Flow (Mass) Converter

ConversionEdited by Hemant Kumar and Anjita Rai, founders · How we checkUpdated Free · No sign-up

Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 kg/s = 3,600 kg/h; 1 kg/s = 3.6 t/h; 1 kg/s = 7,936.641 lb/h. This converter covers 8 flow (mass) units.

Use the Flow (Mass) Converter

Flow (Mass) formula and what each symbol means

target = value × (factor of starting unit ÷ factor of target unit), where each factor is the unit value in kg/s.

Symbols used in the formula
SymbolMeaning
valueThe number you want to convert
factorThe unit’s size expressed in the base unit (kg/s)

Flow (Mass) examples

kg/s to kg/h

10 kg/s = 36,000 kg/h.

kg/s to t/h

10 kg/s = 36 t/h.

kg/s to lb/h

10 kg/s = 79,366.41 lb/h.

How to calculate Flow (Mass) step by step

  1. Choose the starting unit and the target unit.
  2. Enter your value.
  3. Read the converted value, plus the conversion factor in both directions.

Popular flow (mass) conversions

How to read your Flow (Mass) result

Mass flow is mass per unit time. The SI unit is kilogram per second. One tonne per hour is about 0.2778 kg/s and one pound per hour is about 1.26×10⁻⁴ kg/s.

UNITSYMBOLEQUALSVALUE OF 1 KG/S
Kilogram per secondkg/s1 kg/s = 1 kg/s1 kg/s
Gram per secondg/s1 g/s = 0.001 kg/s1,000 g/s
Kilogram per minutekg/min1 kg/min = 0.016666667 kg/s60 kg/min
Kilogram per hourkg/h1 kg/h = 0.00027777778 kg/s3,600 kg/h
Tonne per hourt/h1 t/h = 0.27777778 kg/s3.6 t/h
Pound per secondlb/s1 lb/s = 0.45359237 kg/s2.204623 lb/s
Pound per minutelb/min1 lb/min = 0.0075598728 kg/s132.2774 lb/min
Pound per hourlb/h1 lb/h = 0.00012599788 kg/s7,936.641 lb/h

Common mistakes when calculating Flow (Mass)

  • Confusing mass flow (kg/s) with volumetric flow (m³/s); density links them.
  • Mixing metric tonnes (1,000 kg) with US short tons.
  • Mixing kg/h and kg/s, which differ by a factor of 3,600.

Flow (Mass) FAQ

How many kg/s is 1 t/h?

About 0.27778 kg/s.

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

Divide by 3,600.

How do I get mass flow from volumetric flow?

Multiply the volumetric flow by the density of the fluid.

What is the base unit for flow (mass)?

This converter uses kilogram per second (kg/s) as the common base unit: every value is first converted to it and then to the target unit.

How do I convert between two flow (mass) units?

Choose the starting and target units, enter the value and read the result. By hand: convert to the base unit with the table, then divide by the target unit factor.

How many kilograms per hour are in 1 kilogram per second?

1 kg/s = 3,600 kg/h.

How many tonnes per hour are in 1 kilogram per second?

1 kg/s = 3.6 t/h.

How many pounds per hour are in 1 kilogram per second?

1 kg/s = 7,936.641 lb/h.

Which flow (mass) units does this converter support?

It covers 8 units: kilogram per second (kg/s), gram per second (g/s), kilogram per minute (kg/min), kilogram per hour (kg/h), tonne per hour (t/h), pound per second (lb/s), pound per minute (lb/min), pound per hour (lb/h).

How accurate is the flow (mass) converter?

Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.

More in Flow (Mass) converters

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Method, review and disclaimer

Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)