Calculators
Calculate your energy
Everything runs in your browser, nothing is sent anywhere. Results are estimates; adjust prices to your own plan.
Appliance consumption
What uses the most at home and what it costs. The fridge is rarely to blame; the tumble dryer often is.
Solar payback
How many years until the roof pays for itself, with and without subsidy. No marketing, just numbers.
Gas vs. reverse-cycle
Yearly cost of gas heating and hot water against reverse-cycle air con and a heat-pump water heater.