Liters Per Minute Calculator

litres
minutes
Construction

Calculate flow rate in litres per minute from volume and time.

Formula

LPM = volume (L) ÷ time (min); GPM = LPM ÷ 3.78541
  • 1 US gallon = 3.78541 litres.
  • LPS = LPM ÷ 60.

20 litres in 4 minutes

Inputs
  • Volume: 20 litres
  • Time: 4 minutes

LPM = 20 / 4 = 5.000 LPM = 1.3209 GPM.

Frequently asked questions

What is a normal shower flow rate?
A standard showerhead flows about 8–10 LPM (2.1–2.6 GPM). Water-saving models are ≤7.6 LPM (2 GPM).