Water Bill Calculator
Estimate monthly and annual water and sewer costs based on daily usage and local utility rates.
Results
Visualization
How It Works
Water and sewer are billed per 1,000 gallons (or CCF — hundred cubic feet). Sewer charges are often higher than water because wastewater treatment is more expensive. The average US household uses about 300 gallons per day.
The Formula
Monthly Cost = (Daily Gallons x 30.44 / 1000) x (Water Rate + Sewer Rate)
Annual = Monthly x 12
Annual = Monthly x 12
Variables
- CCF — Hundred Cubic Feet — 1 CCF = 748 gallons
- 30.44 — Average days per month (365/12)
Worked Example
300 gal/day at $5 water + $6 sewer: Monthly = 9,132 gal. Water = $45.66. Sewer = $54.79. Total = $100.45/month, $1,205/year.
Practical Tips
- Low-flow fixtures save 20-30% on water bills
- Fix leaky toilets — a running toilet wastes 200+ gallons per day
- Outdoor irrigation is often exempt from sewer charges — ask your utility
- Check if your utility has tiered rates — higher usage = higher rate per gallon