Water Bill Calculator
Estimate your water bill from usage in kilolitres, your utility's usage charge and fixed service charges.
Your results
Calculation breakdown
- Usage charge
- Usage charge = kL used × rate per kL
- Total
- Total = usage charge + fixed charges
Worked example
Using 60 kL at $2.90 per kL, plus $250 in fixed and sewerage charges, gives an estimated quarterly bill of about $424.
Assumptions
- Water pricing structures and fixed charges vary widely between utilities and states.
- Enter charges for whichever period your bill covers.
- Excludes any usage-based sewerage charges unless added to the fixed charge input.
How this calculator works
Enter your water usage in kilolitres, the usage charge per kilolitre and any fixed service or sewerage charges to estimate your total water bill. Water pricing structures vary between states and utilities, so all rates are editable.
Frequently asked questions
Where do I find my usage rate?
It is printed on your water bill or available from your local water utility's published tariff schedule.
Are sewerage charges included?
Yes, add them as a separate fixed charge input since many utilities bill water usage and sewerage access separately.
Is this bill quarterly or annual?
Enter charges for whichever billing period you have, and the calculator will also show an annualised estimate.
Actual prices, usage, efficiency and savings vary by provider, equipment, location and behaviour.