Hydrogen Flow & Energy Conversions

Switch between Nm³/h, kg/h, and energy intensities instantly. Industry-standard density assumptions throughout. Free - no account required.

Make quick, defensible conversions

Use the calculators below to translate between normal volumetric flow, mass flow, gravimetric energy content and dew point equivalents for hydrogen streams. Results assume normal conditions (0 °C, 1.013 bar) unless noted.

Flow and energy conversions

Switch between Nm³/h, kg/h and energy intensities using an industry standard density of 0.08988 kg per Nm³.

Hydrogen flow converter

Enter either normal volumetric flow or mass flow. The counterpart is calculated automatically.

Nm³/h
kg/h

Assumes dry hydrogen at 0 °C and 1.013 bar (0.08988 kg/Nm³).

Gravimetric & volumetric energy

Convert electrolyser or fuel cell figures between kWh per kg and kWh per Nm³.

kWh/kg
kWh/Nm³

Uses the same density assumption as the flow converter.

More engineering tools

Combine these conversions with purity and storage sizing for a complete engineering view.

Storage Sizing Purity / Dew Point All tools