Convert MCM to Cubic Metres (MCM to m3)
1 million cubic metres (MCM) = 1000000 cubic metres (m³). 1 m³ = 0.000001 MCM. Example: 15 MCM = 15 × 1000000 = 15000000 m³.
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1 MCM = 1000000 m³
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk MCM to cubic metre converter to paste a column from Excel.
How to Convert MCM to Cubic Metre
- 1 MCM = 1000000 m³
- 1 m³ = 0.000001 MCM
- Example: convert 15 MCM to m³: 15 MCM = 15 × 1000000 m³ = 15000000 m³
Formula
m³ = MCM × 1000000
Derivation from SI units:
- 1 MCM = 10⁶ m³ = 1 hm³ (cubic hectometre).
- 1 m³ = 10⁻⁶ MCM.
Both units are defined exactly, so the factor is exact. MCM definition: million cubic metres; Cubic Metre definition: cubic metre.
Worked examples
- A reading of 5 MCM converts to 5000000 m³.
5 MCM × 1000000 = 5000000 m³ - A value of 100 MCM is 100000000 m³.
100 MCM × 1000000 = 100000000 m³
MCM to Cubic Metre conversion table
| MCM | Cubic Metres (m³) |
|---|---|
| 0.1 MCM | 100000 m³ |
| 0.5 MCM | 500000 m³ |
| 1 MCM | 1000000 m³ |
| 5 MCM | 5000000 m³ |
| 10 MCM | 10000000 m³ |
| 50 MCM | 50000000 m³ |
| 100 MCM | 100000000 m³ |
| 500 MCM | 500000000 m³ |
| 1000 MCM | 1000000000 m³ |
| 10000 MCM | 10000000000 m³ |
Where it's used
MCM are used for CWC weekly reservoir storage bulletins, while cubic metres appear in farm ponds, tanks and check-dam storage. Both measure volume of stored or released water (reservoirs, river flows, allocations), so the conversion is a fixed factor.
MCM to other water volume units
| Conversion | 1 MCM equals |
|---|---|
| MCM to cubic metre | 1000000 m³ |
| MCM to BCM | 0.001 BCM |
| MCM to TMC | 0.03531466672 TMC |
| MCM to acre-foot | 810.7131938 acre-ft |
| MCM to Mcft | 35.31466672 Mcft |
| MCM to MAF | 0.0008107131938 MAF |
| MCM to hectare-metre | 100 ha·m |
| MCM to megalitre | 1000 ML |
Show 2 more units
| MCM to cubic kilometre | 0.001 km³ |
|---|---|
| MCM to gigalitre | 1 GL |
Frequently asked questions
How many cubic metres are in 1 million cubic metres?
1 MCM = 1000000 m³.
How do I convert million cubic metres to cubic metres?
Multiply the value in MCM by 1000000. For example, 15 MCM × 1000000 = 15000000 m³.
Is the MCM to m³ conversion exact?
Yes. Both units are defined exactly, and 1 MCM is exactly 1000000 m³.
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). Convert MCM to Cubic Metres (MCM to m3). Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/mcm-to-cubic-meters/
IEEE
Scientific Converters, "Convert MCM to Cubic Metres (MCM to m3)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/mcm-to-cubic-meters/