Skip to main content

Greater Brisbane

Hot water cost calculator

What this calculator answers

Estimate current variable hot-water energy cost and compare the accepted systems. Use the calculator directly, or review accepted household information brought across from Household Usage or Electric vs Gas.

Useful to have ready

  • Household size or an accepted whole-household hot-water demand value.
  • The current hot-water system and applicable electricity or gas usage rate.
  • For 45 kg LPG, the ongoing bottle price and any delivery or rental charges.

If whole-household demand is not known, Household Usage can help Estimate household demand first. Direct entry is always available.

Before calculating

This is a planning comparison, not a supplier or installer quote. Fixed LPG costs remain separate from variable hot-water usage costs.

Covers Brisbane, Logan, Ipswich, Redlands and Moreton Bay. No account is required and entries are not saved to a profile. Results appear only after the calculate button is selected and are planning estimates, not personal advice or a quote.

Greater Brisbane only

Calculation details

Review the planning defaults and confirm any applicable LPG details, then click Calculate to see the results.

Location and supported region

Choose the supported council area. A postcode is optional and can help confirm the region.

Brisbane, Logan, Ipswich, Redlands, Moreton Bay council areas.

Household and demand

Use the household size, or review the accepted whole-household demand brought into this page.

People in the household. This affects daily litres and heating demand.

Current hot-water system

Select the system currently supplying household hot water.

Current system

Electric

Gas

Renewable

Energy rates and fuel costs

Review the applicable tariff or rate. LPG usage and ongoing fixed costs remain separate.

Gas supply applies to the gas systems in the comparison below.

How is gas supplied to the property?

The default uses the disclosed Greater Brisbane planning rate. Not sure uses a disclosed 3.6 ¢/MJ planning rate rather than a hidden multiplier. Choose no gas supplied above to exclude gas systems. Use a bill rate when one is available.

Review and calculate

Check the answers above, then submit explicitly to create or refresh the comparison.

All inputs are explained below the results. Calculator inputs are not saved to a user profile.

Enter details to calculate
Complete the form, then select Calculate running costs to see the results.
Results will appear after the form is submitted. Each figure uses the submitted details and the stated Greater Brisbane planning assumptions.

Greater Brisbane scope

HotWaterWise covers the Greater Brisbane council areas: Brisbane, Logan, Ipswich, Redlands, and Moreton Bay. Tariff defaults and cold-water inlet temperature assumptions are calibrated to those areas. For locations outside Greater Brisbane, numbers will diverge from your actual bill.

Estimate, not recommendation

Replacement figures are disclosed planning benchmarks, not current retailer or installer quotes. Enter a written quote for decision-grade payback. We don’t select an installer or subtract incentives from the payback calculation.

See the full methodology → · About HotWaterWise →