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Viscosity

lb/(ft·hr)tolb/(ft·s)

Convert pounds per foot-hour (lb/(ft·hr)) to pounds per foot-second (lb/(ft·s)).

Factor1 lb/(ft·hr) = 0.0002777778 lb/(ft·s)

Converter

lb/(ft·hr)

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

Result
1lb/(ft·s)

Rendered to 6 significant figures.

Formula

Formula
lb/(ft·s) = lb/(ft·hr) × 0.0002777778

Multiply any value in pounds per foot-hour by 0.0002777778 to obtain the value in pounds per foot-second.

Worked example

Convert 3600 lb/(ft·hr) to lb/(ft·s).

  1. 01Start with 3600 lb/(ft·hr).
  2. 02Multiply by the conversion factor: 3600 × 0.0002777778 = 1 lb/(ft·s).
Result3600 lb/(ft·hr) = 1 lb/(ft·s)

Conversion table

lb/(ft·hr)lb/(ft·s)
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 lb/(ft·hr) to lb/(ft·s)?
1 lb/(ft·hr) equals 0.0002777778 lb/(ft·s). To convert, multiply the value in pounds per foot-hour by 0.0002777778.
How do I convert 1 lb/(ft·hr) to lb/(ft·s)?
1 lb/(ft·hr) = 0.000277778 lb/(ft·s). For any value, multiply by 0.0002777778.
How do I convert lb/(ft·s) back to lb/(ft·hr)?
Divide by the same factor — or equivalently, multiply by 3600. So 1 lb/(ft·s) = 3600 lb/(ft·hr).
When would I need to convert pound per foot-hour to pound per foot-second?
Dynamic viscosity conversions between lb/(ft·hr) and lb/(ft·s) are common in fluid characterisation, pump and control valve sizing, pipeline pressure-drop calculations, and lubrication engineering. Centipoise (cP) and mPa·s are the most widely used units in process datasheets; Pa·s is required for most simulation tools.
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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