Free Engineering Tool #250

Flow Rate Converter

Convert between common flow rate units: m³/h, l/min, GPM, CFM, m³/s.

m³/h ↔ l/min ↔ GPMCFM ↔ m³/sInstant

Results

m³/h

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l/min

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GPM (US)

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CFM

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m³/s

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1 m³/h = 16.667 l/min = 4.403 GPM = 0.5886 CFM = 2.778×10⁻⁴ m³/s

US Gallons Per Minute. 1 GPM = 3.785 l/min = 0.2271 m³/h.

Cubic Feet per Minute. Used for gas/air flow. 1 CFM = 1.699 m³/h.

Volume flow = mass flow / density. E.g., for water: Q(m³/h) = ṁ(kg/h) / 1000.

For gases, specify standard conditions (usually 0°C, 101.325 kPa or 15°C, 101.325 kPa).

l/min ÷ 60 = l/s. Both are common in hydraulics and water treatment.