4130625 mL.

volume · UK / US · Modern / historical

1 U.S. customary cup = 8 U.S. fluid ounces = 236.5882365 mL.

pint (US liquid)

pt (US liq)

volume · UK / US · Modern / historical

1 U.S. liquid pint = 1/8 U.S. gallon = 0.473176473 L.

volume · UK / US · Modern / historical

1 Imperial pint = 1/8 Imperial gallon = 0.56826125 L.