Cubic meters to acre-feet
Type a value in cubic meters to see it in acre-feet straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the cubic meters box.
- Read the result in acre-feet as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
ac·ft = m³ × 0.0008107131938
Multiply the value in cubic meters by 0.0008107131938 to get acre-feet.
Example
To convert 25 m³ to acre-feet: 25 × 0.0008107131938 = 0.0202678 ac·ft.
Conversion table
| Cubic meters (m³) | Acre-feet (ac·ft) |
|---|---|
| 1 | 0.000810713 |
| 2 | 0.00162143 |
| 3 | 0.00243214 |
| 5 | 0.00405357 |
| 10 | 0.00810713 |
| 20 | 0.0162143 |
| 25 | 0.0202678 |
| 50 | 0.0405357 |
| 100 | 0.0810713 |
| 250 | 0.202678 |
| 500 | 0.405357 |
| 1,000 | 0.810713 |
About the units
- Cubic meter
- The cubic meter is the SI unit of volume, a cube one meter on each side, equal to exactly 1000 liters.
- Acre-foot
- The acre-foot is the water that covers one acre to a depth of one foot: 43560 cubic feet or 1233.48183754752 cubic meters.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many acre-feet are in one cubic meter?
1 m³ = 0.000810713 ac·ft exactly.
How do I convert cubic meters to acre-feet?
Use ac·ft = m³ × 0.0008107131938. For example, 25 m³ = 0.0202678 ac·ft.
How many cubic meters are in one acre-foot?
1 ac·ft = 1,233.48 m³.
What is the difference between a US gallon and an imperial gallon?
A US gallon is 3.785411784 liters and the imperial gallon used in the UK is 4.54609 liters, about 20% larger. Check where a figure comes from before converting, since US sources mean the US gallon.
How many milliliters are in a cup?
The US customary cup used in recipes is 236.5882365 mL and the metric cup is 250 mL. US nutrition labels round the cup to 240 mL, so the figure differs slightly between sources.