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EV charging cost and time calculator

This EV charging calculator computes the cost to charge your electric vehicle's battery, the energy needed in kWh, and the estimated charging time — for home charging, AC Type 2 stations and DC fast chargers. Enter battery capacity, starting and target charge levels, and your electricity price. Compare charging modes and plan your daily EV running costs with ease.

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How we calculate EV charging

Energy (kWh) = battery capacity × (target level% − start level%) ÷ 100. Cost = energy × price (PLN/kWh). Time (h) = energy ÷ charger power (home 3.7 kW / Type 2 11 kW / DC fast 50 kW).

Example calculation

60 kWh battery, charging from 20% to 100% (80 pp = 48 kWh). Electricity price PLN 0.85/kWh: cost = 48 × 0.85 = PLN 40.80. Home charging (3.7 kW): 48 ÷ 3.7 ≈ 13 h. AC Type 2 11 kW: ≈ 4.4 h. DC fast 50 kW: ≈ 58 min.

Frequently asked questions

How much does it cost to charge an electric car in Poland?

The cost depends on battery capacity, state of charge and energy price. For a 60 kWh battery charged from 20% to 100% (48 kWh) at PLN 0.85/kWh the cost is about PLN 40.80. At public DC fast chargers (PLN 1.50–2.50/kWh) the same charge costs PLN 72–120.

How do I calculate the energy needed to charge an EV?

Energy (kWh) = battery capacity (kWh) × (target% − start%) ÷ 100. Example: 75 kWh battery from 10% to 80% = 75 × 70 ÷ 100 = 52.5 kWh. Charging efficiency of 85–95% means actual grid draw is a few percent higher.

How long does it take to charge an electric car?

Charging time depends on charger power: home socket 3.7 kW (48 kWh ≈ 13 h), wallbox 11 kW (≈ 4.4 h), AC Type 2 11–22 kW (2–4 h), DC 50 kW (≈ 1 h), ultra-fast DC 150–350 kW (15–30 min to 80%).

Manufacturers recommend daily charging to 80–90% and to 100% only before long trips. Regular full charges accelerate lithium-ion battery degradation. EV batteries typically lose 2–3% capacity per year under normal use.

Home socket 230 V (≈ 2.3 kW), home wallbox (3.7–22 kW), public AC Type 2 stations (11–22 kW), DC fast chargers (50–150 kW) from Orlen Charge, GreenWay, Ionity and others. Poland has over 6,000 public charge points, densest along motorways A1, A2 and A4.

At 18–22 kWh/100 km and PLN 0.85/kWh the cost is PLN 15–19/100 km. A petrol car at 7 l/100 km and PLN 6.50/l costs about PLN 45.50/100 km — 2.5–3× more expensive on energy.

Yes, if you use a two-zone tariff (G12) or multi-zone tariff (G12w). Night-time energy (usually 22:00–06:00 and weekends) can be 30–50% cheaper. At G12 the night rate is about PLN 0.50–0.65/kWh vs PLN 0.85–1.00/kWh during the day.

Even at PLN 1.20/kWh, driving 100 km in an EV (20 kWh consumption) costs PLN 24 — still less than a petrol car. Home solar PV (8–10 kWp) can practically eliminate charging costs for average users.

Regenerative braking recovers kinetic energy during deceleration and converts it back to electricity. EVs can recover 15–25% of energy in city driving. One-pedal driving maximises this in urban conditions.

Largest battery EVs available in Poland include Mercedes EQS (107.8 kWh, up to 783 km WLTP), Audi Q8 e-tron (114 kWh, 582 km), BMW iX (105.2 kWh, 630 km), Kia EV9 (99.8 kWh, 563 km) and Tesla Model S (100 kWh, 634 km).

Results are indicative. Actual charging time depends on the vehicle's and charger's power limits. Not technical advice.

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