Water Bill Estimator
Estimate your monthly water bill based on household size and usage habits.
See how your water use compares to averages.
Estimated Monthly Water Bill
Water bill estimation is based on average per-person usage and local water rates.
Monthly Usage (gallons) = People × Daily Gallons per Person × 30
Monthly Cost = (Monthly Usage / 1,000) × Rate per 1,000 gallons
Average daily water usage per person:
- Conservative: 40 gallons (150 liters)
- Average: 80 gallons (300 liters)
- Heavy: 120 gallons (450 liters)
Average US water rates (2025):
- Low: $3–5 per 1,000 gallons
- Average: $6–8 per 1,000 gallons
- High (urban/coastal): $10–15 per 1,000 gallons
Where your water goes:
- Toilet flushing: 24%
- Showers: 20%
- Faucets: 19%
- Washing machine: 17%
- Leaks: 12%
- Other: 8%