Mass flow rate converter
Type a mass flow rate, choose the units, and see the result in every common unit. Useful for steam, fuel, feed and process data quoted in different mass and time units.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Type a number. A dot or a comma works as the decimal separator.
- Choose the unit you have and the unit you need. The ⇄ button swaps them.
- The table shows the same flow in all common units at once.
Conversion factors
Every unit is converted through kg/s.
| Unit |
In kg/s |
| 1 kg/min |
0.016667 |
| 1 kg/h |
0.00027778 |
| 1 t/h |
0.27777778 |
| 1 t/day |
0.011574 |
| 1 lb/s |
0.45359237 |
| 1 lb/h |
0.00012600 |
| 1 short ton/h |
0.25199577 |
A day is 86,400 seconds and an hour is 3,600 seconds.
Worked example
A boiler makes steam at 12,000 lb/h. That is 12,000 × 0.45359237 = 5,443 kg/h, or 1.512 kg/s, or 5.44 t/h.
Tips
- Mass flow does not change with temperature or pressure, unlike volume flow.
- Check which “ton” a datasheet means before converting.
Frequently asked questions
How many lb/h is 1 kg/s?
1 kg/s is 3,600 kg/h, which is 3,600 ÷ 0.45359237 = 7,936.64 lb/h.
What tonne does this use?
The metric tonne of 1,000 kg, written t. The short ton, 2,000 lb or 907.18474 kg, is listed separately as short ton/h. The long ton is not included.
How do I convert a mass flow into a volume flow?
Divide by the density of the fluid at the operating temperature and pressure. The result depends on the fluid, so this tool only converts mass units and time units.
How many kg/h is 1 tonne per day?
1,000 kg ÷ 24 h = 41.667 kg/h.