Flow rate (mass) converter
Mass flow for steam, fuel and bulk solids. Converting mass flow to volume flow needs the fluid’s density, which is a separate quantity.
1 pound per hour = 0.45359 kilograms per hour
How it’s calculated
kg/h = lb/h × 0.45359237
- Multiply the value in pounds per hour by 0.45359237.
- To go back, divide by 0.45359237 (or multiply by 2.204622622).
- 1 lb/h = 0.45359237 kg/h · 1 kg/h = 2.204622622 lb/h
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 lb/h = 0.000125997880555556 kg/s and 1 kg/h = 0.000277777777777778 kg/s, so 1 lb/h = 0.45359237 kg/h. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.) (SI prefixes and accepted units).
Multiply by the factor written as a fraction
Put lb/h in the denominator so it cancels, leaving kg/h.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 0.45359 kg/h
1 lb/h in other units
Batch convert lb/h → kg/h
- 1 lb/h = 0.45359 kg/h
- 5 lb/h = 2.268 kg/h
- 10 lb/h = 4.5359 kg/h
- 25 lb/h = 11.34 kg/h
Common flow rate (mass) conversions
Flow rate (mass) units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Kilogram per second (kg/s) | SI (metric) | Base unit |
| Kilogram per minute (kg/min) | metric (non-SI) | 1 kg/min = 0.01666666667 kg/s |
| Kilogram per hour (kg/h) | metric (non-SI) | 1 kg/h = 0.0002777777778 kg/s |
| Gram per second (g/s) | SI (metric) | 1 g/s = 0.001 kg/s |
| Tonne per hour (t/h) | metric (non-SI) | 1 t/h = 0.2777777778 kg/s |
| Pound per second (lb/s) | US & imperial (identical) | 1 lb/s = 0.45359237 kg/s |
| Pound per minute (lb/min) | US & imperial (identical) | 1 lb/min = 0.007559872833 kg/s |
| Pound per hour (lb/h) | US & imperial (identical) | 1 lb/h = 0.0001259978806 kg/s |
Pounds per hour to kilograms per hour conversion table
| Pounds per hour (lb/h) | Kilograms per hour (kg/h) |
|---|---|
| 0.1 lb/h | 0.045359 kg/h |
| 0.5 lb/h | 0.2268 kg/h |
| 1 lb/h | 0.45359 kg/h |
| 2 lb/h | 0.90718 kg/h |
| 3 lb/h | 1.3608 kg/h |
| 4 lb/h | 1.8144 kg/h |
| 5 lb/h | 2.268 kg/h |
| 6 lb/h | 2.7216 kg/h |
| 7 lb/h | 3.1751 kg/h |
| 8 lb/h | 3.6287 kg/h |
| 9 lb/h | 4.0823 kg/h |
| 10 lb/h | 4.5359 kg/h |
| 15 lb/h | 6.8039 kg/h |
| 20 lb/h | 9.0718 kg/h |
| 25 lb/h | 11.34 kg/h |
| 30 lb/h | 13.608 kg/h |
| 40 lb/h | 18.144 kg/h |
| 50 lb/h | 22.68 kg/h |
| 75 lb/h | 34.019 kg/h |
| 100 lb/h | 45.359 kg/h |
| 250 lb/h | 113.4 kg/h |
| 500 lb/h | 226.8 kg/h |
| 1,000 lb/h | 453.59 kg/h |
Frequently asked questions
Which flow rate (mass) units can I convert?
kilograms per second (kg/s), kilograms per minute (kg/min), kilograms per hour (kg/h), grams per second (g/s), tonnes per hour (t/h), pounds per second (lb/s), pounds per minute (lb/min), pounds per hour (lb/h).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.