Faucet Flow Rate Calculator

Measure your faucet flow rate in GPM, compare it to EPA standards, and estimate water usage and savings.

How to Measure

Place a container under the faucet, turn it on fully, and time how many seconds it takes to fill a known volume. Enter the values below, or directly enter a known GPM.

Input Method

Volume Collected

Unit

Time to Fill (seconds)

Faucet Type

Daily Usage (minutes/day)

Water Cost ($/1000 gal)

Flow Rate Analysis

EPA WaterSense Standards

Bathroom faucets: max 1.5 GPM (WaterSense) / 2.2 GPM (federal).
Kitchen faucets: max 2.2 GPM (federal standard).
Showerheads: max 2.0 GPM (WaterSense) / 2.5 GPM (federal).