Household electricity estimates

Know what a home energy choice costs.

Wattwise gives quick, editable estimates for common household energy decisions: charging an EV, running cooling, using appliances, or checking a solar quote.

Current estimate$45.00
editable
home

Calculator hub

Estimate the bill impact before you change the habit.

EV

EV charging cost

Estimate the monthly electricity cost of home charging from miles, efficiency, and your rate.

Monthly charging$45.00250 kWh used
Yearly charging$540.00at your electricity rate
Cost per mile5celectricity only

Assumptions

Every estimate is only as good as the inputs you control.

Use your real rate

Electricity prices vary by utility, plan, and time of use. Start with the per-kWh rate printed on your bill.

Match the actual pattern

A few extra hours per day can change the answer. Use the room, commute, or appliance schedule you actually expect.

Treat results as estimates

The calculators ignore taxes, demand charges, weather swings, financing, maintenance, and utility plan changes.

Use cases

Use it when a bill decision needs a fast first-pass answer.