Note: costs mentioned below are given in US dollars as a general point of reference — actual prices vary by country, currency, and local market.
The EV Charging Tracker records each charging session — location, kWh added, cost, and resulting range — so you can see your real cost per mile/km instead of guessing. A typical home charge adds 20-40 kWh overnight for $3-8 at average US residential rates (about $0.16/kWh), while a DC fast-charging session can cost 2-3x more per kWh. Logging 10-15 sessions is usually enough to spot your actual average cost.
At a glance
| Metric | Typical range |
|---|---|
| Home Level 2 charge cost | $0.12-$0.22 per kWh |
| Public DC fast charging cost | $0.30-$0.55 per kWh |
| Average home session | 20-40 kWh added overnight |
| Cost per 100 miles (home) | $3-$6 |
| Cost per 100 miles (fast charger) | $9-$16 |
Why track charging sessions at all
Gas cars make cost-per-mile obvious because you pay at the pump every time. EVs blur that because most charging happens at home, billed inside a monthly electric bill you don't itemize. The tracker exists to separate that cost out — logging kWh added and price paid each session so you can calculate a genuine cost-per-mile figure rather than relying on marketing estimates.
What to log each session
- Date, location type (home, workplace, public Level 2, DC fast charger)
- kWh added (from the charger display or your car's app)
- Cost paid, or your utility's per-kWh rate if charging at home
- Odometer or range reading before and after
The formula behind the numbers
Cost per mile = (kWh added x price per kWh) / miles of range gained. If you add 30 kWh at $0.15/kWh and gain 110 miles of range, that's $4.50 / 110 = about 4 cents per mile — roughly a third of what a comparable gas car costs per mile at current fuel prices.
Worked example
| Session | kWh added | Rate | Cost | Range gained | Cost/mile |
|---|---|---|---|---|---|
| Home overnight | 32 kWh | $0.16/kWh | $5.12 | 115 mi | $0.045 |
| Workplace L2 | 18 kWh | Free (employer) | $0.00 | 65 mi | $0.00 |
| Highway DC fast | 40 kWh | $0.42/kWh | $16.80 | 140 mi | $0.12 |
Reading the trend, not just one session
A single fast-charging stop on a road trip will spike your average — that's expected and shouldn't be treated as your everyday cost. Track at least two to three weeks of normal driving to get a blended figure that reflects your actual home-to-public charging mix.
Public charger pricing is rarely a flat per-kWh rate. Many networks charge per-minute plus session fees, or tier pricing by charging speed, which can make identical kWh amounts cost very different totals — always check the receipt breakdown, not just the total.
What the tracker won't tell you
- It doesn't account for battery degradation over years of use — that requires separate range-testing over time.
- It won't include home charger hardware or installation cost unless you add it manually as a one-time expense.
- Time-of-use electricity rates mean the 'cost' of a session can vary by hour even at the same home charger.
Frequently asked questions
How much does it cost to charge an EV at home overnight?
Is DC fast charging always more expensive than home charging?
Do I need a smart charger to track sessions?
How many sessions should I log before trusting my average cost per mile?
Sources & further reading
- U.S. Energy Information Administration — Electricity retail price data
- U.S. Department of Energy — Alternative Fuels Data Center, EV charging costs
Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.
