Estimate water lost to a running toilet
In this fictional test, the meter records 9 L in 30 minutes while intended water use is off. Movement stops after the toilet supply is isolated, so 9 ÷ 30 = 0.30 L/min is used to estimate loss from that branch.
Open CalculatorInputs and calculation
| Tool input | Value |
|---|---|
| Currency | USD |
| Volume or billing unit | m³ |
| Flow (L/min) | 0.3 |
| Days or equivalent sessions | 1 |
| Price per billing unit (USD) | 4 |
0.3 L/min × 1,440 min/day × 1 day = 432 L. Divide by 1,000 for m³, then multiply by 4 for USD 1.73.
Tool result · USD 1.73
| Tool input | Value |
|---|---|
| Currency | USD |
| Volume or billing unit | m³ |
| Flow (L/min) | 0.3 |
| Days or equivalent sessions | 3 |
| Price per billing unit (USD) | 4 |
0.3 L/min × 1,440 min/day × 3 days = 1296 L. Divide by 1,000 for m³, then multiply by 4 for USD 5.18.
Tool result · USD 5.18
What the comparison shows
The estimate adds 432 L per day. Repeating the isolation test after work can check whether the measured loss stopped.
Assumptions and limits
Meter resolution and other unnoticed use can affect the result. The isolation test does not identify a failed part.