maratoolHow to convert mass flow rates (kg/h, lb/h, t/h)
Type a mass flow — read kg/s, kg/h, t/h, lb/s, or lb/h instantly.
Process datasheets mix kg/h, t/h, and lb/h across vendors. The Mass Flow Rate Converter normalizes them through kg/s with exact time and pound factors.
How it works
- Pick units — "Kilogram per hour (kg/h)" to "Pound per hour (lb/h)", or any other pair.
- Type a value — the result updates as you type, with swap and copy.
- Copy — one click, with "Copied!" feedback.
Mass flow rate conversion factors
Every unit converts through the kilogram per second (the base unit). To convert A → B, multiply by A's factor and divide by B's:
| Unit | = this many kilogram per seconds |
|---|---|
| Kilogram per second (kg/s) | 1 |
| Kilogram per minute (kg/min) | 0.016666666667 |
| Kilogram per hour (kg/h) | 0.000277777778 |
| Gram per second (g/s) | 0.001 |
| Tonne per hour (t/h) | 0.277777777778 |
| Pound per second (lb/s) | 0.45359237 |
| Pound per minute (lb/min) | 0.007559872833 |
| Pound per hour (lb/h) | 0.000125997881 |
When you need it
Steam boilers are often rated in lb/h in the US and t/h elsewhere — 10,000 lb/h is 4.536 t/h. For gas systems specced volumetrically (SCFM, Nm³/h), convert to mass with density first, or use the Flow Rate Converter.
Sources & methodology
Conversion factors follow NIST Special Publication 811; exact-by-definition factors are marked in the tool itself. All math runs client-side in your browser — nothing is uploaded.
More conversion guides
- How to convert GPM to L/min and CFM to m³/h
- How to convert density between kg/m³, g/cm³, and lb/ft³
- How to convert moles, millimoles, and micromoles
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