1 gallon (US) per minute [gpm] = 0.000063 cubic meter per second [m3/s]
Example: 1 gallon (US) per minute [gpm] equals 0.000063 cubic meter per second [m3/s].
Examples
1 gallon (US) per minute [gpm] = 0.000063 cubic meter per second [m3/s]
2 gallon (US) per minute [gpm] = 0.000126 cubic meter per second [m3/s]
5 gallon (US) per minute [gpm] = 0.000315 cubic meter per second [m3/s]
10 gallon (US) per minute [gpm] = 0.000631 cubic meter per second [m3/s]
20 gallon (US) per minute [gpm] = 0.001262 cubic meter per second [m3/s]
25 gallon (US) per minute [gpm] = 0.001577 cubic meter per second [m3/s]
Practical Uses for gallon us per minute to cubic meter per second
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.
cubic meter per second [m3/s]
Definition
The cubic meter per second (m3/s) 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 cubic meter per second 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 cubic meter per second [m3/s].
How do I convert gallon (US) per minute to cubic meter per second?
Use this formula: 1 gallon (US) per minute [gpm] = 0.000063 cubic meter per second [m3/s] Enter your value in the calculator and the result updates instantly.
How many cubic meter per second are in 1 gallon (US) per minute?
1 gallon (US) per minute [gpm] equals 0.000063 cubic meter per second [m3/s].
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.