Convert Pounds per Hour to Pounds per Second (lb/h to lb/s)
1 pound per hour (lb/h) = 0.0002777777778 pounds per second (lb/s). 1 lb/s = 3600 lb/h. Example: 15 lb/h = 15 × 0.0002777777778 = 0.004166666667 lb/s.
Also searched as pounds per hour to lb/s, pounds per hour in lb/s, pounds per hour into pounds per second, lb/h to lb/s, lb/h in pounds per second, lb/h into pound per second, pound per hour to pound per second, lb/h to pounds per second converter and how many pounds per second in a pound per hour.
1 lb/h = 0.0002777777778 lb/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound per hour to pound per second converter to paste a column from Excel.
How to Convert Pound per Hour to Pound per Second
- 1 lb/h = 0.0002777777778 lb/s
- 1 lb/s = 3600 lb/h
- Example: convert 15 lb/h to lb/s: 15 lb/h = 15 × 0.0002777777778 lb/s = 0.004166666667 lb/s
Formula
lb/s = lb/h × 0.0002777777777778
or lb/s = lb/h ÷ 3600
Derivation from SI units:
- 1 lb/h = 0.45359237/3600 kg/s.
- 1 lb/s = 0.45359237 kg/s.
- 1 lb/h = 0.0001259978805556 kg/s ÷ 0.45359237 kg/s per lb/s = 0.0002777777777778 lb/s
Both units are defined exactly, so the factor is exact. Pound per Hour definition: pound per hour; Pound per Second definition: pound per second.
Worked examples
- A reading of 1000 lb/h converts to 0.2777777778 lb/s.
1000 lb/h × 0.0002777777778 = 0.2777777778 lb/s - A value of 25000 lb/h is 6.944444444 lb/s.
25000 lb/h × 0.0002777777778 = 6.944444444 lb/s
Pound per Hour to Pound per Second conversion table
| Pounds per Hour (lb/h) | Pounds per Second (lb/s) |
|---|---|
| 10 lb/h | 0.002777777778 lb/s |
| 100 lb/h | 0.02777777778 lb/s |
| 500 lb/h | 0.1388888889 lb/s |
| 1000 lb/h | 0.2777777778 lb/s |
| 5000 lb/h | 1.388888889 lb/s |
| 10000 lb/h | 2.777777778 lb/s |
| 25000 lb/h | 6.944444444 lb/s |
| 50000 lb/h | 13.88888889 lb/s |
| 100000 lb/h | 27.77777778 lb/s |
| 500000 lb/h | 138.8888889 lb/s |
Where it's used
Pounds per Hour are used for US boiler and steam ratings, while pounds per second appear in gas turbine and jet engine air flow. Both measure mass flow rate ṁ, so the conversion is a fixed factor.
Pound per Hour to other mass flow rate units
| Conversion | 1 lb/h equals |
|---|---|
| pound per hour to pound per second | 0.0002777777778 lb/s |
| pound per hour to kilogram per second | 0.0001259978806 kg/s |
| pound per hour to kilogram per hour | 0.45359237 kg/h |
| pound per hour to tonne per hour | 0.00045359237 t/h |
| pound per hour to tonne per day | 0.01088621688 t/day |
| pound per hour to gram per second | 0.1259978806 g/s |
| pound per hour to kilogram per minute | 0.007559872833 kg/min |
| pound per hour to pound per minute | 0.01666666667 lb/min |
Frequently asked questions
How many pounds per second are in 1 pound per hour?
1 lb/h = 0.0002777777778 lb/s.
How do I convert pounds per hour to pounds per second?
Multiply the value in lb/h by 0.0002777777778, or divide it by 3600. For example, 15 lb/h × 0.0002777777778 = 0.004166666667 lb/s.
Is the lb/h to lb/s conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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 hour".
- 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".
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). Convert Pounds per Hour to Pounds per Second (lb/h to lb/s). Retrieved October 29, 2026, from https://scientificconverters.com/mass-flow-rate/pounds-per-hour-to-pounds-per-second/
IEEE
Scientific Converters, "Convert Pounds per Hour to Pounds per Second (lb/h to lb/s)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/mass-flow-rate/pounds-per-hour-to-pounds-per-second/