Pounds per Second to Kilograms per Second (lb/s to kg/s)
1 pound per second (lb/s) = 0.45359237 kilograms per second (kg/s). 1 kg/s = 2.204622622 lb/s. Example: 15 lb/s = 15 × 0.45359237 = 6.80388555 kg/s.
Also searched as pounds per second to kg/s, pounds per second in kg/s, pounds per second into kilograms per second, lb/s to kg/s, lb/s in kilograms per second, lb/s into kilogram per second, pound per second to kilogram per second, lb/s to kilograms per second converter and how many kilograms per second in a pound per second.
1 lb/s = 0.45359237 kg/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound per second to kilogram per second converter to paste a column from Excel.
How to Convert Pound per Second to Kilogram per Second
- 1 lb/s = 0.45359237 kg/s
- 1 kg/s = 2.204622622 lb/s
- Example: convert 15 lb/s to kg/s: 15 lb/s = 15 × 0.45359237 kg/s = 6.80388555 kg/s
Formula
kg/s = lb/s × 0.45359237
or kg/s = lb/s ÷ 2.204622621849
Derivation from SI units:
- 1 lb/s = 0.45359237 kg/s.
- Mass per unit time: kg/s.
Both units are defined exactly, so the factor is exact. Pound per Second definition: pound per second; Kilogram per Second definition: kilogram per second.
Worked examples
- A reading of 10 lb/s converts to 4.5359237 kg/s.
10 lb/s × 0.45359237 = 4.5359237 kg/s - A value of 200 lb/s is 90.718474 kg/s.
200 lb/s × 0.45359237 = 90.718474 kg/s
Pound per Second to Kilogram per Second conversion table
| Pounds per Second (lb/s) | Kilograms per Second (kg/s) |
|---|---|
| 0.1 lb/s | 0.045359237 kg/s |
| 1 lb/s | 0.45359237 kg/s |
| 5 lb/s | 2.26796185 kg/s |
| 10 lb/s | 4.5359237 kg/s |
| 50 lb/s | 22.6796185 kg/s |
| 100 lb/s | 45.359237 kg/s |
| 200 lb/s | 90.718474 kg/s |
| 500 lb/s | 226.796185 kg/s |
| 1000 lb/s | 453.59237 kg/s |
| 2000 lb/s | 907.18474 kg/s |
Where it's used
Pounds per Second are used for gas turbine and jet engine air flow, while kilograms per second appear in mass and energy balances. Both measure mass flow rate ṁ, so the conversion is a fixed factor.
Pound per Second to other mass flow rate units
| Conversion | 1 lb/s equals |
|---|---|
| pound per second to kilogram per second | 0.45359237 kg/s |
| pound per second to kilogram per hour | 1632.932532 kg/h |
| pound per second to tonne per hour | 1.632932532 t/h |
| pound per second to tonne per day | 39.19038077 t/day |
| pound per second to pound per hour | 3600 lb/h |
| pound per second to gram per second | 453.59237 g/s |
| pound per second to kilogram per minute | 27.2155422 kg/min |
| pound per second to pound per minute | 60 lb/min |
Frequently asked questions
How many kilograms per second are in 1 pound per second?
1 lb/s = 0.45359237 kg/s.
How do I convert pounds per second to kilograms per second?
Multiply the value in lb/s by 0.45359237, or divide it by 2.204622622. For example, 15 lb/s × 0.45359237 = 6.80388555 kg/s.
Is the lb/s to kg/s conversion exact?
Yes. Both units are defined exactly, and 1 lb/s is exactly 0.45359237 kg/s.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound per second".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Pounds per Second to Kilograms per Second (lb/s to kg/s). Retrieved October 29, 2026, from https://scientificconverters.com/mass-flow-rate/pounds-per-second-to-kilograms-per-second/
IEEE
Scientific Converters, "Pounds per Second to Kilograms per Second (lb/s to kg/s)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/mass-flow-rate/pounds-per-second-to-kilograms-per-second/