Utilities & Bills
Water Bill Estimator
Estimate monthly water cost from household usage.
Average household uses 80-100 gallons per person per day. This calculator estimates your bill based on people, usage habits, and rate.
Monthly Bill
$48.60
- gallons
- 8,100 gal/month
- yearly
- $583.20/year
- per Capita
- 90 gal/person/day
Formula and method
Cost = (People × Gallons × 30 / 1000) × Rate
Standard EPA average usage; adjust for low-flow fixtures.
Worked examples
Family of 3
- People in Household:
- 3
- Gallons/Person/Day:
- 90
- Rate per 1000 gal ($):
- 6
Monthly Bill: $48.60
Assumptions and limits
- 30-day month
This tool provides an educational estimate. Rules, rates and personal circumstances can change the answer. Review the assumptions before relying on a result. Report a correction.
Common mistakes to avoid
- Forgetting outdoor watering and pools.
Frequently asked questions
High?
Over 100 gal/person/day signals leaks or inefficient fixtures.