📊 MPG Calculator – Free Online Vehicle Tool
Calculate your vehicle's actual MPG based on real driving data. 100% free, no sign-up required.
Fuel Used: 0 litres
MPG: 0
Litres per 100km: 0
How to Use the MPG Calculator
The MPG Calculator is a simple yet essential tool designed to help you work out your vehicle's actual fuel efficiency. Whether you want to track your car's performance, compare different vehicles, or simply understand your fuel costs, this tool gives you accurate results based on your real driving data.
Step 1: Enter the number of miles you've driven since your last fill-up.
Step 2: Enter the amount of fuel you put in your vehicle in litres.
Step 3: Select your fuel type.
Step 4: Click "Calculate MPG" and the tool will show your MPG and litres per 100km.
Why Use an MPG Calculator?
Understanding your vehicle's MPG is essential for:
- Tracking fuel efficiency – monitor your car's performance
- Budgeting – know exactly how much you'll spend on fuel
- Comparing vehicles – see which car is more efficient
- Identifying issues – a sudden drop in MPG can indicate a problem
Whether you're a driver, business owner, or fleet manager, this tool is essential for managing your fuel consumption.
Understanding MPG
MPG (Miles per Gallon) is a measure of fuel efficiency. The higher the MPG, the more fuel-efficient your vehicle is.
Typical MPG figures for UK vehicles:
- Small petrol car: 45-55 MPG
- Large petrol car: 30-40 MPG
- Diesel car: 50-65 MPG
- Hybrid: 60-80 MPG
- Electric: Not measured in MPG
Your actual MPG may vary based on driving conditions, traffic, and driving style.
How to Improve Your MPG
Here are some ways to improve your vehicle's fuel efficiency:
- Drive smoothly – avoid harsh acceleration and braking
- Check tyre pressure – under-inflated tyres increase fuel consumption
- Remove roof racks – extra drag reduces fuel economy
- Service your vehicle – clean air filters and oil help efficiency
- Reduce weight – remove unnecessary items from your boot
Even small changes can improve your MPG and save you money.
Typical MPG Examples
Here are some typical MPG figures for UK roads:
- City driving: 20-30 MPG (higher fuel consumption)
- Motorway driving: 40-55 MPG (lower fuel consumption)
- Combined: 35-50 MPG (real-world average)
Use the calculator to track your actual MPG and see how it compares to these averages.
Frequently Asked Questions
1. How do I calculate my MPG?
Enter the miles driven and litres of fuel used. Our calculator does the maths for you automatically.
2. What is a good MPG for a car?
For a petrol car, 40+ MPG is good. For diesel, 50+ MPG is good. Higher is always better for fuel efficiency.
3. How often should I check my MPG?
Check your MPG at each fill-up to track your vehicle's performance and identify any issues early.
4. Does driving style affect MPG?
Yes, aggressive driving (rapid acceleration and hard braking) can reduce your MPG by up to 30%.
5. What factors affect MPG?
Driving style, traffic conditions, tyre pressure, vehicle load, and weather conditions all affect MPG.
6. What is the difference between MPG and litres per 100km?
MPG is a UK measure of fuel efficiency. Litres per 100km is the European measure. This calculator gives you both.
7. Can I use this calculator for diesel?
Yes, the calculator works for both petrol and diesel vehicles.
8. Why has my MPG dropped?
A drop in MPG could indicate a problem such as low tyre pressure, a dirty air filter, or a mechanical issue that needs attention.
Related Tools
If you found this MPG calculator useful, you might also like these related vehicle tools:
- Fuel Cost Calculator – calculate fuel costs for any journey
- Fuel Savings Calculator – compare petrol, diesel, and electric costs
- Running Costs Calculator – calculate cost per mile and yearly running costs
- Mileage Calculator – track your mileage for work, tax, and personal trips