Convert Hectare-metres to Acre-feet (ha-m to acre-ft)
1 hectare-metre (ha·m) = 8.107131938 acre-feet (acre-ft). 1 acre-ft = 0.1233481838 ha·m. Example: 15 ha·m = 15 × 8.107131938 = 121.6069791 acre-ft.
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1 ha·m = 8.107131938 acre-ft
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk hectare-metre to acre-foot converter to paste a column from Excel.
How to Convert Hectare-metre to Acre-foot
- 1 ha·m = 8.107131938 acre-ft
- 1 acre-ft = 0.1233481838 ha·m
- Example: convert 15 ha·m to acre-ft: 15 ha·m = 15 × 8.107131938 acre-ft = 121.6069791 acre-ft
Formula
acre-ft = ha·m × 8.107131937899
Derivation from SI units:
- 1 ha·m = 10,000 m² × 1 m = 10⁴ m³ = 0.01 MCM.
- 1 acre-foot = 43,560 ft³ = 1233.48183754752 m³.
- 1 ha·m = 0.01 MCM ÷ 0.001233481837548 MCM per acre-ft = 8.107131937899 acre-ft
Both units are defined exactly, so the factor is exact. Hectare-metre definition: hectare-metre; Acre-foot definition: acre-foot.
Worked examples
- A reading of 100 ha·m converts to 810.7131938 acre-ft.
100 ha·m × 8.107131938 = 810.7131938 acre-ft - A value of 5000 ha·m is 40535.65969 acre-ft.
5000 ha·m × 8.107131938 = 40535.65969 acre-ft
Hectare-metre to Acre-foot conversion table
| Hectare-metres (ha·m) | Acre-feet (acre-ft) |
|---|---|
| 1 ha·m | 8.107131938 acre-ft |
| 10 ha·m | 81.07131938 acre-ft |
| 50 ha·m | 405.3565969 acre-ft |
| 100 ha·m | 810.7131938 acre-ft |
| 500 ha·m | 4053.565969 acre-ft |
| 1000 ha·m | 8107.131938 acre-ft |
| 5000 ha·m | 40535.65969 acre-ft |
| 10000 ha·m | 81071.31938 acre-ft |
| 50000 ha·m | 405356.5969 acre-ft |
| 100000 ha·m | 810713.1938 acre-ft |
Where it's used
Hectare-metres are used for crop water requirement and duty–delta problems, while acre-feet appear in US reservoir capacity and water rights. Both measure volume of stored or released water (reservoirs, river flows, allocations), so the conversion is a fixed factor.
Hectare-metre to other water volume units
| Conversion | 1 ha·m equals |
|---|---|
| hectare-metre to acre-foot | 8.107131938 acre-ft |
| hectare-metre to MCM | 0.01 MCM |
| hectare-metre to BCM | 0.00001 BCM |
| hectare-metre to TMC | 0.0003531466672 TMC |
| hectare-metre to cubic metre | 10000 m³ |
| hectare-metre to Mcft | 0.3531466672 Mcft |
| hectare-metre to MAF | 0.000008107131938 MAF |
| hectare-metre to megalitre | 10 ML |
Show 2 more units
| hectare-metre to cubic kilometre | 0.00001 km³ |
|---|---|
| hectare-metre to gigalitre | 0.01 GL |
Frequently asked questions
How many acre-feet are in 1 hectare-metre?
1 ha·m = 8.107131938 acre-ft.
How do I convert hectare-metres to acre-feet?
Multiply the value in ha·m by 8.107131938. For example, 15 ha·m × 8.107131938 = 121.6069791 acre-ft.
Is the ha·m to acre-ft conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
- 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). Convert Hectare-metres to Acre-feet (ha-m to acre-ft). Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/hectare-meters-to-acre-feet/
IEEE
Scientific Converters, "Convert Hectare-metres to Acre-feet (ha-m to acre-ft)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/hectare-meters-to-acre-feet/