💦 Leak Loss Calculator for Plumbing
Estimate water lost from a measured leak rate.
This free tool helps you turn project measurements into a practical planning estimate. Enter values in Vaelden’s interactive calculator, review the result, and confirm important assumptions against supplier data, measurements, codes or qualified advice before committing materials or money.
Open the Leak Loss calculator →
How to calculate leak loss
Method: Water loss = leak rate × hours per day × number of days
- Measure or estimate leak flow rate.
- Set the daily duration.
- Multiply across the period and compare with meter data.
Worked example
Using these planning inputs:
- Leak rate: 0.1 L/min
- Duration: 24 h
- Days: 30 days
Water lost: 4320.00 L
Reality check: Hidden leaks can damage structures and create mould or electrical hazards; isolate safely and arrange prompt diagnosis rather than relying on the estimate.
Before you calculate
Use consistent units and the best measured inputs available. Real materials, equipment, site conditions and tolerances can change the result. Vaelden shows planning estimates; regulated, structural, electrical, plumbing, pressure and other safety-critical work still requires appropriate local compliance and professional advice.