Quirkulator

Vehicle Running Cost Calculators

12 calculators covering fuel use, trip cost and cost per mile, each with its formula and worked examples.

Vehicle Running Cost Calculators brings together 12 calculators for fuel use, trip cost and cost per mile, including Car Depreciation Calculator, Engine Displacement Calculator, Fuel Savings Comparison Calculator and MPG Calculator.

Every page states its method up front — which formula, which convention, which assumptions — because those choices change the answer, and a calculator that hides them is only pretending to be precise.

All 12 pages compute in your browser: nothing you type is sent anywhere, and results update as you edit. Each one carries worked examples, interpretation bands where a score needs context, and a FAQ answering what people actually ask about that calculation.

The collection is part of Vehicles & Fuel, and every page links to the neighbouring calculations you usually need next.

12 pages in this collection

Car Depreciation CalculatorDeclining-balance residual value, with a separate first-year drop and cost per mile.Cost per Mile CalculatorTrue pence per mile once fuel, insurance, tax, servicing and depreciation are counted.Engine Displacement CalculatorSwept volume in cc from bore, stroke and cylinder count, with cubic inches.Fuel Cost CalculatorWork out what a journey costs in fuel from distance, economy and pump price.Fuel Savings Comparison CalculatorCompare two cars on annual fuel spend and see how long a price premium takes to repay.Gear Ratio Speed CalculatorRoad speed from engine rpm, gearbox ratio, final drive and tyre size.Litres per 100 km CalculatorConvert mpg, km per litre or miles per litre into litres per 100 kilometres.MPG CalculatorMeasure real fuel economy from two odometer readings and one brim-to-brim fill.Road Trip Time CalculatorRealistic journey time including rest breaks, fuel stops and an arrival time.Towing Capacity Margin CalculatorCheck a trailer or caravan against the towing limit, kerbweight ratio and noseweight.Trip Fuel Usage CalculatorHow many litres a route will swallow, and whether you can do it on one tank.Tyre Size Diameter CalculatorTurn a 205/55 R16 sidewall marking into a real diameter, circumference and speedo error.

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