Water Leak Cost Estimator
A small continuous leak can accumulate substantial volume over time. This calculator scales a measured flow by hours and days, converts litres to cubic metres and applies the entered unit price.
How to use this calculator
- Use a measured flow rate and your actual water tariff where possible.
- Check that units, denominator definitions and time periods are consistent before comparing scenarios.
- Run a second scenario when an assumption is uncertain.
Formula used by water leak cost estimator calculator
Water volume (m³) = litres/minute × 60 × hours/day × days / 1,000; supply cost = volume × price per m³.
- Water volume (m³) = litres/minute × 60 × hours/day × days / 1,000; supply cost = volume × price per m³.
- This excludes wastewater charges, fixed fees and stepped tariffs. If you suspect a hidden leak, check the meter and contact an appropriate professional.
- The tool performs arithmetic on the values entered and does not validate assumptions against outside records.
Worked examples
Worked example
0.5 L/min for 24 hours/day over 30 days, at €2.50/m³.
Water lost = 21,600 L = 21.6 m³; supply cost = €54 before other bill components.
Estimated leaked volume and supply cost are based on the entered flow and tariff.
Understanding the result
A small continuous leak can accumulate substantial volume over time. This calculator scales a measured flow by hours and days, converts litres to cubic metres and applies the entered unit price.
This excludes wastewater charges, fixed fees and stepped tariffs. If you suspect a hidden leak, check the meter and contact an appropriate professional.
Important notes
This excludes wastewater charges, fixed fees and stepped tariffs. If you suspect a hidden leak, check the meter and contact an appropriate professional.
Treat this output as an estimate tied to the stated inputs. For regulated, safety-critical, tax or professional decisions, verify applicable official guidance and specifications.
Frequently asked questions
Does this include sewer charges?
No, unless you include them in the entered per-cubic-metre price.
What if the flow rate changes?
Run separate scenarios or use the average flow over the period.
How should I interpret the result?
This excludes wastewater charges, fixed fees and stepped tariffs. If you suspect a hidden leak, check the meter and contact an appropriate professional.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.