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Volumetric Flow Rate

gpm (US)tomL/s

Convert US gallons per minute (gpm (US)) to millilitres per second (mL/s).

Factor1 gpm (US) = 63.0902 mL/s

Converter

gpm (US)

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

Result
630.902mL/s

Rendered to 6 significant figures.

Formula

Formula
mL/s = gpm (US) × 63.0902

Multiply any value in US gallons per minute by 63.0902 to obtain the value in millilitres per second.

Worked example

Convert 10 gpm (US) to mL/s.

  1. 01Start with 10 gpm (US).
  2. 02Multiply by the conversion factor: 10 × 63.0902 = 630.902 mL/s.
Result10 gpm (US) = 630.902 mL/s

Conversion table

gpm (US)mL/s
163.09
2126.18
5315.45
10630.9
201261.8
503154.5
1006309
20012618
50031545
100063090

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm (US) to mL/s?
1 gpm (US) equals 63.0902 mL/s. To convert, multiply the value in US gallons per minute by 63.0902.
How do I convert 1 gpm (US) to mL/s?
1 gpm (US) = 63.0902 mL/s. For any value, multiply by 63.0902.
How do I convert mL/s back to gpm (US)?
Divide by the same factor — or equivalently, multiply by 0.01585032. So 1 mL/s = 0.0158503 gpm (US).
When would I need to convert US gallon per minute to millilitre 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 mL/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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