Water Usage & Bill Calculator
Estimate household water use from showers, toilet flushes, laundry and dishwashing — and the monthly cost at your water and sewer rates.
How to use
- 1Enter your household's daily habits.
- 2Enter your water rate (per 1,000 gallons) to see the monthly bill.
How it's calculated
Typical use: shower 2.1 gal/min, toilet 1.6 gal/flush (1.28 for WaterSense), clothes washer 20 gal/load (13 for high-efficiency), dishwasher 4 gal/load. Monthly gallons = daily × 30.4.
Frequently asked questions
How much water does an average person use?
About 80–100 gallons a day at home in the US (USGS), much of it through toilets, showers and laundry.
What saves the most water?
Fixing leaks, WaterSense toilets and showerheads, and running only full loads in washers and dishwashers.
Why is my bill higher than calculated?
Outdoor watering, leaks and fixed service charges aren't included. A running toilet can waste 200 gallons a day.