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A cubic metre per second (m³·s⁻¹, m³/s, cumecs or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a cube with sides of one metre (~39.37 in) in length exchanged or moving each second. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC values measuring air flow.

[edit] Conversions

1 cubic metre per second is the same as:

• 1,000 litres per second
• ca 157 ¹⁄₂ cubic fathoms per second
• 264.172051 US gallons per second
• 35.314454 cubic feet per second
• ca 1.305 cubic yards per second
• 25,566.497 acre feet per year
• 31,536,000 cubic metres per year
• 1,113,676,621 cubic feet per year
• 0.007565843 cubic miles per year

[edit] See also

• 1 E-1 m³ for a comparison with other volumes
• Cubic mile
• Orders of magnitude (volume)
• Conversion of units