Kilogram per Second (kg/s)
The kilogram per second is the SI unit of mass flow rate ṁ, used in energy balances Q̇ = ṁ c ΔT and turbine and boiler problems.
Symbol: kg/s
Quantity: mass flow rate ṁ
SI relation: kg/s is the coherent SI unit of mass flow rate.
Derivation: Mass per unit time: kg/s.
Exact: yes, by definition
Typical uses
- Mass and energy balances
- Steam turbine and boiler problems
- Jet engine air flow
Convert kilograms per second to other units
| Conversion | 1 kg/s equals | Reverse |
|---|---|---|
| kilogram per second to kilogram per hour | 3600 kg/h | kilogram per hour to kilogram per second |
| kilogram per second to tonne per hour | 3.6 t/h | tonne per hour to kilogram per second |
| kilogram per second to tonne per day | 86.4 t/day | tonne per day to kilogram per second |
| kilogram per second to pound per hour | 7936.641439 lb/h | pound per hour to kilogram per second |
| kilogram per second to gram per second | 1000 g/s | gram per second to kilogram per second |
| kilogram per second to kilogram per minute | 60 kg/min | kilogram per minute to kilogram per second |
| kilogram per second to pound per second | 2.204622622 lb/s | pound per second to kilogram per second |
| kilogram per second to pound per minute | 132.2773573 lb/min | pound per minute to kilogram per second |
Open the Mass Flow Rate Converter (kg/s, kg/h, t/h, lb/h) to convert any value between all units.
Sources
- 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). Kilogram per Second (kg/s). Retrieved October 29, 2026, from https://scientificconverters.com/units/kilogram-per-second/
IEEE
Scientific Converters, "Kilogram per Second (kg/s)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/kilogram-per-second/