Fuel Cost Calculator
Work out exactly what a journey will cost in fuel. Enter the distance, your car's consumption (L/100km), and the price per litre.
How is this calculated?
Litres used = (distance × consumption) / 100. Total cost = litres × price per litre. Cost per km = total / distance.
Frequently Asked Questions
What's a typical fuel consumption for an Irish car?
Modern petrol cars: 5–8 L/100km. Modern diesels: 4–6 L/100km. Older or larger cars: 7–10+ L/100km. Check your car's handbook or recent fill-up records for the most accurate figure.
What's the average fuel price in Ireland?
Ireland has some of the highest fuel taxes in Europe. As of 2026, petrol typically runs €1.75–€2.00 per litre and diesel €1.65–€1.90. Check fuels.ie or AA Ireland for current averages.
How can I reduce my fuel cost?
Drive smoother (avoid heavy acceleration and braking), keep tyres at correct pressure, remove roof boxes when not in use, plan trips to combine errands, and consider a more efficient or electric car for long-term savings.
Is electric cheaper than petrol in Ireland?
Generally yes — at €0.30/kWh and ~5 km/kWh, an EV costs ~6c/km. A 6L/100km petrol car at €1.85/L costs ~11c/km. Savings depend on your driving pattern, electricity tariff (night-rate is significantly cheaper), and total mileage.
How do I calculate the cost of a return trip?
Either enter the round-trip distance directly, or calculate one-way and double it. The calculator multiplies linearly so doubling distance doubles fuel cost.
Last updated: May 2026 · Rates sourced from Revenue