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Volumetric Flow Rate

gpm (US)tocfm

Convert US gallons per minute (gpm (US)) to cubic feet per minute (cfm).

Factor1 gpm (US) = 0.1336806 cfm

Converter

gpm (US)

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

Result
13.3681cfm

Rendered to 6 significant figures.

Formula

Formula
cfm = gpm (US) × 0.1336806

Multiply any value in US gallons per minute by 0.1336806 to obtain the value in cubic feet per minute.

Worked example

Convert 100 gpm (US) to cfm.

  1. 01Start with 100 gpm (US).
  2. 02Multiply by the conversion factor: 100 × 0.1336806 = 13.3681 cfm.
Result100 gpm (US) = 13.3681 cfm

Conversion table

gpm (US)cfm
10.13368
20.26736
50.6684
101.3368
202.6736
506.684
10013.368
20026.736
50066.84
1000133.68

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm (US) to cfm?
1 gpm (US) equals 0.1336806 cfm. To convert, multiply the value in US gallons per minute by 0.1336806.
How do I convert 1 gpm (US) to cfm?
1 gpm (US) = 0.133681 cfm. For any value, multiply by 0.1336806.
How do I convert cfm back to gpm (US)?
Divide by the same factor — or equivalently, multiply by 7.480519. So 1 cfm = 7.48052 gpm (US).
When would I need to convert US gallon per minute to cubic foot per minute?
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 cfm is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
Yes. Both gpm (US) and cfm are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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