Which volumetric flow units are supported?

The converter supports m³/h, L/min, US gpm, and cfm.

Does gpm mean US gallons per minute?

Yes. The conversion uses 1 US gallon = 3.785411784 litres.

cfm means cubic feet per minute, using 1 ft³ = 28.3168466 litres.

Can I control the displayed precision?

Yes. Set Decimal Places from 0 to 10; the default is 4.

Can I enter a negative flow value?

No. The Value input must be non-negative; flow direction is handled separately.

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Volumetric Flow Rate Converter (m³/h / L/min / gpm / cfm)

Convert volumetric flow rate between m³/h (cubic metres per hour), L/min (litres per minute), gpm (US gallons per minute, 1 gal = 3.785411784 L), and cfm (cubic feet per minute, 1 ft³ = 28.3168466 L). Converts via m³/s to the target unit and also lists the equivalent value in all four units for reference. Used for pumps, HVAC, compressed air, and piping.

Execution

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2 examples

100 L/min → gpm ≈ 26.4172

100 L/min × (1e-3/60) m³/s = 0.001667 m³/s ÷ (3.785411784e-3/60) = 26.4172 gpm. Equivalent: 6 m³/h, 3.5315 cfm. Typical small centrifugal pump output.

{"result":"100 L/min = 26.4172 gpm. All units: m³/h=6, L/min=100, gpm=26.4172, cfm=3.5315.","metadata":{"input":{"inputUnit":"L/min","value":100,"outputUnit":"gpm"},"result":{"outputValue":26.4172,"outputUnit":"gpm","m3h":6,"lmin":100,"gpm":26.4172,"cfm":3.5315}}}

500 cfm → m³/h ≈ 849.5054

500 cfm × (2.83168466e-2/60) = 0.235974 m³/s × 3600 = 849.5054 m³/h. Equivalent: 14158.4233 L/min, 3740.2597 gpm. Common HVAC air-handling unit rating.

{"result":"500 cfm = 849.5054 m³/h. All units: m³/h=849.5054, L/min=14158.4233, gpm=3740.2597, cfm=500.","metadata":{"input":{"inputUnit":"cfm","value":500,"outputUnit":"m³/h"},"result":{"outputValue":849.5054,"outputUnit":"m³/h","m3h":849.5054,"lmin":14158.4233,"gpm":3740.2597,"cfm":500}}}

Inputs

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4 options

SettingsAdjust formats, ranges, numbers, and modes.4

Input unitselectOptionalValuenumberRequiredVolumetric flow value in the selected Input unit. Must be non-negative (flow direction is handled separately).Output unitselectOptionalDecimal PlacesnumberOptional

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Volumetric Flow Rate Converter (m³/h / L/min / gpm / cfm)

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Examples

1. Small pump flow conversion

2. HVAC air-handling rating conversion

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