Mass Flow Rate
lb/daytokg/day
Convert pounds per day (lb/day) to kilograms per day (kg/day).
Factor1 lb/day = 0.4535924 kg/day
Converter
lb/day
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kg/day
Rendered to 6 significant figures.
Formula
Formula
kg/day = lb/day × 0.4535924
Multiply any value in pounds per day by 0.4535924 to obtain the value in kilograms per day.
Worked example
Convert 1000 lb/day to kg/day.
- 01Start with 1000 lb/day.
- 02Multiply by the conversion factor: 1000 × 0.4535924 = 453.592 kg/day.
Result1000 lb/day = 453.592 kg/day
Conversion table
| lb/day | kg/day |
|---|---|
| 1 | 0.45359 |
| 2 | 0.90718 |
| 5 | 2.268 |
| 10 | 4.5359 |
| 20 | 9.0718 |
| 50 | 22.68 |
| 100 | 45.359 |
| 200 | 90.718 |
| 500 | 226.8 |
| 1000 | 453.59 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from lb/day to kg/day?
1 lb/day equals 0.4535924 kg/day. To convert, multiply the value in pounds per day by 0.4535924.
How do I convert 1 lb/day to kg/day?
1 lb/day = 0.453592 kg/day. For any value, multiply by 0.4535924.
How do I convert kg/day back to lb/day?
Divide by the same factor — or equivalently, multiply by 2.204623. So 1 kg/day = 2.20462 lb/day.
When would I need to convert pound per day to kilogram per day?
Mass flow conversions between lb/day and kg/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).