Estimate how much a toilet leak could add to a water bill by gallons per minute, days leaking, water rate, and sewer charges.
Water bill
$114
All-in rate
$15.83 per 1k gal
Best next check
Leak and irrigation
Estimate a leak by flow rate, days leaking, water rate, and sewer charge relationship. Use your bill for a better local rate.
Water wasted
8,640 gal
Estimated gallons lost during the selected period.
Added cost
$97.20
Water charge plus an estimated sewer charge.
Water charge
$54.00
The usage portion based on your rate per 1,000 gallons.
Daily pace
$3.24
How much the leak may add each day.
A worn flapper or fill valve can waste water quietly all day.
The fastest way to confirm the estimate is to check the meter when all fixtures are off. If the meter still moves, water may be flowing somewhere in the home or yard.
Useful checks
Helps catch hidden leaks under sinks, near water heaters, or around laundry areas.
A low-cost way to check whether a toilet flapper is wasting water.
Can reduce water use for households where showers drive the monthly bill.
Links may become affiliate links when an associate tag is configured. Product checks are optional and are not required to use the calculators. Read disclosures.
Separate usage, base, sewer, stormwater, and service charges.
Open pageBrowse the leak index for toilets, faucets, showers, irrigation, and service lines.
Open pageCompare the leak estimate against normal household gallons per month.
Open pageEstimate the monthly savings after repairing the leak or reducing gallons.
Open pageStart with 1.5 gallons per minute and adjust rate, days, and sewer charges.
Open pageStart with 0.25 gallons per minute and adjust rate, days, and sewer charges.
Open pageStart with 2 gallons per minute and adjust rate, days, and sewer charges.
Open pageStart with 0.03 gallons per minute and adjust rate, days, and sewer charges.
Open pageStart with 0.1 gallons per minute and adjust rate, days, and sewer charges.
Open pageShort answers for search visitors and bill-checking moments.
This calculator starts with 0.2 gallons per minute for toilet leak, then multiplies by time, water rate, and an optional sewer charge multiplier.
Many water bills include sewer or wastewater charges tied to water use. If your bill does not apply sewer charges to leaks, set the multiplier to 0.
Put dye or a leak tablet in the tank and wait without flushing.