All calculators

6 free tools. Every one shows its formula.

• 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.