All calculators
12 free tools. Every one shows its formula.
Hover a card to see what it answers
- Electricity bill estimator Build up your whole monthly bill, appliance by appliance.
- EV charging cost What it costs to charge at home, at public chargers, or a mix of both.
- Appliance running cost What any appliance costs per hour, month and year on your tariff.
- EV vs gas running cost Side-by-side fuel costs — including the cases where the EV loses.
- Solar panel payback How many years until a solar array pays for itself — honestly.
- Heat pump vs furnace Which actually costs less to run on your rates — including when gas wins.
- Air conditioning cost What cooling costs per hour, per month and across a summer.
- Heating fuel comparison Gas, propane, oil, electric, heat pump and wood — ranked on your prices.
- Space heater cost What a plug-in heater really adds to your winter bill.
- Water heater cost Electric vs gas vs heat pump — annual running cost compared.
- Home charger payback How fast a Level 2 charger installation pays for itself.
- 1500-watt heater cost What a 1500W heater costs per hour, day, month and season.