How do I estimate a water bill?
Multiply gallons used by the usage rate, then add base fees, sewer fees, stormwater fees, taxes, and other local charges.
Water calculator
Estimate water, sewer, and service charges in one place.
Add usage, base charges, sewer charges, and stormwater fees to see the all-in cost per month and per 1,000 gallons.
Water bill
$114
Water use$46.00
Sewer$41.00
Service$27.00
All-in rate
$15.83 per 1k gal
Best next check
Leak and irrigation
Water bill inputs
Works with gallons and a rate per 1,000 gallons.
Estimated bill
$96.50
Usage charge plus fixed water-related fees.
Usage charge
$37.50
Your gallons multiplied by the usage rate.
Daily pace
$3.22
Monthly bill spread across a 30-day period.
Effective water cost
$16.08
This is the all-in cost per 1,000 gallons after base, sewer, and stormwater fees. It is often higher than the water usage rate.
Drill into water bill line items
Tiered water bill calculator
Use tier breakpoints and higher-use rates when your water bill is not flat-rate.
Open pageAverage water bill
Compare the estimated total with normal water bill and usage ranges.
Open pageWater meter reading calculator
Convert previous and current meter readings into gallons, CCF, and daily usage.
Open pageWater bill terms explained
Look up usage, base, sewer, stormwater, meter, CCF, and adjustment terms before estimating.
Open pageCCF water bill calculators
Start from CCF usage on the bill, convert to gallons, then estimate water and sewer.
Open pageHousehold water calculators
Estimate water bills by household size before replacing gallons with the bill value.
Open pageSewer bill calculator
Estimate sewer CCF, fixed sewer charges, winter average caps, and all-in sewer cost.
Open pagePool fill water cost
Estimate a large one-time fill or top-off when pool gallons drive the bill.
Open pageUseful checks
Tools that can make the estimate more accurate
Water leak detector
Helps catch hidden leaks under sinks, near water heaters, or around laundry areas.
Toilet leak detection tablets
A low-cost way to check whether a toilet flapper is wasting water.
Low-flow shower head
Can reduce water use for households where showers drive the monthly bill.
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FAQ
Short answers for search visitors and bill-checking moments.
Why is my water bill high even when usage is low?
Fixed service charges, sewer charges, stormwater fees, and minimum bills can keep the total high even when water usage is modest.
What usually causes a sudden water bill increase?
Common causes include toilet leaks, irrigation, longer showers, billing period changes, rate increases, and estimated meter readings.