Calculate your monthly water usage in gallons and liters. Free online water consumption calculator for showers, laundry, and dishwasher usage.
The water usage calculator estimates your monthly household water consumption based on shower frequency, laundry loads, and dishwasher usage. Understanding your water footprint helps conserve water, reduce utility bills, and make environmentally conscious decisions about daily habits.
Shower: Showers/Week × Minutes × 2.1 gal/min
Laundry: Loads/Week × 30 gal/load
Dishwasher: Runs/Week × 6 gal/run
Monthly = Weekly Total × 4.33Standard flow rates are used: 2.1 gallons per minute for showers (average showerhead), 30 gallons per laundry load (standard washer; HE washers use ~15 gallons), and 6 gallons per dishwasher run (modern Energy Star models). Monthly estimate uses 4.33 weeks/month average.
| Input | Output |
|---|---|
| 7 showers/week, 10 min each, 3 laundry loads, 5 dishwasher runs | Monthly: ~1,356 gallons (5,131 liters) |
| 14 showers/week, 5 min each, 4 laundry loads, 7 dishwasher runs | Monthly: ~1,024 gallons (3,876 liters) |
| 5 showers/week, 15 min each, 2 laundry loads, 3 dishwasher runs | Monthly: ~1,003 gallons (3,796 liters) |