Volumetric Flow Rate Converter

Convert volumetric flow rate values among common SI, metric and customary units. Volumetric flow rate measures volume passing a point per time. Every option is converted through m³/s.

ValueEnter zero or a positive value; scientific notation is accepted.Convert fromCubic meter per second (m³/s)Cubic meter per hour (m³/h)Liter per second (L/s)Liter per minute (L/min)Milliliter per minute (mL/min)Cubic foot per second (ft³/s)Cubic foot per minute (ft³/min)US gallon per minute (US gpm)Convert toCubic meter per second (m³/s)Cubic meter per hour (m³/h)Liter per second (L/s)Liter per minute (L/min)Milliliter per minute (mL/min)Cubic foot per second (ft³/s)Cubic foot per minute (ft³/min)US gallon per minute (US gpm)

Convert

Converted value26.41720524 US gpm

SI-base value0.001666666667 m³/s

Multiply by0.2641720524

The displayed results apply to the default example. Enable JavaScript to convert other values.

How to use this converter

1. Enter the volumetric flow rate value.
2. Select its current unit and the unit you want.
3. Select Convert. The page shows the converted value, the SI-base value and the direct multiplication factor.

Conversion formula

Converted value = entered value × source-to-SI factor ÷ target-to-SI factor.

Every option is represented by its factor to cubic meter per second (m³/s). This one-base method keeps reciprocal conversions consistent. Calculations run in your browser, and old results are hidden when an input changes or validation fails.

Worked example

Convert 100 L/min to US gpm. Multiply by 0.2641720524; the result is 26.41720524 US gpm. The same input equals 0.001666666667 m³/s in the SI-base unit.

Accuracy and limitations

Real system flow depends on pressure, viscosity, restrictions and pump performance. This page only changes units.

The calculator retains more digits internally than it displays. Round the final value to the precision supported by your measurement. Very large and very small answers may use scientific notation.

Frequently asked questions

Are US and Imperial gallons interchangeable?

No. This converter uses the US liquid gallon; an Imperial gallon is larger.

Can I reverse the conversion?

Yes. Swap the From and To selections. Because both units use the same SI base, the reverse factor is the reciprocal of the forward factor.

Why was my entry rejected?

Use digits with an optional decimal point or scientific notation. Blank values, commas, fractions, words and non-finite entries are rejected. Negative values are rejected because this converter treats the quantity as a magnitude.

Review notes and sources

Reviewed October 4, 2026. The conversion factors, default example, zero or signed boundary behavior, invalid-input handling and recovery after an error were checked. Factors follow SI definitions and published conversion guidance from the NIST Guide to the SI and the BIPM SI Brochure. Explanations and examples are original.

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