EV Charging Cost Calculator

Level 1 uses a standard 120V household outlet and delivers about 1.4 kW, which adds 3 to 5 miles of range per hour. It takes 24 to 50 hours to charge from 20 to 80 percent on a typical sedan, so it only works for short daily commutes or as a backup. Level 2 runs on a 240V circuit (the same kind your dryer uses) and pushes 6 to 11 kW, adding 20 to 35 miles per hour. A full home L2 session typically runs 4 to 8 hours, which is why most owners install one in the garage. DC fast charging bypasses the on-board charger entirely and feeds DC directly to the pack at 50 to 350 kW, finishing a 20 to 80 percent session in 18 to 45 minutes. It is the only practical option for road trips.

Residential rates in the US average about $0.16 per kWh in 2026, with most utilities offering time-of-use plans that drop the overnight rate to $0.10 to $0.13 per kWh. Public DC fast networks (Electrify America, EVgo, Tesla Superchargers) typically charge $0.40 to $0.60 per kWh because they pay commercial demand charges, finance the hardware, and price in the convenience premium. Filling 50 kWh costs about $5 to $8 at home versus $20 to $30 at a fast charger. The math flips on long road trips, where DC fast is the only realistic option, but for daily driving, home charging is the single biggest reason an EV costs less to run than a gas car.

Lithium-ion cells accept high current easily when their voltage is low, but as the pack approaches full, the cell voltage climbs and the battery management system tapers the current to protect the cathode and prevent lithium plating. A 250 kW Tesla Supercharger session might hit 200 to 250 kW from 10 to 50 percent, drop to 100 kW around 70 percent, and crawl in at 30 to 50 kW from 90 to 100 percent. That is why every road-trip guide says to charge to 80 percent and move on. This calculator uses the nameplate kW for planning, so add 20 to 40 percent if you are charging past 80 in real life.

The US residential average is about $0.16 per kWh based on 2024 EIA data, but state rates spread wide. Washington, Idaho, and Louisiana sit near $0.11 to $0.12. California averages around $0.30, New York around $0.23, and Hawaii tops $0.40. Many utilities also offer EV-specific or time-of-use plans that drop the overnight rate to $0.08 to $0.13, which is the rate you actually want to plug in for your kWh figure. Check your latest bill for the all-in rate (supply plus delivery plus taxes), since that is what your charger really costs to run.

A typical sedan EV driven 1,000 miles a month at 3.5 mi/kWh uses about 285 kWh. At the US average of $0.16 per kWh, that is roughly $46 per month, or $30 to $40 on a discounted overnight rate. A truck or large SUV at 2.0 to 2.5 mi/kWh uses closer to 450 kWh and adds $60 to $75 per month. The same 1,000 miles in a 30 MPG gas car at $3.50 per gallon costs $117, so most households save $50 to $80 a month on fuel even after the higher power bill.