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Calculators

EV & energy calculators that do the real math

Accurate tools for EV charging, ownership costs, home energy and solar: NEC-correct electrical sizing, your own electricity rate, results as you type.

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0110 calculators

EV Charging

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

Cost & Savings5

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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Tesla Charging Cost Calculator

What it costs to charge a Tesla at home vs a Supercharger, by model, charge level, and your electricity rate. See the Supercharger premium and cost per mile.

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Monthly EV Charging Cost Calculator

What does it cost to charge an electric car at home? Estimate your monthly EV charging cost 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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EV Finance & Ownership

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

Ownership Cost5

EV vs Gas Cost of Ownership Calculator

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

EV depreciation, projected: see an electric car'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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EV Insurance Cost Estimator

Estimate what it costs to insure an electric car by value, age, coverage, and state. See the EV surcharge and whether full coverage is still worth it.

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EV Battery Replacement Cost Calculator

Estimate the cost to replace an EV battery pack by size and pack price, split into pack and labor, plus a warranty check against the 8-year / 100,000-mile minimum.

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0312 calculators

Home Energy

Heat pumps, electricity costs, electrification payback.

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Solar & Storage

Solar payback, panels needed, and home-battery sizing.

Not sure where to start?

These three answer the questions we get most. Every tool is free, instant and runs in your browser.

EV charging costHome electrical loadGenerator sizingRead the guides