How to Use the Flow Rate Conversion Tool
- Enter a flow rate into the input box (e.g.
100). - Select the unit of the value you entered (e.g.
L/min,m³/h, orGPM (US)). - Click the “Convert” button.
- The tool will instantly display the equivalent flow rates in:
- Cubic meters per hour (m³/h)
- Litres per minute (L/min)
- Litres per second (L/s)
- Litres per hour (L/h)
- Cubic meters per second (m³/s)
- Gallons per minute (GPM – US)
This tool is perfect for engineers, technicians, or anyone needing quick and accurate unit conversions for pump flow rates.
Flow Rate Conversion Tool
What is Flow Rate?
Flow rate is the volume of fluid moving through a system per unit of time. It’s typically measured in:
- Litres per second (L/s)
- Cubic metres per hour (m³/h)
- Gallons per minute (GPM)
- Barrels per day (BPD)
- Other regional or industry-specific units
Engineers and technicians often need to switch between these units, especially when comparing international standards, datasheets, or equipment specifications.
Why Use a Flow Rate Converter?
Converting flow rates manually can be time-consuming and error-prone. A small mistake in conversion can lead to:
- Oversized or undersized pump selections
- Incorrect pipe sizing
- Inefficiencies in system design
- Costly operational issues
This tool saves time, reduces human error, and ensures accuracy in design and troubleshooting.
Common Applications
- Pump Selection: Comparing datasheets from manufacturers that use different flow units.
- System Design: Ensuring correct pipe diameter and velocity checks.
- Process Engineering: Converting between metric and imperial units in multi-national projects.
- Maintenance & Troubleshooting: Interpreting site readings against system documentation.
Flow Rate Conversion Reference Table
| From | To | Multiply by |
|---|---|---|
| Litres per second (L/s) | Cubic metres per hour (m³/h) | × 3.6 |
| L/s | Litres per minute (L/min) | × 60 |
| L/s | Cubic metres per second (m³/s) | × 0.001 |
| L/s | Gallons per minute (GPM, US) | × 15.85 |
| L/s | Gallons per minute (GPM, UK) | × 13.20 |
| L/s | Barrels per day (BPD) | × 543.44 |
| Litres per minute (L/min) | L/s | × 0.0167 |
| L/min | m³/h | × 0.06 |
| L/min | GPM (US) | × 0.264 |
| L/min | GPM (UK) | × 0.22 |
| Cubic metres per hour (m³/h) | L/s | × 0.278 |
| m³/h | L/min | × 16.67 |
| m³/h | GPM (US) | × 4.40 |
| m³/h | GPM (UK) | × 3.67 |
| m³/h | BPD | × 150.95 |
| Cubic metres per second (m³/s) | L/s | × 1000 |
| m³/s | m³/h | × 3600 |
| m³/s | GPM (US) | × 15,850 |
| Gallons per minute (GPM, US) | L/s | × 0.0631 |
| GPM (US) | L/min | × 3.785 |
| GPM (US) | m³/h | × 0.227 |
| GPM (US) | BPD | × 34.29 |
| Gallons per minute (GPM, UK) | L/s | × 0.0758 |
| GPM (UK) | L/min | × 4.546 |
| GPM (UK) | m³/h | × 0.273 |
| GPM (UK) | BPD | × 41.45 |
| Barrels per day (BPD) | L/s | × 0.00184 |
| BPD | m³/h | × 0.00663 |
| BPD | GPM (US) | × 0.0292 |
| BPD | GPM (UK) | × 0.0241 |
Tips for Engineers
- Always confirm whether your project uses US gallons or Imperial gallons—they’re different.
- Check whether flow rates are given at standard conditions (temperature, pressure) or actual measured site conditions.
- When converting very large flow rates (e.g., in mining or municipal water supply), double-check units — a misplaced zero can equal millions of litres difference.
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