Volumetric Flow Rate Calculator

Volumetric Flow Rate Calculator: Convert Mass Flow to Volume Flow

When a mass flow rate is known, for example from a fuel or air supply spec, converting it into a volumetric flow rate is essential for sizing ducts, fans, and piping. This calculator performs that conversion using the gas density at the actual flowing conditions.

The Formula

Volumetric Flow = Mass Flow / Density

Worked Example

A gas flows at a mass rate of 3.6 kg/s with a density of 1.2 kg/m3.

Volumetric Flow = 3.6 / 1.2 = 3.0 m3/s

How to Use This Calculator

1. Enter the mass flow rate in kg/s.
2. Enter the gas density in kg/m3.
3. Click Calculate to get the volumetric flow rate.

Related Calculations

Pair with the Pipe Velocity Calculator to then determine flow velocity in a given duct.