Convert Cubic Metres to BCM (m3 to BCM)
1 cubic metre (m³) = 1 × 10⁻⁹ billion cubic metres (BCM). 1 BCM = 1000000000 m³. Example: 15 m³ = 15 × 1 × 10⁻⁹ = 1.5 × 10⁻⁸ BCM.
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1 m³ = 1e-9 BCM
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk cubic metre to BCM converter to paste a column from Excel.
How to Convert Cubic Metre to BCM
- 1 m³ = 1 × 10⁻⁹ BCM
- 1 BCM = 1000000000 m³
- Example: convert 15 m³ to BCM: 15 m³ = 15 × 1 × 10⁻⁹ BCM = 1.5 × 10⁻⁸ BCM
Formula
BCM = m³ ÷ 1000000000
Derivation from SI units:
- 1 m³ = 10⁻⁶ MCM.
- 1 BCM = 10⁹ m³ = 1000 MCM = 1 km³.
- 1 m³ = 0.000001 MCM ÷ 1000 MCM per BCM = 1 × 10⁻⁹ BCM
Both units are defined exactly, so the factor is exact. Cubic Metre definition: cubic metre; BCM definition: billion cubic metres.
Worked examples
- A reading of 1000 m³ converts to 0.000001 BCM.
1000 m³ × 1 × 10⁻⁹ = 0.000001 BCM - A value of 100000 m³ is 0.0001 BCM.
100000 m³ × 1 × 10⁻⁹ = 0.0001 BCM
Cubic Metre to BCM conversion table
| Cubic Metres (m³) | BCM |
|---|---|
| 1 m³ | 1 × 10⁻⁹ BCM |
| 10 m³ | 1 × 10⁻⁸ BCM |
| 100 m³ | 1 × 10⁻⁷ BCM |
| 1000 m³ | 0.000001 BCM |
| 10000 m³ | 0.00001 BCM |
| 86400 m³ | 0.0000864 BCM |
| 100000 m³ | 0.0001 BCM |
| 1000000 m³ | 0.001 BCM |
| 10000000 m³ | 0.01 BCM |
| 100000000 m³ | 0.1 BCM |
Where it's used
Cubic Metres are used for farm ponds, tanks and check-dam storage, while billion cubic metres appear in national water resources assessments. Both measure volume of stored or released water (reservoirs, river flows, allocations), so the conversion is a fixed factor.
Cubic Metre to other water volume units
| Conversion | 1 m³ equals |
|---|---|
| cubic metre to BCM | 1 × 10⁻⁹ BCM |
| cubic metre to MCM | 0.000001 MCM |
| cubic metre to TMC | 3.531466672 × 10⁻⁸ TMC |
| cubic metre to acre-foot | 0.0008107131938 acre-ft |
| cubic metre to Mcft | 0.00003531466672 Mcft |
| cubic metre to MAF | 8.107131938 × 10⁻¹⁰ MAF |
| cubic metre to hectare-metre | 0.0001 ha·m |
| cubic metre to megalitre | 0.001 ML |
Show 2 more units
| cubic metre to cubic kilometre | 1 × 10⁻⁹ km³ |
|---|---|
| cubic metre to gigalitre | 0.000001 GL |
Frequently asked questions
How many billion cubic metres are in 1 cubic metre?
1 m³ = 1 × 10⁻⁹ BCM.
How do I convert cubic metres to billion cubic metres?
Multiply the value in m³ by 1 × 10⁻⁹, or divide it by 1000000000. For example, 15 m³ × 1 × 10⁻⁹ = 1.5 × 10⁻⁸ BCM.
Is the m³ to BCM conversion exact?
Yes. Both units are defined exactly, and 1 m³ is exactly 1 × 10⁻⁹ BCM.
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 Cubic Metres to BCM (m3 to BCM). Retrieved October 29, 2026, from https://scientificconverters.com/water-volume/cubic-meters-to-bcm/
IEEE
Scientific Converters, "Convert Cubic Metres to BCM (m3 to BCM)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/water-volume/cubic-meters-to-bcm/