1 gallon (US) per minute [gpm] = 60 gallon (US) per hour [gal/h]
Example: 1 gallon (US) per minute [gpm] equals 60 gallon (US) per hour [gal/h].
Examples
1 gallon (US) per minute [gpm] = 60 gallon (US) per hour [gal/h]
2 gallon (US) per minute [gpm] = 120 gallon (US) per hour [gal/h]
5 gallon (US) per minute [gpm] = 300 gallon (US) per hour [gal/h]
10 gallon (US) per minute [gpm] = 600 gallon (US) per hour [gal/h]
20 gallon (US) per minute [gpm] = 1200 gallon (US) per hour [gal/h]
25 gallon (US) per minute [gpm] = 1500 gallon (US) per hour [gal/h]
Practical Uses for gallon us per minute to gallon us per hour
quick homework checksshopping and product comparisonstravel planningprofessional estimatesDIY and household measurementsgeneral reference
Sources and Accuracy
Flow rate conversions use cubic meter per second as the reference unit and include common pump, plumbing, HVAC, and process-flow units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
gallon (US) per minute [gpm]
Definition
US gallons per minute measures volume flow rate in US liquid gallons each minute.
History
GPM developed from customary liquid volume measurement used in plumbing and pumping.
Current use
GPM is used for faucets, pumps, fire protection, irrigation, pools, and water-treatment systems.
gallon (US) per hour [gal/h]
Definition
The gallon (US) per hour (gal/h) is a flow rate unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use gallon (US) per hour when comparing flow rate values, checking specifications, converting between systems, or preparing quick estimates.
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How to Convert
Enter the value in the “From value” field.
Confirm the source unit is gallon (US) per minute [gpm].
Confirm the target unit is gallon (US) per hour [gal/h].
How do I convert gallon (US) per minute to gallon (US) per hour?
Use this formula: 1 gallon (US) per minute [gpm] = 60 gallon (US) per hour [gal/h] Enter your value in the calculator and the result updates instantly.
How many gallon (US) per hour are in 1 gallon (US) per minute?
1 gallon (US) per minute [gpm] equals 60 gallon (US) per hour [gal/h].
Can I reverse this conversion?
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.