GPM to m³/s Converter
Enter the flow rate in gpm below to convert it to m³/s.
Convert GPM (US) to m³/s
Enter a value in gpm (us) (GPM) to convert to m³/s (m³/s).
US Gallons per Minute to Cubic Meters per Second Conversion Table
Table showing various us gallons per minute measurements converted to m³/s. Click any preset value or arrow to load it into the converter.
| GPM (US) (GPM) | m³/s (m³/s) |
|---|---|
| 1 GPM | 0.00006309 m³/s |
| 2 GPM | 0.00012618 m³/s |
| 5 GPM | 0.000315451 m³/s |
| 10 GPM | 0.000630902 m³/s |
| 15 GPM | 0.000946353 m³/s |
| 20 GPM | 0.0012618 m³/s |
| 25 GPM | 0.0015773 m³/s |
| 30 GPM | 0.0018927 m³/s |
| 50 GPM | 0.0031545 m³/s |
| 75 GPM | 0.0047318 m³/s |
How to Convert GPM to m³/s
To convert gpm to m³/s, multiply the flow rate by the following conversion ratio: 0.00006309 m³/s/us gallons per minute.
Since one us gallons per minute is equal to 0.00006309 m³/s, you can use this simple formula to convert:
The flow rate in m³/s is equal to the flow rate in gpm multiplied by 0.00006309.
For example, here's how to convert 500 gpm to m³/s using the formula above.
How Many m³/s Are in a US Gallons per Minute?
There are 0.00006309 m³/s in a us gallons per minute, which is why we use this value in the formula above.
Our us gallons per minute to cubic meters per second calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
GPM and m³/s are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a US Gallons per Minute?
A us gallons per minute is a unit of flow rate equal to 3.7854118 liters per minute (L/min), the base unit for flow rate. Standard US plumbing & pump flow rate (3.78541 L/min). [1]
The us gallons per minute is classified as a US customary unit of flow rate. GPM can be abbreviated as GPM; for example, 1 us gallons per minute can be written as 1 GPM.
When working with gpm (GPM) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gpm (GPM) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Cubic Meters per Second?
A cubic meters per second is a unit of flow rate equal to 60,000 liters per minute (L/min), the base unit for flow rate. Coherent SI flow unit equal to 1,000 L/s (60,000 L/min). [2]
The cubic meters per second is classified as an International System of Units (SI) unit of flow rate. m³/s can be abbreviated as m³/s; for example, 1 cubic meters per second can be written as 1 m³/s.
When working with m³/s (m³/s) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, m³/s (m³/s) are widely used across large-scale industrial, bulk, and macro-level flow rate specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting flow rate between gpm (GPM) and m³/s (m³/s), keep full floating-point precision (1 GPM = 0.00006309 m³/s; 1 m³/s = 15,850.3231415 GPM) during intermediate calculations and round only the final cubic meters per second figure to match your instrument tolerance.
More US Gallons per Minute & Cubic Meters per Second Conversions
Need to calculate in the opposite direction? Use our m³/s to gpm (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting m³/s to gpm (us), converting gpm (us) to liters per minute, or converting gpm (us) to m³/h.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — GPM (US) (GPM) to m³/s (m³/s)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: US Gallons per Minute (GPM) (GPM) & Cubic Meters per Second (m³/s)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (GPM to m³/s)