Is Mass Flow Rate Converter free to use?

Yes, Mass Flow Rate Converter is completely free. No subscription, no credit card, and no account required — ever.

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Is Mass Flow Rate Converter safe? Does it store my data?

Mass Flow Rate Converter processes your data locally in your browser. Nothing is sent to or stored on our servers.

How do I use Mass Flow Rate Converter?

Open the tool, enter or paste your input, and your result appears instantly. Use the copy button to save it. The whole process takes under a minute.

Mass flow Converter

Convert between kg/s, lb/min, and other mass flow rates.

Convert Units

Result:

Convert mass flow rate measurements between kilogram per second, pound per minute, metric ton per hour, and more.

What is Mass Flow Rate Converter?

Mass flow rate measures how much mass of a substance passes through a cross-section per unit time. Unlike volume flow rate, it is independent of pressure and temperature changes — making it the preferred measurement in chemical engineering, combustion, HVAC, and fuel systems.

Understanding the Units

Kilogram per second (kg/s)

The SI unit of mass flow rate.

Common Uses: Scientific and engineering calculations, turbines, compressors

Pound per minute (lb/min)

Imperial mass flow rate unit.

Common Uses: US industrial processes, HVAC, refrigeration

Conversion: 1 kg/s ≈ 132.277 lb/min

Metric ton per hour (t/h)

Metric ton (1,000 kg) per hour.

Common Uses: Mining, heavy industry, bulk material conveying

Conversion: 1 kg/s = 3.6 t/h

Common Conversions

Human breathing (at rest): ~0.009 kg/s air = 0.54 kg/min
Car engine fuel consumption: ~0.003–0.01 kg/s at highway speed
Industrial steam pipe: 10–100 kg/s
Amazon River: ~200,000 m³/s ≈ 200,000 t/s water flow

Conversion Formulas

Mass flow rate = Density × Volume flow rate (ṁ = ρ × Q)
Mass flow rate = Mass ÷ Time (ṁ = m/t)
kg/s to lb/min: lb/min = kg/s × 132.277
kg/s to t/h: t/h = kg/s × 3.6
t/h to kg/s: kg/s = t/h ÷ 3.6

Practical Examples

Natural gas pipeline: flow measured in kg/s to account for pressure variation

Large rocket engine: consumes ~400 kg/s of fuel and oxidiser at launch

Air conditioning system: airflow in kg/s determines cooling capacity

Chemical reactor: precise mass flow ratios ensure correct reaction stoichiometry

When to Use Each Unit

kg/s: Engineering calculations, scientific work, international standards

lb/min: US industrial processes, HVAC, refrigeration systems

t/h (tonnes/hour): Mining, bulk material handling, heavy industry

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