Convert Pounds per Second to Tonnes per Day (lb/s to t/day)
1 pound per second (lb/s) = 39.19038077 tonnes per day (t/day). 1 t/day = 0.02551646553 lb/s. Example: 15 lb/s = 15 × 39.19038077 = 587.8557115 t/day.
Also searched as pounds per second to t/day, pounds per second in t/day, pounds per second into tonnes per day, lb/s to t/day, lb/s in tonnes per day, lb/s into tonne per day, pound per second to tonne per day, lb/s to tonnes per day converter and how many tonnes per day in a pound per second.
1 lb/s = 39.19038077 t/day
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound per second to tonne per day converter to paste a column from Excel.
How to Convert Pound per Second to Tonne per Day
- 1 lb/s = 39.19038077 t/day
- 1 t/day = 0.02551646553 lb/s
- Example: convert 15 lb/s to t/day: 15 lb/s = 15 × 39.19038077 t/day = 587.8557115 t/day
Formula
t/day = lb/s × 39.190380768
Derivation from SI units:
- 1 lb/s = 0.45359237 kg/s.
- 1 t/day = 1000/86,400 kg/s.
- 1 lb/s = 0.45359237 kg/s ÷ 0.01157407407407 kg/s per t/day = 39.190380768 t/day
Both units are defined exactly, so the factor is exact. Pound per Second definition: pound per second; Tonne per Day definition: tonne per day.
Worked examples
- A reading of 10 lb/s converts to 391.9038077 t/day.
10 lb/s × 39.19038077 = 391.9038077 t/day - A value of 200 lb/s is 7838.076154 t/day.
200 lb/s × 39.19038077 = 7838.076154 t/day
Pound per Second to Tonne per Day conversion table
| Pounds per Second (lb/s) | Tonnes per Day (t/day) |
|---|---|
| 0.1 lb/s | 3.919038077 t/day |
| 1 lb/s | 39.19038077 t/day |
| 5 lb/s | 195.9519038 t/day |
| 10 lb/s | 391.9038077 t/day |
| 50 lb/s | 1959.519038 t/day |
| 100 lb/s | 3919.038077 t/day |
| 200 lb/s | 7838.076154 t/day |
| 500 lb/s | 19595.19038 t/day |
| 1000 lb/s | 39190.38077 t/day |
| 2000 lb/s | 78380.76154 t/day |
Where it's used
Pounds per Second are used for gas turbine and jet engine air flow, while tonnes per day appear in chemical and fertiliser plant capacity. 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 tonne per day | 39.19038077 t/day |
| 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 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 tonnes per day are in 1 pound per second?
1 lb/s = 39.19038077 t/day.
How do I convert pounds per second to tonnes per day?
Multiply the value in lb/s by 39.19038077. For example, 15 lb/s × 39.19038077 = 587.8557115 t/day.
Is the lb/s to t/day 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 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). Convert Pounds per Second to Tonnes per Day (lb/s to t/day). Retrieved October 29, 2026, from https://scientificconverters.com/mass-flow-rate/pounds-per-second-to-tonnes-per-day/
IEEE
Scientific Converters, "Convert Pounds per Second to Tonnes per Day (lb/s to t/day)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/mass-flow-rate/pounds-per-second-to-tonnes-per-day/