Fuel Cost Calculator UK

Free fuel cost calculator for UK drivers. Calculate petrol and diesel costs per mile, journey expenses, and fuel efficiency instantly.

Perfect for commuters, business mileage tracking, and trip cost planning. Works with all cars.

Why Use Our Fuel Cost Calculator?

Save Money

Track your fuel spending and identify ways to reduce costs through better route planning and fuel-efficient driving.

Track Expenses

Easily calculate and track business mileage claims, tax deductions, and personal driving expenses for budgeting.

Quick Estimates

Get instant calculations for journey costs before you travel. Plan your budget for long trips and commutes.

How to Use the Fuel Cost Calculator

1

Choose Your Calculator

Select the calculator that matches your needs: Cost per Mile (for actual trips), Journey Cost (for planned trips), or Price Analysis (to compare fuel prices).

2

Enter Your Details

Input your journey distance, fuel costs, fuel economy (MPG), and current fuel prices. All UK values are supported.

3

Get Your Results

Instantly see your fuel costs per mile, total journey expenses, and fuel efficiency estimates. Perfect for budgeting.

Frequently Asked Questions

How do I know my car's MPG?
You can find your car's fuel efficiency (MPG - Miles Per Gallon) in several ways: (1) Your car's manual or service book, (2) The manufacturer's specifications, (3) Official EPA/WLTP ratings online, (4) By calculating it from your actual driving: divide miles driven by litres of fuel used. Average UK cars get 30-45 MPG depending on driving conditions and vehicle type.
Why do my actual costs differ from the calculator?
Several factors affect actual fuel costs: (1) Driving conditions - city driving uses more fuel than motorway, (2) Weather - cold weather reduces fuel efficiency, (3) Vehicle condition - underinflated tyres increase consumption, (4) Driving style - aggressive acceleration and speeding increase fuel usage, (5) Actual fuel prices vary by location and petrol station. The calculator provides estimates; actual costs may vary.
Can I use this for business mileage claims?
Yes! This calculator is perfect for tracking business mileage and tax deductions. In the UK, you can claim a mileage allowance for business use. The calculator helps you determine actual fuel costs and track your expenses. Always keep detailed records of your journeys and fuel expenses. Check with HMRC or your accountant for the current mileage allowance rates and tax deduction rules.
What's the difference between petrol and diesel costs?
Diesel and petrol have different costs and efficiency: (1) Diesel is typically more expensive per litre, (2) Diesel cars generally achieve better MPG (5-20% more efficient), (3) Over longer distances or high mileage, diesel can be cheaper overall, (4) Petrol cars are often cheaper upfront. Use our calculator with your actual fuel price and MPG to compare costs for your specific situation and journey distance.
How accurate is the fuel price data?
You enter the fuel price manually, so accuracy depends on current prices at your location. Fuel prices vary by: (1) Location - different areas have different prices, (2) Petrol station - branded stations charge differently, (3) Time - prices fluctuate daily based on crude oil and market conditions. For accurate calculations, check current prices at your usual petrol station before using the calculator. Supermarket fuel is often cheaper than branded stations.
Can I use this calculator for electric vehicles (EVs)?
This calculator is designed for petrol and diesel vehicles. Electric vehicles have different cost structures based on electricity prices (pence per kWh) rather than fuel consumption (MPG). However, you can estimate EV costs by calculating your electricity rate as equivalent "fuel" price and using typical EV efficiency ratings (miles per kWh). We're developing an EV cost calculator - check back soon!
What counts as a business journey?
For UK tax purposes, a business journey is travel in the course of your business. This includes: (1) Meetings and client visits, (2) Site visits and inspections, (3) Conference and training attendance, (4) Delivering goods or services. Commuting from home to your main office is generally NOT classed as business mileage. Always keep detailed records including dates, distances, and purpose of journey for tax deduction claims.
How can I improve my car's fuel efficiency?
Simple tips to improve fuel efficiency: (1) Check tyre pressure regularly - underinflated tyres use more fuel, (2) Service your car regularly - a well-maintained engine is more efficient, (3) Avoid carrying unnecessary weight, (4) Remove roof racks when not needed, (5) Drive smoothly - avoid rapid acceleration and hard braking, (6) Avoid idling - turn off engine in traffic, (7) Plan efficient routes - use sat nav to avoid congestion, (8) Combine trips to reduce total distance driven.