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Liters per Minute Calculator.
Calculate flow rate from liters and elapsed minutes.
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liters: 100
minutes: 5
Liters/minute: 20
Gallons/minute: 5,2834
Planning arithmetic only; enter explicit dimensions, areas, and elapsed times. No code, product, density, or design recommendation is inferred.
Use Cases
Pump flow rate testing
Measure how many liters a pump delivers in a set time to verify its output against specifications.
Example: If a pump delivers 30 liters in 2 minutes, the flow rate is 15 L/min.
Filling or emptying tanks
Determine how quickly a tank fills or empties by timing the volume change.
Example: A tank gains 50 liters in 5 minutes, so the fill rate is 10 L/min.
Frequently Asked Questions
- How do I calculate liters per minute?
- Enter the total liters and the elapsed time in minutes. The calculator divides liters by minutes to give you the flow rate in L/min.
- What units does this calculator use?
- It uses liters (L) for volume and minutes (min) for time. The result is in liters per minute (L/min).
- Can I use this for water flow in pipes?
- Yes, you can use it to estimate flow rate from a known volume and time, which is useful for checking pump output or pipe flow.
Tips & Common Mistakes
Tips
- Ensure the time is in minutes; if you have seconds, convert to minutes first (divide by 60).
- Use consistent units: liters for volume, minutes for time.
- For accurate results, measure the volume precisely and time the duration carefully.
- This calculator gives an average flow rate over the elapsed time.
Common Mistakes to Avoid
- Forgetting to convert seconds to minutes before entering time.
- Using gallons or other volume units instead of liters.
- Entering time in hours instead of minutes, leading to incorrect flow rates.
Last updated: August 13, 2026