m3/h to GPM Converter

Summary

Enter a flow rate in cubic meters per hour (m3/h) to get the equivalent US gallons per minute (GPM) instantly, with a reverse converter and reference table.

How it works

1. Enter a flow rate value in cubic meters per hour (m3/h) in the top input field.
2. The GPM result appears instantly as you type — no button press needed.
3. Use the reverse field to convert GPM back to m3/h.
4. Click "Copy" next to any result to copy it to your clipboard.
5. Click any row in the reference table to load that value into the converter.
6. The formula is: GPM = m3/h × 4.40286754 (based on 1 US gal = 3.785411784 L).

Use cases

• Convert industrial pump flow ratings between metric and US specifications.
• Size HVAC chilled-water or cooling-tower circuits when mixing metric and imperial equipment.
• Verify water treatment plant throughput against GPM-stated permit limits.
• Cross-check irrigation mainline flow rates between metric design specs and US GPM emitters.
• Compare centrifugal pump performance curves from different international manufacturers.
• Convert fire-suppression or sprinkler system flow requirements for international projects.
• Calculate GPM output for boiler feedwater or process cooling systems specified in m3/h.
• Convert municipal water supply flow rates for engineering reports.

Frequently Asked Questions