Acre-foot (acre-ft)
An acre-foot is the volume of water covering one acre to a depth of one foot, 43,560 ft³ or about 1233 m³. US reservoirs and water rights are stated in acre-feet; Lake Mead holds about 26 million.
Symbol: acre-ft
Quantity: volume of stored or released water (reservoirs, river flows, allocations)
SI relation: 1 acre-ft = 0.001233481837548 MCM (exact)
Derivation: 1 acre-foot = 43,560 ft³ = 1233.48183754752 m³.
Exact: yes, by definition
Typical uses
- US reservoir capacity and water rights
- Irrigation water allocations
- Groundwater pumping records
Convert acre-feet to other units
| Conversion | 1 acre-ft equals | Reverse |
|---|---|---|
| acre-foot to MCM | 0.001233481838 MCM | MCM to acre-foot |
| acre-foot to BCM | 0.000001233481838 BCM | BCM to acre-foot |
| acre-foot to TMC | 0.00004356 TMC | TMC to acre-foot |
| acre-foot to cubic metre | 1233.481838 m³ | cubic metre to acre-foot |
| acre-foot to Mcft | 0.04356 Mcft | Mcft to acre-foot |
| acre-foot to MAF | 0.000001 MAF | MAF to acre-foot |
| acre-foot to hectare-metre | 0.1233481838 ha·m | hectare-metre to acre-foot |
| acre-foot to megalitre | 1.233481838 ML | megalitre to acre-foot |
| acre-foot to cubic kilometre | 0.000001233481838 km³ | cubic kilometre to acre-foot |
| acre-foot to gigalitre | 0.001233481838 GL | gigalitre to acre-foot |
Open the Water Volume Converter (TMC, MCM, Acre-foot) to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "acre-foot".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Acre-foot (acre-ft). Retrieved October 29, 2026, from https://scientificconverters.com/units/acre-foot/
IEEE
Scientific Converters, "Acre-foot (acre-ft)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/acre-foot/