Convert Cubic Meter to Acre-Foot
Convert cubic meters to acre-feet instantly. 1 cubic meter = 0.0008107132 acre-foot — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Acre-Foot to Cubic Meter converter for the reverse conversion.
Units explained
Cubic Meter
The cubic meter is the SI derived unit of volume: the volume of a cube one meter on each edge. It is the anchor for all volume conversions.
Defined from the meter, the SI base unit of length, fixed by the speed of light since 1983.
The standard scientific and industrial unit of volume worldwide; used for water, gas, concrete and freight.
SI base derivation.
Acre-Foot
An acre-foot is the volume covering one acre to a depth of one foot (1,233.48 m³).
Combines the acre and the foot for large water volumes.
The standard US unit for reservoir and irrigation water.
US water management.
Cubic Meter to Acre-Foot conversion formula
The relationship between cubic meters and acre-feet:
To convert cubic meters to acre-feet, multiply the value in cubic meters by 0.0008107132. To reverse, multiply acre-feet by 1233.4818375475.
How to use this converter
Type a value into the calculator. The result in acre-feet updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Acre-Foot to Cubic Meter converter for the reverse direction.
Step-by-step: convert cubic meters to acre-feet
- Write down the value in cubic meters (m³).
- Multiply that value by the factor 0.0008107132.
- The product is the equivalent value in acre-feet (ac·ft).
- To reverse, multiply the acre-foot value by 1233.4818375475.
Worked examples
Example 1 — Convert 1 m³ to ac·ft:
1 × 0.0008107132 = 0.0008107132 ac·ft
Example 2 — Convert 100 m³ to ac·ft:
100 × 0.0008107132 = 0.0810713194 ac·ft
Real-world example — Imperial mile arithmetic
5,280 cubic meters equals exactly one acre-foot. American hikers tracking elevation gain in the smaller unit but trail length in the larger one use this constant every time they read a topographic map.
5280 m³ × 0.0008107132 = 4.2805656632 ac·ft
Real-world example — Imperial yard-to-mile scale
1,760 cubic meters equals exactly one acre-foot. American athletes and surveyors use this conversion to translate distances quoted in the smaller imperial unit into recognizable fractions of the larger geographic one.
1760 m³ × 0.0008107132 = 1.4268552211 ac·ft
Real-world example — Metric distance scale-up
One thousand cubic meters equals one acre-foot — the running distance for a 1K race or the standard metric kilometre-scale step. The simple thousand-fold conversion is the most-used metric distance translation.
1000 m³ × 0.0008107132 = 0.8107131938 ac·ft
Cubic Meter to Acre-Foot conversion table
Standard reference values for converting cubic meters to acre-feet:
| Cubic Meter [m³] | Acre-Foot [ac·ft] |
|---|---|
| 0.01 | 8.107132e-6 |
| 0.1 | 8.107132e-5 |
| 1 | 0.0008107132 |
| 2 | 0.0016214264 |
| 3 | 0.0024321396 |
| 4 | 0.0032428528 |
| 5 | 0.004053566 |
| 10 | 0.0081071319 |
| 20 | 0.0162142639 |
| 30 | 0.0243213958 |
| 40 | 0.0324285278 |
| 50 | 0.0405356597 |
| 100 | 0.0810713194 |
| 500 | 0.4053565969 |
| 1000 | 0.8107131938 |
Frequently asked questions
How many acre-feet is 1 cubic meter?
How do I convert cubic meters to acre-feet?
How do I convert acre-feet back to cubic meters?
How many acre-feet is 100 cubic meters?
Popular volume unit conversions
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Metric / SI (13 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Industrial / Specialized (5 units)
Sources & references
Conversion factor (1 m³ = 0.0008107132 ac·ft) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.