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

How to add a turbo to a non turbo car.

The basic reason for forced induction (turbo or supercharger) is not to increase compression or the maximum pressure in an engine cylinder, it is to increase volumetric efficiency (the efficiency of the engine at drawing in air) although forced induction is the most effective method of upping compression.

In computer games we just tick a box, and within seconds our car is fully turbocharged and running much faster. In the real world things are very different.

Read the full guide...

Benefits and drawbacks of engine water injection systems

You’ve finished tuning up your engine but you find that at full throttle the engine splutters or stalls. When you get the car on a diagnostic you find that the knock sensor is kicking in to protect the engine.

Engine knock is a condition where the fuel inside the engine ignites prematurely and occurs within an engine running at high compression. (It can also be caused by other factors including low octane/poor quality fuel or hot spots within the engine.)

Read the full guide...

The best tuning mods

What are the best tuning mods for your car? There is a lot of debate in our forums but we have compiled a list of the best tuning mods for this article based on feedback from our members.

We are going to ignore the most popular mods, as these often only turn out to be aesthetic upgrades rather than performance upgrades.

Read the full guide...

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