Mass Flow Rate Converter — kg/s, kg/h & lb/h

Convert between kilograms per second, kilograms per hour, tonnes per hour, and pounds per hour.

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How this conversion works. Every rate is converted through kg/s (SI); time factors are exact fractions and the pound uses the exact NIST definition in NIST Special Publication 811.

How to use

  1. Pick the unit you are converting from, such as Kilogram per second (kg/s) or Kilogram per minute (kg/min).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Pound per hour (lb/h) included.

Frequently asked questions

How do I convert kilogram per hour to pound per hour?

1 kilogram per hour = 2.20462 pound per hour. Choose "Kilogram per hour (kg/h)" as From and "Pound per hour (lb/h)" as To, type a value, and the result updates instantly.

How do I convert kg/h to lb/h?

Multiply by 2.20462: 100 kg/h = 220.46 lb/h. The factor is the exact pound definition, 1 lb = 0.45359237 kg.

How do I get mass flow from volumetric flow?

Multiply volumetric flow by density: ṁ = ρ × Q. Water at 10 L/min is about 10 kg/min; air at the same flow is roughly 800× less mass.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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