Gallon (US) per Minute to Cubic Meter per Second (GPM to m³/s)
Convert GPM to m³/s — Flow Rate converter
Also written as GPM to m3/s.
One gallon (US) per minute equals 0.0000630902 m³/s, so to convert gallons (US) per minute to cubic meters per second you multiply the value by 0.0000630902. A gallon (US) per minute is smaller than a cubic meter per second — going the other way, 1 m³/s = 15850.32 GPM. For example, 10 GPM = 0.000630902 m³/s and 50 GPM = 0.0031545098 m³/s.
1 GPM = 0.0000630902 m³/s
Gallon (US) per Minute to Cubic Meter per Second formula
1 Gallon (US) per Minute = 0.0000630902 m³/s
Worked examples
- 25 GPM = 0.0015772549 m³/s
- 100 GPM = 0.0063090196 m³/s
Gallon (US) per Minute to Cubic Meter per Second conversion table
| Gallon (US) per Minute (GPM) | Cubic Meter per Second (m³/s) |
|---|---|
| 1 | 0.0000630902 |
| 2 | 0.0001261804 |
| 3 | 0.0001892706 |
| 5 | 0.000315451 |
| 8 | 0.0005047216 |
| 10 | 0.000630902 |
| 12 | 0.0007570824 |
| 15 | 0.0009463529 |
| 20 | 0.0012618039 |
| 25 | 0.0015772549 |
| 50 | 0.0031545098 |
| 100 | 0.0063090196 |
| 250 | 0.01577255 |
| 500 | 0.0315451 |
| 1000 | 0.0630902 |
Which gallon, and which trade
The single most expensive mistake in flow conversion is the gallon. A US liquid gallon is 3.785411784 litres; an imperial gallon is 4.54609 litres. US GPM and imperial GPM differ by about 20%, and pump datasheets frequently do not say which one they mean. Check the manufacturer's country of origin before trusting a GPM figure.
Different trades default to different units for the same physical quantity: HVAC and compressed air work in CFM, plumbing and pumps in GPM or LPM, and process and water engineering in m³/h or L/s. A specification that mixes them is usually quoting different equipment, not different flows. On this page, 1 GPM = 0.0000630902 m³/s.
Frequently asked questions
How many cubic meters per second are in one gallon (US) per minute?
One gallon (US) per minute equals 0.0000630902 cubic meters per second (m³/s).
How many gallons (US) per minute are in one cubic meter per second?
One cubic meter per second equals 15850.32 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to cubic meters per second?
1 Gallon (US) per Minute = 0.0000630902 m³/s. Use the calculator above for any value.
What is 5 GPM in m³/s?
5 GPM = 0.000315451 m³/s.
What is 100 GPM in m³/s?
100 GPM = 0.0063090196 m³/s.
What is 10 GPM in m³/s?
10 GPM = 0.000630902 m³/s.
What is 20 GPM in m³/s?
20 GPM = 0.0012618039 m³/s.
What is 50 GPM in m³/s?
50 GPM = 0.0031545098 m³/s.
What is 500 GPM in m³/s?
500 GPM = 0.0315451 m³/s.
Is a gallon (US) per minute bigger than a cubic meter per second?
No. A gallon (US) per minute is smaller — one gallon (US) per minute equals 0.0000630902 cubic meters per second, while one cubic meter per second equals 15850.32 gallons (US) per minute.