Toolrack

Fuel Cost Calculator

Works offlineNothing is uploadedFree, no sign-up
fill the tank, drive, fill again — the second fill is this number
CONSUMPTION—
KM PER LITRE—
mpg (US gallon)—
mpg (UK gallon)—

Everything is computed in this tab — nothing is sent anywhere.

The two numbers every driver actually wants: your car's real consumption per 100 km from one fill-up, and what a given trip will cost at today's fuel price.

One honest tankful beats the brochure

Manufacturers measure consumption on a laboratory cycle; your commute has hills, traffic and a boot full of shopping. One full-to-full measurement captures all of it, and from then on every trip is two multiplications: distance × consumption ÷ 100 gives litres, litres × price gives money.

That second line is the useful one before any long drive: at 8 L/100km and today's price, Baku to Qəbələ and back stops being a guess and becomes a figure you can compare with the bus.

Frequently asked questions

How do I measure my real consumption?

The full-to-full method: fill the tank until the pump clicks off, reset the trip meter, drive normally, fill to the click again. The litres of the second fill over the kilometres on the meter is your true figure — the dashboard computer usually flatters by 5–10%.

Why litres per 100 km and not km per litre?

Because it adds linearly: a 250 km trip at 8 L/100km is exactly 20 litres, arithmetic you can do at the pump. km/L is shown too, but consumption maths and every European car spec run on the /100km form.

Does city vs highway matter?

Enormously — city driving typically burns 20–40% more. Measure a tank of your usual mix and the figure already reflects your life rather than the brochure.

Why is my dashboard figure lower than the fill-up figure?

Trip computers estimate from injector timing and flatter by 5–10%; the pump measures what actually went in. When they disagree, believe the pump — it is the one you pay.

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