Water Leak Loss Calculator
Calculate litres, kilolitres and Australian water-usage cost lost from a measured continuous leak over a selected period.
Your results
Calculation breakdown
- Leak loss
- litres per minute × 60 × hours per day × days
Worked example
A 0.2 L/min leak running continuously for 30 days loses 8.64 kL, or 288 L daily, costing $25.92 at $3 per kL.
Assumptions
- Leak flow remains constant during entered hours.
- Cost uses one water usage rate only.
Sources
Rates effective 23 August 2026.
How this calculator works
Convert a measured continuous leak flow into daily and period water loss, kilolitres and usage-charge cost. The period total shows how a small continuous flow accumulates and prices usage separately from repair or service charges. The calculation exposes its units and intermediate assumptions so Australian users can reconcile the estimate with bills, meters, labels, design records or site measurements.
Frequently asked questions
What should I measure for the water leak loss result?
Measure the leak where safe, confirm duration from meter or observations and arrange repair by an appropriately licensed practitioner. Keep the measurement period and unit basis consistent across every input.
What can make this water leak loss estimate differ?
Intermittent flow, stepped tariffs, sewer charges, meter resolution, hidden leaks and repair costs can change the outcome. Recalculate with measured operating data before making a purchase, design or reporting decision.
Does this water leak loss calculator confirm compliance?
No. It provides a transparent planning calculation only. For this topic, measure the leak where safe, confirm duration from meter or observations and arrange repair by an appropriately licensed practitioner. Obtain qualified advice where electrical, plumbing, building, safety or reporting obligations apply.
Actual prices, usage, efficiency and savings vary by provider, equipment, location and behaviour.