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Leak Loss Calculator

Estimate how much water a dripping tap, running toilet, or pipe leak wastes per day and what it costs over a month and a year.

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Leak Loss Calculator

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Loss estimate

60 drips a minute is about 15 litres a day — 5,500 litres a year, costing roughly 5.20 at 0.95 per thousand litres, plus any wastewater charge.

How the Leak Loss Calculator works

  1. Identify the leak type; a running toilet wastes far more than any dripping tap.
  2. Count drips over a minute, or time how long a container takes to fill for a trickle.
  3. Multiply by your water rate, and remember wastewater is often charged on top of supply.

The method

A drip is roughly a quarter of a millilitre, so drip rate converts directly to a daily volume.

litres/day = drips per minute x 0.25 ml x 1440 / 1000

At 60 drips a minute: 60 x 0.25 x 1440 = 21,600 ml, about 15 litres after allowing for smaller drip sizes — over 5,000 litres a year from one tap.

FAQ

Which leak wastes the most?

A continuously running toilet, by a wide margin — it can waste hundreds of litres a day, dwarfing every dripping tap in the house. It is also the easiest one to miss.

How do I find a leak I cannot see?

Read the water meter, use nothing for two hours, and read it again. Any movement means water is going somewhere.

Is a dripping tap worth fixing?

Financially it is usually a small sum, but a washer costs less than the water, and the same drip on a hot tap wastes heating energy too.

How we compare

Feature Online Tool Store A search-engine answer box A reference table
Cost as well as volume Manual Sometimes
Covers toilets and pipes
No account
Detects the leak itself

Leak Loss Calculator puts the numbers on it — and points at the running toilet, which wastes more than every dripping tap put together.

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