21 free calculators

Discover all our calculators by category

Accurate tools for EV charging, ownership costs, and home energy — no sign-up, results as you type. Pick a tool to get started.

EV Charging EV Finance & Ownership Home Energy

EV Charging

Charging cost, time, range — the everyday EV numbers.

Cost & Savings4

EV Charging Cost Calculator

Estimate the cost to charge your EV at home or in public based on battery size, charge level, and your electricity rate.

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Monthly EV Charging Cost Calculator

Estimate your monthly cost to charge an EV at home from how much you drive — plus the monthly savings versus a gas car.

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Solar Panels for EV Charging Calculator

Find how much solar capacity and how many panels you'd need to offset your EV's annual charging energy.

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Off-Peak EV Charging Savings Calculator

See how much you save by charging your EV off-peak on a time-of-use plan versus a flat electricity rate.

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Speed & Range2

EV Charging Time Calculator

How long to charge your EV on Level 1, Level 2, or DC fast charging — from any starting battery level.

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EV Range Calculator

Estimate real-world driving range from battery size and efficiency, adjusted for temperature and speed.

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Home Install & Wiring2

Level 2 Charger Breaker & Amperage Sizing

Size the breaker and wire for a Level 2 EV charger using the NEC 125% continuous-load rule.

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Home EV Charger Installation Cost

Estimate the cost to install a Level 2 home charger, including panel, wiring, and labor by state.

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EV Finance & Ownership

Loans, total cost of ownership, insurance, tax credits.

Financing3

EV Loan & Payment Calculator

Calculate monthly payments, total interest, and payoff for financing an electric vehicle.

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EV Tax Credit Calculator

See what an EV tax credit is worth — effective price, plus the point-of-sale vs tax-time impact on your payment and interest.

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EV Lease Payment Calculator

Calculate a monthly EV lease payment from price, residual value, money factor, and term — and see the APR it works out to.

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Ownership Cost3

EV vs Gas Cost of Ownership

Compare the total cost of owning an EV versus a gas car over time — fuel, maintenance, and financing.

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EV Depreciation Calculator

Project an EV's resale value and total depreciation over the years you own it.

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True Cost to Own an EV Calculator

Add up the real monthly cost of owning an EV — payment, insurance, home charging, and maintenance.

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Home Energy

Heat pumps, electricity costs, electrification payback.

Heat Pumps2

Heat Pump Payback Calculator

Estimate how many years until a heat pump pays for itself versus your current heating system — electric, gas, oil, or propane.

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Heat Pump Sizing Calculator

Estimate the heat pump size (BTU and tons) your home needs, adjusted for square footage, climate, and insulation.

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Generators2

Generator Sizing Calculator

Size a home generator by picking the appliances you want to back up — running watts plus the largest startup surge.

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Generator Runtime & Fuel Calculator

Estimate how long a generator runs on a tank and its fuel use and cost — by load level and fuel type.

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Electricity Bills2

Electricity Cost Calculator

Calculate the running cost of any appliance from its wattage, hours of use, and your electricity rate.

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Electricity Bill Estimator

Estimate your monthly electricity bill from your major loads — and see which ones drive the cost.

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Electrical Panel1

Home Electrical Load Calculator

Estimate your home's electrical demand with the NEC load-calculation method and see if your 100A or 200A service has room.

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