Fuel calculators

Save and monitor fuel usage with our free calculators

See how economical your car is with our free fuel consumption and car tax calculators.

We have some of the most widely used fuel calculators on the internet in these pages and we are keep to keep improving them so keep the feedback coming in.

MPG calculator UK miles per Gallon – calculate MPG

Our popular MPG Calculator – just enter Mileage and Fuel used since last fill-up: and try the calculator again after using our fuel saving tips (I bet you get another 50 miles out of a tank!).

Use your trip counter and reset when you fill up ensuring that the tank is full then when empty fill up to full again noting the mileage covered.

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MPG calculator using km. Kilometers to UK MPG.

Miles per gallon calculator using kilometers covered. "MPG calculated from KM" Press ctrl + D to book mark this MPG Calculator […]

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Litres per 100km calculator.

L/100km Calculator. Simply enter Mileage and Fuel used since last fill-up to get your fuel consumption in L/100km – the new European standard measure of a cars economy:Use your trip counter and reset when you fill up ensuring that the tank is full then when empty fill up to full again noting the mileage covered.

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Calculate annual fuel cost from MPG and compare 2 cars MPG

Now you can see what your annual fuel cost is based on your annual mileage, your MPG and the cost of fuel per litre.

Calculate your annual fuel cost from MPG and compare 2 cars side by side. It is handy if you are buying a newer car and want to see how the annual fuel costs compare.
We don’t take into account the price of inflation on the fuel price so we recommend that you add a bit to the fuel cost so it averages out. For example if the fuel cost is 140pence putting 146 pence should cover you for the hikes during the rest of the year.

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Todays featured car tuning articles

Tuning boxes

Tuning boxes are often slated because there are so many rip off devices around. We look at the truth about tuning boxes and help our readers identify the piggy back ecu’s that are worth having. What does a piggy back ECU do? How do they work and are they worth buying?

Read the full guide...

How to avoid engine knock and pinging

So what exactly is engine knock and how dangerous is it? What causes engine knock and how can it be avoided?

You may notice a knocking or rattling noise from your engine or a sudden loss of power under full throttle.

Immediately back off the throttle and only use low rpm engine speeds until you can get the engine investigated.

The chances are that you are suffering from a condition known as “engine knock”.

Read the full guide...

Fuelling uprating the fuel system

More power means that more fuel is required so we need to uprate the fuel system and we look at performance mods for your fuelling to avoid running rich or lean.

It is essential to keep the mix of air to fuel exactly right. Power is lost when the engine adjusts itself to stop it running too rich or lean. Many power losses, which manifest themselves as flat spots, at certain points in the rev band can often be traced to a fuelling issue so we will look at performance fuelling upgrades and parts.

Read the full guide...

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