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Mass Flow Rate

lb/stokg/s

Convert pounds per second (lb/s) to kilograms per second (kg/s).

Factor1 lb/s = 0.4535924 kg/s

Converter

lb/s

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

Result
4.53592kg/s

Rendered to 6 significant figures.

Formula

Formula
kg/s = lb/s × 0.4535924

Multiply any value in pounds per second by 0.4535924 to obtain the value in kilograms per second.

Worked example

Convert 10 lb/s to kg/s.

  1. 01Start with 10 lb/s.
  2. 02Multiply by the conversion factor: 10 × 0.4535924 = 4.53592 kg/s.
Result10 lb/s = 4.53592 kg/s

Conversion table

lb/skg/s
10.45359
20.90718
52.268
104.5359
209.0718
5022.68
10045.359
20090.718
500226.8
1000453.59

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/s to kg/s?
1 lb/s equals 0.4535924 kg/s. To convert, multiply the value in pounds per second by 0.4535924.
How do I convert 1 lb/s to kg/s?
1 lb/s = 0.453592 kg/s. For any value, multiply by 0.4535924.
How do I convert kg/s back to lb/s?
Divide by the same factor — or equivalently, multiply by 2.204623. So 1 kg/s = 2.20462 lb/s.
When would I need to convert pound per second to kilogram per second?
Mass flow conversions between lb/s and kg/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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