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Volumetric Flow Rate

ft³/hrtocfs

Convert cubic feet per hour (ft³/hr) to cubic feet per second (cfs).

Factor1 ft³/hr = 0.0002777778 cfs

Converter

ft³/hr

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

Result
1cfs

Rendered to 6 significant figures.

Formula

Formula
cfs = ft³/hr × 0.0002777778

Multiply any value in cubic feet per hour by 0.0002777778 to obtain the value in cubic feet per second.

Worked example

Convert 3600 ft³/hr to cfs.

  1. 01Start with 3600 ft³/hr.
  2. 02Multiply by the conversion factor: 3600 × 0.0002777778 = 1 cfs.
Result3600 ft³/hr = 1 cfs

Conversion table

ft³/hrcfs
10.00027778
20.00055556
50.0013889
100.0027778
200.0055556
500.013889
1000.027778
2000.055556
5000.13889
10000.27778

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ft³/hr to cfs?
1 ft³/hr equals 0.0002777778 cfs. To convert, multiply the value in cubic feet per hour by 0.0002777778.
How do I convert 1 ft³/hr to cfs?
1 ft³/hr = 0.000277778 cfs. For any value, multiply by 0.0002777778.
How do I convert cfs back to ft³/hr?
Divide by the same factor — or equivalently, multiply by 3600. So 1 cfs = 3600 ft³/hr.
When would I need to convert cubic foot 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. ft³/hr 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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