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Volumetric Flow Rate

gph (US)tocfs

Convert US gallons per hour (gph (US)) to cubic feet per second (cfs).

Factor1 gph (US) = 3.713349e-5 cfs

Converter

gph (US)

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

Result
0.371335cfs

Rendered to 6 significant figures.

Formula

Formula
cfs = gph (US) × 3.713349e-5

Multiply any value in US gallons per hour by 3.713349e-5 to obtain the value in cubic feet per second.

Worked example

Convert 10000 gph (US) to cfs.

  1. 01Start with 10000 gph (US).
  2. 02Multiply by the conversion factor: 10000 × 3.713349e-5 = 0.371335 cfs.
Result10000 gph (US) = 0.371335 cfs

Conversion table

gph (US)cfs
13.7133e-5
27.4267e-5
50.00018567
100.00037133
200.00074267
500.0018567
1000.0037133
2000.0074267
5000.018567
10000.037133

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gph (US) to cfs?
1 gph (US) equals 3.713349e-5 cfs. To convert, multiply the value in US gallons per hour by 3.713349e-5.
How do I convert 1 gph (US) to cfs?
1 gph (US) = 3.71335e-5 cfs. For any value, multiply by 3.713349e-5.
How do I convert cfs back to gph (US)?
Divide by the same factor — or equivalently, multiply by 26929.87. So 1 cfs = 26929.9 gph (US).
When would I need to convert US gallon per hour to cubic foot 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. gph (US) to cfs 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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