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Water bill

Estimate a monthly water bill from usage, volumetric rates and fixed charges.

Built and maintained by The NumberPrism Editorial TeamEditorial policy

Your details

Monthly water use (gallons)

Water rate ($ per 1,000 gal)

Fixed service fee ($)

Sewer rate ($ per 1,000 gal)

Results update as you type. The formula and assumptions are explained below the calculator.

Estimated monthly bill

$52.50

Water charge$20.00

Sewer charge$17.50

Fixed service fee$15.00

Cost per 1,000 gallons$10.50

Annual cost$630.00

Estimate assumes flat volumetric rates. Tiered pricing, stormwater fees, taxes and seasonal adjustments change the final bill.

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What does this tool do?

Water bills usually combine a fixed service charge with a rate per 1,000 gallons, plus a sewer charge that follows water use. This calculator totals those parts and shows the effective cost per 1,000 gallons.

The Formula

Bill = Usage ÷ 1,000 × (Water rate + Sewer rate) + Fixed fee

Frequently Asked Questions

Why is my bill higher than usage times the rate?

Fixed service charges, sewer fees, stormwater charges and taxes sit on top of the volumetric rate. Check the breakdown on your statement.

How can I lower a water bill?

Fix leaks, run full loads, and check irrigation schedules. A dripping toilet flapper alone can waste thousands of gallons a month.

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