Daily water saved: — gal | Energy saved: —/yr
Flow Rate Comparison (GPM)
Daily Water Usage (gal/day)
Estimated Annual Savings by Household Size
| People | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Annual savings | — | — | — | — | — | — |
Scaled from your inputs, assuming usage rises roughly in proportion to occupants.
How Much Water Does a Faucet Use?
A standard kitchen or bathroom faucet flows at about 2.2 gallons per minute (GPM), the federal maximum for fixtures made before recent efficiency standards. Newer faucets and aerators run 1.5 GPM, 1.0 GPM, or as low as 0.5 GPM for bathroom lavatory use. Multiply the flow rate by the minutes of daily use and the number of faucets to see how quickly it adds up: a single 2.2 GPM faucet running five minutes a day uses roughly 4,000 gallons a year. Cut that to 1.0 GPM and you save more than half.
Low-Flow Faucet Savings
Low-flow faucets and aerators reduce water volume by mixing air into the stream, so the flow still feels strong while using far less water. The savings are twofold: you buy less water and sewer service, and you heat less water, which cuts energy use. Because a large share of faucet water is hot, the energy savings on an electric or gas water heater often rival the water savings themselves. The calculator above separates the two so you can see both.
Faucet Aerator Payback
A faucet aerator costs only a few dollars and screws onto the existing spout in seconds, so the payback period is usually measured in weeks, not years. Replacing the whole faucet costs more but still typically pays back within a year or two through combined water, sewer, and energy savings. Enter your aerator or faucet cost above to see the exact payback based on your local rates.
Frequently Asked Questions
Will a low-flow faucet feel weak? Aerated models maintain pressure-like feel while cutting volume; most users do not notice a difference at the sink.
How much of faucet water is hot? It varies, but 30 to 50 percent is typical for mixed kitchen and bathroom use. Adjust the hot water percentage above for your situation.
Do aerators work on every faucet? Most faucets have standard male or female threads. Bring the old aerator to the store to match the thread size and shape.
What GPM should I choose? 1.5 GPM is common for kitchens where you fill pots; 1.0 or 0.5 GPM works well for bathroom hand-washing.