Dripping Faucet Water Waste Calculator
A slow drip looks harmless. This calculator shows the gallons and dollars a dripping faucet wastes per day and per year, so plumbers can make the case for a repair and homeowners can see the real cost.
Free, no sign-up. Runs in your browser; nothing you type is stored unless you choose to email yourself the results.
Email me a copy. We'll send it to your inbox with a few tips to get more from it.
Three steps, about a minute
Step 1
Count the drips for one full minute and type that into Drips per minute.
Step 2
Enter how many Leaking faucets in the house drip at about the same rate.
Step 3
Add the Water + sewer cost per 1,000 gal from a recent utility bill.
How the dripping faucet calculator works
The USGS estimates about 15,140 drips to a gallon, and the whole calculation hangs on that figure. Drips per minute × number of faucets × 1,440 minutes in a day ÷ 15,140 gives gallons per day. That × 365 is gallons per year. Cost per year divides yearly gallons by 1,000 and multiplies by your combined water and sewer rate, since many utilities bill sewer on metered water use. One faucet at 30 drips a minute and $12 per 1,000 gallons wastes about 2.9 gallons a day, around 1,041 gallons a year and about $12.50 a year. Drop size changes with the faucet design and water pressure, so treat the result as an estimate. A running toilet or a hidden slab leak can waste far more, and those need a plumber's inspection to find.
| Drips per minute | 30 |
|---|---|
| Leaking faucets | 1 |
| Water + sewer cost per 1,000 gal | $12 |
| Gallons wasted per day | 2.9 |
|---|---|
| Gallons wasted per year | 1,041 |
| Cost per year | $12.50 |
Uses the USGS estimate of about 15,140 drips per gallon. Great content to share with customers who put off repairs.
Using the numbers like a pro: tips for plumbers
Pull up the yearly gallons on your phone during the service call. A concrete number turns 'I'll get to it eventually' into an approved repair, especially when several fixtures drip.
Offer a flat-rate fixture check whenever you're on site for a drip. Checking every faucet, toilet flapper and hose bib takes little extra time and often finds more work.
Don't oversell the dollar figure on a single faucet, because it's small. Sell the repair on wasted water, mineral stains in the basin and replacing a worn cartridge before it fails.
Put a calculator like this on your own website
Water-waste numbers make good shareable content. Host this calculator on your site, link it from Google Business Profile posts and seasonal emails, and put a short callback form under the result. Someone who just saw a four-figure yearly gallon count is ready to book the fix. Our team can add one to your site that sends each request straight to dispatch.
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Dripping Faucet Water Waste Calculator questions
How much water does a dripping faucet waste?
Using the USGS figure of about 15,140 drips per gallon, a faucet dripping 30 times a minute, once every two seconds, wastes about 2.9 gallons a day and just over 1,000 gallons a year. Faster drips waste more. Drop size depends on the faucet and water pressure, so real numbers vary.
Does a dripping faucet raise my water bill?
A little. At an example rate of $12 per 1,000 gallons for water and sewer combined, one faucet dripping 30 times a minute adds about $12.50 a year. Several leaky fixtures or a faster drip add up quicker, and a running toilet usually wastes much more water than a faucet.
Why does my faucet keep dripping after I turn it off?
Most drips come from a worn washer, O-ring, valve seat or cartridge that no longer seals when the handle is closed. Mineral buildup and high water pressure speed up that wear. Replacing the worn part usually stops the drip, and a plumber can test whether the house needs a pressure regulator.
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