US gallons per minute to meters per second
Type a value in GPM to get it in m/s instantly.
That's 1.03× as fast as the noisy limit, while the erosive limit is 1.61× faster. Getting water moving that fast costs about 489.7 mm of head.
What it means
How fast is it moving?
Velocities are averages across the bore. At the wall the fluid is stationary and in the middle it moves faster, which is what erodes bends.
The math
How to convert GPM to m/s
Velocity is flow divided by cross-sectional area: v = Q ÷ (π × (bore ÷ 2)²). Because the area goes with the square of the bore, one size up cuts the velocity to less than half. The figures below use the bore selected above.
Example: 10 GPM = 3.09899 m/s.
The table below is for DN15, ½ inch (16.1 mm bore).
Every unit
Your velocity in every unit
Tables
GPM to m/s conversion table
| GPM | m/s |
|---|---|
| 0.25 GPM | 0.0774748 m/s |
| 0.5 GPM | 0.15495 m/s |
| 0.75 GPM | 0.232424 m/s |
| 1 GPM | 0.309899 m/s |
| 1.5 GPM | 0.464849 m/s |
| 2 GPM | 0.619798 m/s |
| 2.5 GPM | 0.774748 m/s |
| 3 GPM | 0.929697 m/s |
| 4 GPM | 1.2396 m/s |
| 5 GPM | 1.5495 m/s |
| 8 GPM | 2.47919 m/s |
m/s to GPM conversion table
| m/s | GPM |
|---|---|
| 0.25 m/s | 0.806714 GPM |
| 0.5 m/s | 1.61343 GPM |
| 0.75 m/s | 2.42014 GPM |
| 1 m/s | 3.22686 GPM |
| 1.5 m/s | 4.84029 GPM |
| 2 m/s | 6.45371 GPM |
| 2.5 m/s | 8.06714 GPM |
| 3 m/s | 9.68057 GPM |
| 4 m/s | 12.9074 GPM |
| 5 m/s | 16.1343 GPM |
| 8 m/s | 25.8149 GPM |
Quick answers
Quick answers
- How many m/s is 1 GPM?
- 1 GPM is 0.309899 m/s.
- How many m/s is 10 GPM?
- 10 GPM is 3.09899 m/s.
The units
About these units
US gallons per minute (GPM)
The US flow unit for pumps and fixtures.
Meters per second (m/s)
The design unit: most systems aim for 1 to 2.
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