Cubic Metre (m³)
The cubic metre is the SI unit of volume: 1000 litres. Field and project volumes (ponds, tanks, earthwork, daily water use) are given in m³ before being scaled to MCM for reservoirs.
Symbol: m³ (ASCII: m3)
Quantity: volume of stored or released water (reservoirs, river flows, allocations)
SI relation: 1 m³ = 0.000001 MCM (exact)
Derivation: 1 m³ = 10⁻⁶ MCM.
Exact: yes, by definition
Typical uses
- Farm ponds, tanks and check-dam storage
- Daily and annual water use
- Earthwork and excavation volumes
Convert cubic metres to other units
| Conversion | 1 m³ equals | Reverse |
|---|---|---|
| cubic metre to MCM | 0.000001 MCM | MCM to cubic metre |
| cubic metre to BCM | 1 × 10⁻⁹ BCM | BCM to cubic metre |
| cubic metre to TMC | 3.531466672 × 10⁻⁸ TMC | TMC to cubic metre |
| cubic metre to acre-foot | 0.0008107131938 acre-ft | acre-foot to cubic metre |
| cubic metre to Mcft | 0.00003531466672 Mcft | Mcft to cubic metre |
| cubic metre to MAF | 8.107131938 × 10⁻¹⁰ MAF | MAF to cubic metre |
| cubic metre to hectare-metre | 0.0001 ha·m | hectare-metre to cubic metre |
| cubic metre to megalitre | 0.001 ML | megalitre to cubic metre |
| cubic metre to cubic kilometre | 1 × 10⁻⁹ km³ | cubic kilometre to cubic metre |
| cubic metre to gigalitre | 0.000001 GL | gigalitre to cubic metre |
Open the Water Volume Converter (TMC, MCM, Acre-foot) to convert any value between all units.
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).
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). Cubic Metre (m³). Retrieved October 29, 2026, from https://scientificconverters.com/units/cubic-meter-water/
IEEE
Scientific Converters, "Cubic Metre (m³)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/cubic-meter-water/