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Volumetric Flow Rate

gpm (US)tom³/s

Convert US gallons per minute (gpm (US)) to cubic metres per second (m³/s).

Factor1 gpm (US) = 6.30902e-5 m³/s

Converter

gpm (US)

Accepts numbers or expressions, e.g. 150 + 14.7

Result
0.00630902m³/s

Rendered to 6 significant figures.

Formula

Formula
m³/s = gpm (US) × 6.30902e-5

Multiply any value in US gallons per minute by 6.30902e-5 to obtain the value in cubic metres per second.

Worked example

Convert 100 gpm (US) to m³/s.

  1. 01Start with 100 gpm (US).
  2. 02Multiply by the conversion factor: 100 × 6.30902e-5 = 0.00630902 m³/s.
Result100 gpm (US) = 0.00630902 m³/s

Conversion table

gpm (US)m³/s
16.309e-5
20.00012618
50.00031545
100.0006309
200.0012618
500.0031545
1000.006309
2000.012618
5000.031545
10000.06309

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm (US) to m³/s?
1 gpm (US) equals 6.30902e-5 m³/s. To convert, multiply the value in US gallons per minute by 6.30902e-5.
How do I convert 1 gpm (US) to m³/s?
1 gpm (US) = 6.30902e-5 m³/s. For any value, multiply by 6.30902e-5.
How do I convert m³/s back to gpm (US)?
Divide by the same factor — or equivalently, multiply by 15850.32. So 1 m³/s = 15850.3 gpm (US).
When would I need to convert US gallon per minute to cubic metre per second?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. gpm (US) to m³/s is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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