Flow Mass Converter
Convert mass flow rate between kilograms per second, grams per minute, pounds per hour, tons per day, and more.
How Flow Mass Conversion Works
Mass flow rate units use linear scaling — convert between units using conversion factors:
Example: 1 kg/s = 3600 kg/h
Actual Calculation
Why Trust This Converter?
Conversion Formula
Accuracy & Standards
Unit Relationship Diagram
Mass Flow Unit Comparison
| Unit | Symbol | Equals (in kg/s) | Used In |
|---|---|---|---|
| Kilogram per second | kg/s | 1 | 🌍 Worldwide |
| Gram per second | g/s | 0.001 | 🌍 Worldwide |
| Gram per minute | g/min | 1.6667e-5 | 🌍 Worldwide |
| Kilogram per hour | kg/h | 0.0002778 | 🌍 Worldwide |
| Pound per hour | lb/h | 0.0001260 | 🇺🇸 USA |
| Ton per day | t/d | 0.011574 | 🌍 Worldwide |
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How This Converter Works
This mass flow converter uses linear scaling — converting between units using multiplication factors based on the mass flow rate relationship.
Step 1: Convert input value using the "From" unit's factor
Step 2: Convert to the "To" unit using the target unit's factor
Real Examples
Limitations
- • This tool is for informational purposes only
- • Results should not be used for legal or certified measurements
- • Always verify critical calculations with official sources
Trust & Privacy
All calculations are performed locally in your browser. No personal information is stored or shared.
References
- BIPM SI Brochure – International System of Units
- NIST Special Publication 811 – Guide to SI Units
- ISO 80000-3 – Quantities and Units, Space and Time
References were selected from recognized standards organizations and are reviewed periodically for accuracy.
Editorial Process
The CalculatorKits editorial team reviews this tool periodically.
- Conversion formula accuracy
- Unit definitions and standards
- User guidance and clarity
- Educational content
Last reviewed: July 2026
Frequently Asked Questions
Enter a value, select the "From" and "To" units, and the result appears instantly.
We support kg/s, g/min, lb/h, t/d, kg/h, and many more.
Yes, it uses standard SI conversion factors and is accurate for all supported units.
1 kg/s = 3600 kg/h. This is a common conversion for mass flow rate.
Yes, your recent conversions are saved locally in your browser.
📍 Flow Mass Converter — For educational and informational use only
Flow Mass Converter: Convert Mass Flow Rate Units
When fluid movement is measured by mass rather than volume, you need a different type of conversion.
A Flow Mass Converter is designed for mass flow rate units such as kilograms per second, kilograms per hour, grams per minute, pounds per hour, and tons per day.
The CalculatorKits tool currently supports more than 30 mass flow units and uses linear conversion factors to produce results instantly.
Try the Flow Mass Converter
What Is Mass Flow Rate?
Mass flow rate describes how much mass passes through a system during a specific period.
It is commonly expressed as:
kg/s
kg/h
g/min
lb/h
t/day
Unlike volumetric flow, mass flow does not directly describe how much physical space the fluid occupies.
This distinction becomes particularly important when fluid density changes.
For example, two fluids can occupy the same volume while having very different masses.
What Is a Flow Mass Converter?
A mass flow rate converter converts a mass flow measurement from one unit to another.
The CalculatorKits tool supports commonly used units including kg/s, kg/h, g/min, lb/h, and tons per day.
It is useful when information from different sources uses different time or mass units.
How to Use the Flow Mass Converter
1. Enter the Mass Flow Value
Enter your numerical value.
2. Choose the From Unit
Select the unit of your original measurement.
3. Choose the To Unit
Select the unit required for your calculation.
4. Convert
The calculator provides the result instantly.
5. Review the Conversion
CalculatorKits also displays the conversion relationship used in the calculation.
Example: kg/s to kg/h
Time conversion is one of the most common mass flow calculations.
Because one hour contains 3,600 seconds:
1 kg/s = 3,600 kg/h
The CalculatorKits page uses this relationship as one of its examples.
Mass Flow vs Volumetric Flow
Mass flow and volumetric flow are related but not interchangeable.
Volumetric flow measures:
volume per time
Mass flow measures:
mass per time
Density provides the connection between them.
Conceptually:
Mass flow rate = Density × Volumetric flow rate
This means that converting between mass flow and volumetric flow may require density information.
A simple unit converter cannot infer density unless that information is supplied separately.
For volumetric measurements, use the Flow Converter.
Where Is Mass Flow Used?
Mass flow measurements are common in:
- Chemical engineering
- Process engineering
- Fuel systems
- Gas processing
- Manufacturing
- HVAC
- Industrial production
- Laboratory work
- Material balance calculations
It is especially useful where the actual quantity of material matters rather than its volume.
Why Use a Mass Flow Unit Converter?
Manual conversions become tedious when you move between grams, kilograms, pounds, tonnes, seconds, minutes, and hours.
A calculator removes much of the repetitive arithmetic.
CalculatorKits uses a standard factor based conversion method:
Result = Input × From Factor ÷ To Factor
The calculation is performed locally in the browser.
Limitations
The tool converts mass flow units.
It does not measure mass flow.
It also does not determine density, pressure, temperature, viscosity, or equipment capacity.
For engineering systems where these properties affect the final design, additional calculations are required.
Frequently Asked Questions
What is a mass flow rate?
Mass flow rate is the amount of mass passing through a system per unit of time.
What is a common mass flow unit?
kg/s and kg/h are common SI based units. Other industries also use lb/h, g/min, and tons per day.
Can I convert kg/s to kg/h?
Yes. 1 kg/s equals 3,600 kg/h.
Is mass flow the same as volume flow?
No. Mass flow measures mass per time while volume flow measures volume per time.
Can the calculator determine mass flow from volume flow?
No. That requires density information and a separate calculation.
Key Takeaways
- A Flow Mass Converter converts mass flow rate units.
- Common units include kg/s, kg/h, g/min, and lb/h.
- Mass flow differs from volumetric flow.
- Density is needed when converting between mass and volume flow.
- CalculatorKits supports more than 30 mass flow units.
- The tool performs conversion calculations locally.
Reference Links
Written and reviewed by the CalculatorKits Editorial Team
Last Updated: September 9, 2026