Driving & travel
EV Range and Charging Cost Calculator
Estimate range, charging loss and day/night electricity cost. This free ev range and charging cost calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate range, charging loss and day/night electricity cost.
Calculated outcomes
- Real-world EV efficiency
- 180 Wh/km
- Battery Journey KWh
- 27 kWh
- Grid Journey KWh
- 31.765 kWh
- Grid Full Charge KWh
- 75.294 kWh
- Blended electricity tariff
- €0.19/kWh
- Full Charge Cost
- €14.31
- Cost Per100 Km
- €4.02/100 km
Assumptions and estimates
- WLTP adjustment increases consumption; use 0% when entering measured real-world Wh/km. A 15% energy loss means grid energy = battery energy / 0.85, not × 1.15. Night share is the percentage of charging energy bought at night. Range uses usable battery capacity and excludes a reserve; standing, session and parking charges are separate.
- Method: Battery energy = distance × Wh/km ÷ 1,000. Grid energy divides by charging efficiency. Day/night prices use the selected energy split.
- A 15% energy loss means dividing by 0.85, not merely adding 15%. Weather, speed, reserve charge and battery health affect range. Tariff standing charges and session fees are excluded.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the ev journey & charging calculation works
Battery energy = distance × Wh/km ÷ 1,000. Grid energy divides by charging efficiency. Day/night prices use the selected energy split.
A 15% energy loss means dividing by 0.85, not merely adding 15%. Weather, speed, reserve charge and battery health affect range. Tariff standing charges and session fees are excluded.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review journey cost and range km, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Journey distance (km)
- 150
- Usable battery capacity (kWh)
- 64
- Baseline energy use (Wh/km)
- 180
- Real-world consumption uplift (%)
- 0
- Share of grid energy lost (%)
- 15
- Day electricity price (€/kWh)
- 0.35
- Night electricity price (€/kWh)
- 0.15
- Charging energy at night (%)
- 80
- Journey Cost
- €6.04
- Range Km
- 355.56 km