Formula used
Average flow rate (L/min) = measured liters ÷ elapsed minutes
Worked liters per minute example
Liters per Minute Calculator example: 240 L ÷ 30 min = 8 L/min. The converted average is 2.11 U.S. GPM or 480 L/h.
Interpret gallons and flow
Use a longer representative timing interval when possible and retain the original metric measurement before comparing converted values.
System effects the formula omits
Container accuracy, short timing intervals, pulsating pumps, changing head, leakage, and flow that varies during the test affect the average.
Questions specific to this calculation
How long should I time a liters-per-minute test?
Enter liters and elapsed minutes to obtain average liters per minute, U.S. gallons per minute, and liters per hour.