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Volumetric Flow Rate

cfstogph (US)

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

Factor1 cfs = 26929.87 gph (US)

Converter

cfs

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

Result
26929.9gph (US)

Rendered to 6 significant figures.

Formula

Formula
gph (US) = cfs × 26929.87

Multiply any value in cubic feet per second by 26929.87 to obtain the value in US gallons per hour.

Worked example

Convert 1 cfs to gph (US).

  1. 01Start with 1 cfs.
  2. 02Multiply by the conversion factor: 1 × 26929.87 = 26929.9 gph (US).
Result1 cfs = 26929.9 gph (US)

Conversion table

cfsgph (US)
126930
253860
51.3465e+5
102.6930e+5
205.3860e+5
501.3465e+6
1002.6930e+6
2005.3860e+6
5001.3465e+7
10002.693e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cfs to gph (US)?
1 cfs equals 26929.87 gph (US). To convert, multiply the value in cubic feet per second by 26929.87.
How do I convert 1 cfs to gph (US)?
1 cfs = 26929.9 gph (US). For any value, multiply by 26929.87.
How do I convert gph (US) back to cfs?
Divide by the same factor — or equivalently, multiply by 3.713349e-5. So 1 gph (US) = 3.71335e-5 cfs.
When would I need to convert cubic foot per second to US gallon per hour?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. cfs to gph (US) 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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