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Mass Flow Rate

lb/daytokg/s

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

Factor1 lb/day = 5.249912e-6 kg/s

Converter

lb/day

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

Result
5.24991kg/s

Rendered to 6 significant figures.

Formula

Formula
kg/s = lb/day × 5.249912e-6

Multiply any value in pounds per day by 5.249912e-6 to obtain the value in kilograms per second.

Worked example

Convert 1.00000e+6 lb/day to kg/s.

  1. 01Start with 1.00000e+6 lb/day.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 5.249912e-6 = 5.24991 kg/s.
Result1.00000e+6 lb/day = 5.24991 kg/s

Conversion table

lb/daykg/s
15.2499e-6
21.05e-5
52.625e-5
105.2499e-5
200.000105
500.0002625
1000.00052499
2000.00105
5000.002625
10000.0052499

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/day to kg/s?
1 lb/day equals 5.249912e-6 kg/s. To convert, multiply the value in pounds per day by 5.249912e-6.
How do I convert 1 lb/day to kg/s?
1 lb/day = 5.24991e-6 kg/s. For any value, multiply by 5.249912e-6.
How do I convert kg/s back to lb/day?
Divide by the same factor — or equivalently, multiply by 190479.4. So 1 kg/s = 190479 lb/day.
When would I need to convert pound per day to kilogram per second?
Mass flow conversions between lb/day 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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