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Mass Flow Rate

lb/hrtolb/s

Convert pounds per hour (lb/hr) to pounds per second (lb/s).

Factor1 lb/hr = 0.0002777778 lb/s

Converter

lb/hr

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

Result
1lb/s

Rendered to 6 significant figures.

Formula

Formula
lb/s = lb/hr × 0.0002777778

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

Worked example

Convert 3600 lb/hr to lb/s.

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

Conversion table

lb/hrlb/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/hr to lb/s?
1 lb/hr equals 0.0002777778 lb/s. To convert, multiply the value in pounds per hour by 0.0002777778.
How do I convert 1 lb/hr to lb/s?
1 lb/hr = 0.000277778 lb/s. For any value, multiply by 0.0002777778.
How do I convert lb/s back to lb/hr?
Divide by the same factor — or equivalently, multiply by 3600. So 1 lb/s = 3600 lb/hr.
When would I need to convert pound per hour to pound per second?
Mass flow conversions between lb/hr and lb/s are common in material balances, process stream summaries, bulk solids handling, custody transfer, and equipment sizing where kg/hr, t/hr, lb/hr, and lb/s may all appear in different datasheets or vendor documents.
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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