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Mass Flow Rate

lb/daytost/day

Convert pounds per day (lb/day) to short tons per day (st/day).

Factor1 lb/day = 0.0005 st/day

Converter

lb/day

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

Result
5st/day

Rendered to 6 significant figures.

Formula

Formula
st/day = lb/day × 0.0005

Multiply any value in pounds per day by 0.0005 to obtain the value in short tons per day.

Worked example

Convert 10000 lb/day to st/day.

  1. 01Start with 10000 lb/day.
  2. 02Multiply by the conversion factor: 10000 × 0.0005 = 5 st/day.
Result10000 lb/day = 5 st/day

Conversion table

lb/dayst/day
10.0005
20.001
50.0025
100.005
200.01
500.025
1000.05
2000.1
5000.25
10000.5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/day to st/day?
1 lb/day equals 0.0005 st/day. To convert, multiply the value in pounds per day by 0.0005.
How do I convert 1 lb/day to st/day?
1 lb/day = 0.0005 st/day. For any value, multiply by 0.0005.
How do I convert st/day back to lb/day?
Divide by the same factor — or equivalently, multiply by 2000. So 1 st/day = 2000 lb/day.
When would I need to convert pound per day to short ton per day?
Mass flow conversions between lb/day and st/day 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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