Convert MCM to MAF
1 million cubic metres (MCM) = 0.0008107131938 million acre-feet (MAF). 1 MAF = 1233.481838 MCM. Example: 15 MCM = 15 × 0.0008107131938 = 0.01216069791 MAF.
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1 MCM = 0.0008107131938 MAF
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk MCM to MAF converter to paste a column from Excel.
How to Convert MCM to MAF
- 1 MCM = 0.0008107131938 MAF
- 1 MAF = 1233.481838 MCM
- Example: convert 15 MCM to MAF: 15 MCM = 15 × 0.0008107131938 MAF = 0.01216069791 MAF
Formula
MAF = MCM × 0.0008107131937899
or MAF = MCM ÷ 1233.481837548
Derivation from SI units:
- 1 MCM = 10⁶ m³ = 1 hm³ (cubic hectometre).
- 1 MAF = 10⁶ acre-feet = 1233.48 MCM.
Both units are defined exactly, so the factor is exact. MCM definition: million cubic metres; MAF definition: million acre-feet.
Worked examples
- A reading of 5 MCM converts to 0.004053565969 MAF.
5 MCM × 0.0008107131938 = 0.004053565969 MAF - A value of 100 MCM is 0.08107131938 MAF.
100 MCM × 0.0008107131938 = 0.08107131938 MAF
MCM to MAF conversion table
| MCM | MAF |
|---|---|
| 0.1 MCM | 0.00008107131938 MAF |
| 0.5 MCM | 0.0004053565969 MAF |
| 1 MCM | 0.0008107131938 MAF |
| 5 MCM | 0.004053565969 MAF |
| 10 MCM | 0.008107131938 MAF |
| 50 MCM | 0.04053565969 MAF |
| 100 MCM | 0.08107131938 MAF |
| 500 MCM | 0.4053565969 MAF |
| 1000 MCM | 0.8107131938 MAF |
| 10000 MCM | 8.107131938 MAF |
Where it's used
MCM are used for CWC weekly reservoir storage bulletins, while million acre-feet appear in indus Waters Treaty and Pakistan IRSA accounts. 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 MAF | 0.0008107131938 MAF |
| MCM to BCM | 0.001 BCM |
| MCM to TMC | 0.03531466672 TMC |
| MCM to acre-foot | 810.7131938 acre-ft |
| MCM to cubic metre | 1000000 m³ |
| MCM to Mcft | 35.31466672 Mcft |
| 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 million acre-feet are in 1 million cubic metres?
1 MCM = 0.0008107131938 MAF.
How do I convert million cubic metres to million acre-feet?
Multiply the value in MCM by 0.0008107131938, or divide it by 1233.481838. For example, 15 MCM × 0.0008107131938 = 0.01216069791 MAF.
Is the MCM to MAF 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 MCM to MAF. Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/mcm-to-maf/
IEEE
Scientific Converters, "Convert MCM to MAF," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/mcm-to-maf/