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Dripping leak water loss calculator

Catch a drip in a cup for a few minutes, then see how much water a leak wastes per day, per month and per year.

This is an extrapolation at a constant rate, and a real leak speeds up or slows down. To confirm a hidden leak, read the water meter with every tap and appliance off, then read it again after a while: if it has moved, water is escaping.

Enter your values, then calculate.

Method and limitations

Loss per day in litres = volume collected in millilitres ÷ time in minutes × 1,440 ÷ 1,000. The month is 30 days and the year 365 days. US fluid ounces are converted with 1 US fl oz = 29.5735295625 ml, and litres to US gallons with 1 US gal = 3.785411784 L. Each loss is shown to one decimal place in litres and in US gallons.

Sources

No external reference is documented for this calculation; its method and limitations are described above.