Convert MAF to BCM
1 million acre-feet (MAF) = 1.233481838 billion cubic metres (BCM). 1 BCM = 0.8107131938 MAF. Example: 1 MAF = 1 × 1.233481838 = 1.233481838 BCM.
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1 MAF = 1.233481838 BCM
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk MAF to BCM converter to paste a column from Excel.
How to Convert MAF to BCM
- 1 MAF = 1.233481838 BCM
- 1 BCM = 0.8107131938 MAF
- Example: convert 1 MAF to BCM: 1 MAF = 1 × 1.233481838 BCM = 1.233481838 BCM
Formula
BCM = MAF × 1.233481837548
Derivation from SI units:
- 1 MAF = 10⁶ acre-feet = 1233.48 MCM.
- 1 BCM = 10⁹ m³ = 1000 MCM = 1 km³.
- 1 MAF = 1233.481837548 MCM ÷ 1000 MCM per BCM = 1.233481837548 BCM
Both units are defined exactly, so the factor is exact. MAF definition: million acre-feet; BCM definition: billion cubic metres.
Worked examples
- 1 MAF is 1.233481838 BCM.
1 MAF × 1.233481838 = 1.233481838 BCM - A flow of 16.5 MAF is 20.35245032 BCM.
16.5 MAF × 1.233481838 = 20.35245032 BCM
MAF to BCM conversion table
| MAF | BCM |
|---|---|
| 0.1 MAF | 0.1233481838 BCM |
| 0.5 MAF | 0.6167409188 BCM |
| 1 MAF | 1.233481838 BCM |
| 2 MAF | 2.466963675 BCM |
| 5 MAF | 6.167409188 BCM |
| 7.5 MAF | 9.251113782 BCM |
| 10 MAF | 12.33481838 BCM |
| 16.5 MAF | 20.35245032 BCM |
| 26 MAF | 32.07052778 BCM |
| 100 MAF | 123.3481838 BCM |
Where it's used
River flows and treaty allocations in MAF are converted to BCM for international comparison. Multiply by 1.23348.
MAF to other water volume units
| Conversion | 1 MAF equals |
|---|---|
| MAF to BCM | 1.233481838 BCM |
| MAF to MCM | 1233.481838 MCM |
| MAF to TMC | 43.56 TMC |
| MAF to acre-foot | 1000000 acre-ft |
| MAF to cubic metre | 1233481838 m³ |
| MAF to Mcft | 43560 Mcft |
| MAF to hectare-metre | 123348.1838 ha·m |
| MAF to megalitre | 1233481.838 ML |
Show 2 more units
| MAF to cubic kilometre | 1.233481838 km³ |
|---|---|
| MAF to gigalitre | 1233.481838 GL |
Frequently asked questions
How many BCM is 1 MAF?
1 MAF = 1.233481838 BCM.
How many billion cubic metres are in 1 million acre-feet?
1 MAF = 1.233481838 BCM.
How do I convert million acre-feet to billion cubic metres?
Multiply the value in MAF by 1.233481838. For example, 1 MAF × 1.233481838 = 1.233481838 BCM.
Is the MAF to BCM 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
- 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".
- 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 MAF to BCM. Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/maf-to-bcm/
IEEE
Scientific Converters, "Convert MAF to BCM," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/maf-to-bcm/