“How much money do I need for 100 kilometres?” The answer becomes more useful when you can enter your own data. In the calculator below, compare electric, petrol and diesel by changing consumption and price for each option. Let us first look at what the numbers mean and how to read them correctly.
For an EV, the basic calculation is energy consumption in kWh per 100 km × €/kWh. For petrol and diesel, it is litres per 100 km × €/litre. In each case, multiply the quantity of energy or fuel by its corresponding price. Source for electricity billing: U.S. Department of Energy, Appendix C.
For the electric vehicle field, you need the kWh measured at your billing point. The car’s consumption display, an app’s estimate and energy recorded by the charging meter are not automatically the same measurement. If you do not know what a reading includes, clarify that before using it.
The calculator has six editable fields: energy consumption in kWh per 100 km and price per kWh for the EV, litres and price per litre for petrol, and litres and price per litre for diesel. Enter your own final VAT-inclusive price. For a fair comparison, use comparable vehicles, similar journeys and common conditions. The default consumption figures are hypothetical, not certified averages.
Electric mobility, made simple
Change the six values to compare your own electric, petrol and diesel scenario.
Initial illustrative example
Calculations update as you type. Use a decimal comma or point, without thousands separators.
Static illustrative example: the fields are inactive and the amounts apply only to the initial values.
JavaScript is disabled. The interactive comparison is unavailable; the static initial example remains below.
The consumption figures of 20 kWh, 7 L and 5.5 L per 100 km are illustrative assumptions, not measured vehicle averages. Electricity at €0.25/kWh is hypothetical: enter your final local rate including taxes.
Electric costs €9.70 less per 100 km compared with petrol.
Electric costs €6.73 less per 100 km compared with diesel.
Greek national weighted average retail prices, including VAT: 95-octane petrol €2.100/L · road diesel €2.132/L. Data: 05 November 2026; bulletin: 06 November 2026; checked: 07 November 2026. Historical reference, not live prices.
Official PDF bulletinBulletin index
The source applies to the initial prices. Your edits form a personal scenario and do not change the historical reference.
Energy/fuel cost only: consumption × unit price. Excludes session, time and parking fees, fixed charging fees, vehicle purchase, servicing and insurance.
For electric, enter energy consumption in kWh per 100 km as recorded by the meter or billing, not automatically the dashboard reading. If it includes charging losses, do not add them again.
The initial fuel prices come from the official Greek Fuel Price Observatory bulletin for 05/11/2026, issued on 06/11: national weighted average retail prices including VAT of €2.100/L for 95-octane unleaded petrol and €2.132/L for road diesel. It was the latest bulletin available in the official index when checked on 07/11/2026. Replace them with the price you actually pay.
| Option | Hypothetical consumption | VAT-inclusive price | Cost/100 km |
|---|---|---|---|
| Electric | Energy consumption: 20 kWh | €0.25/kWh — hypothetical | €5.00 |
| 95-octane petrol | 7.0 L | €2.100/L — official average, 05/11/2026 | €14.70 |
| Road diesel | 5.5 L | €2.132/L — official average, 05/11/2026 | €11.73 |
The fixed table shows the starting example and remains readable without the interactive function. Consumption and electricity price are hypothetical; fuel prices are the official averages stated above. Amounts are rounded to cents. For diesel, 5.5 × 2.132 = €11.726, or €11.73.
Energy is lost during charging, for example through conversion and as heat. Energy recorded at the supply does not necessarily equal the increase inside the battery. The EPA includes charging losses in its own consumption measurements. Source: U.S. EPA.
When using the kWh actually billed, do not add another arbitrary percentage “for losses”. If you start with a vehicle display reading, first examine what it includes. Losses differ by vehicle, system and conditions. Source: U.S. DOE/EPA. The tool does not automatically add a second loss factor.
The result covers energy or fuel cost per 100 km only. It does not include vehicle purchase, maintenance, insurance or charger installation. Nor does it add fixed fees, session-start, time, parking or occupancy charges. Check which apply to your session and add them separately to your budget. Source for different pricing structures: NIST.
At home, separate charges that increase with additional kWh from a fixed fee you pay anyway. If you allocate a fixed fee for an overall budget, keep it as a separate line so that you do not count it twice.
Collect charging records, fuel receipts and the corresponding distance covered. For the EV, compare periods with similar starting and ending battery levels. For petrol and diesel, also use similar starting and ending fuel levels in the tank. This avoids attributing energy still stored to the journey. If energy prices differ between sessions, calculate each session separately before adding the amounts.
Try the calculator with your own prices and keep the assumptions alongside the result. For questions, send ECOCAR “COST” and the model you are considering.
Χρησιμοποιούμε cookies για να σας προσφέρουμε μια εξατομικευμένη εμπειρία. Επιπλέον, αναλύουμε την επισκεψιμότητα και ενισχύουμε την ασφάλεια της πλατφόρμας, ώστε να απολαμβάνετε τις υπηρεσίες μας σε ένα περιβάλλον που συνεχώς εξελίσσεται.
Όταν επισκέπτεστε οποιονδήποτε ιστότοπο, ενδέχεται να αποθηκεύσει ή να ανακτήσει πληροφορίες στο πρόγραμμα περιήγησής σας, κυρίως με τη μορφή cookies. Ελέγξτε τις προσωπικές σας ρυθμίσεις εδώ.
