Fluids converters
Flow - Mass Converter
Convert mass flow rates such as kg/s, tonnes per hour and pounds per hour.
Result
220.462 lb/h
100 kg/h = 220.462 lb/h
All units for this value
| Unit | Symbol | Value |
|---|---|---|
| Kilogram per second | kg/s | 0.0277778 |
| Kilogram per minute | kg/min | 1.66667 |
| Kilogram per hour | kg/h | 100 |
| Kilogram per day | kg/day | 2400 |
| Gram per second | g/s | 27.7778 |
| Gram per minute | g/min | 1666.67 |
| Gram per hour | g/h | 100000 |
| Milligram per second | mg/s | 27777.8 |
| Tonne per hour | t/h | 0.1 |
| Tonne per day | t/day | 2.4 |
| Pound per second | lb/s | 0.0612395 |
| Pound per minute | lb/min | 3.67437 |
| Pound per hour | lb/h | 220.462 |
| Pound per day | lb/day | 5291.09 |
| Ounce per second | oz/s | 0.979832 |
| Ounce per minute | oz/min | 58.7899 |
| Short ton per hour | ton/h | 0.110231 |
| Long ton per hour | long ton/h | 0.0984207 |
About this calculator
Mass flow rate measures how much mass of a substance moves past a point over time, such as kilograms of steam or pounds of powder per hour in an industrial process. This converter switches between metric units like kilograms and tonnes per hour and US or Imperial units like pounds and short tons per hour.
How it works in plain English
Every unit here is a mass divided by a time, so the converter anchors all of them to kilograms per second and rescales your entered value through that shared base. Metric masses such as kilograms, grams, milligrams, and tonnes combine with time units from seconds to days using the usual powers of ten and standard time-unit factors.
US and Imperial masses bring in the pound (0.45359237 kg), the ounce (0.028349523125 kg), the short ton (907.18474 kg) common in the United States, and the long ton (1016.0469088 kg) used in the UK, each of which needs its own factor before comparison with a metric figure. A tonne per hour, sometimes written t/h, equals 1000 kg divided by 3600 seconds, which is why it sits between a kilogram-per-second and a kilogram-per-minute figure in scale.
Choose your from and to units, type a value, and the converted mass flow rate appears immediately alongside a table listing that same rate in every supported unit. A precision selector controls the number of decimal places shown, and a swap button flips the conversion direction in one click.
The formula
- value_in_target = value_in_source × (source factor to kg/s) ÷ (target factor to kg/s)
- 1 pound/hour = 0.45359237 ÷ 3600 = 0.000125998 kg/s
- 1 tonne/hour = 1000 ÷ 3600 = 0.277778 kg/s
- 1 short ton/hour = 907.18474 ÷ 3600 = 0.251996 kg/s
Worked example
Suppose a conveyor system report lists a material feed rate of 2000 pounds per hour and a plant engineer wants that expressed in kilograms per hour for a metric process log. Multiplying 2000 by the pound factor of 0.45359237 kg gives 907.18474 kg per hour.
Entering 2000 into the pound-per-hour field with kilogram-per-hour selected as the target shows about 907.18 kg/h immediately. As a check, converting that result down to kilograms per second gives 907.18474 ÷ 3600, or about 0.252 kg/s, matching the shared-base value used internally by the converter.
The full unit table also reports this same rate as roughly 0.907 t/h and about 0.252 kg/s, all computed from that single entered value. Scanning across that all-units table is a quick way to sanity-check a conversion, since the tonne, kilogram, and pound figures describe the same physical feed rate at different scales.
Common mass flow rate conversion factors
| Unit | Value in kg/s |
|---|---|
| 1 kilogram/hour | 0.000277778 |
| 1 tonne/hour | 0.277778 |
| 1 pound/hour | 0.000125998 |
| 1 pound/second | 0.45359237 |
| 1 short ton/hour | 0.251996 |
| 1 long ton/hour | 0.282235 |
Standard unit definitions
Frequently asked questions
What is the difference between a short ton and a long ton?
A short ton, common in the United States, equals 907.18474 kg, while a long ton, used more often in the United Kingdom, equals 1016.0469088 kg. This converter treats them as separate units because using the wrong one can introduce a difference of over 10% in a mass flow figure.
Why is a tonne per hour a convenient unit for industrial flow rates?
A tonne per hour describes flow in terms of metric tons over a familiar operational time span, which lines up well with hourly production or throughput reporting in bulk material handling, chemical processing, and similar industries. It also sits at a scale that avoids excessively small or large numbers for typical plant equipment.
How does the converter handle grams versus kilograms?
A gram is one-thousandth of a kilogram, so every gram-based unit's factor is scaled down by 1000 relative to the equivalent kilogram-based unit before conversion. This means switching between gram-per-second and kilogram-per-hour, for example, is handled automatically without any manual unit-prefix arithmetic.
Can I convert an ounce-per-minute figure into metric units?
Yes. Select ounce-per-minute as the from unit and a metric unit such as gram-per-second or kilogram-per-hour as the target, then enter your value. The converter applies the exact ounce-to-kilogram factor of 0.028349523125 automatically as part of the calculation.
Is mass flow rate the same as volumetric flow rate?
No. Mass flow rate measures mass moved per unit time, such as kilograms per second, while volumetric flow rate measures volume moved per unit time, such as liters per second. The two are related by the fluid's density, but converting between them requires knowing that density, which this converter does not assume.
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