All Free Car & Vehicle Calculators
Browse all 98 free calculators across 10 categories. Every tool is free, works on any device, and requires no signup.
Calculate fuel costs, MPG, journey fuel usage, and compare petrol vs diesel running costs.
MPG Calculator
Calculate your car's miles per gallon from distance and fuel used.
Fuel Cost Calculator
Work out the fuel cost for any journey based on distance and fuel price.
Journey Fuel Calculator
Calculate how much fuel you need for a specific journey.
Litres Per 100km Calculator
Convert your fuel consumption to the European litres per 100km standard.
Fuel Tank Range Calculator
Find out how far you can drive on a full tank of fuel.
Annual Fuel Cost Calculator
Estimate your total yearly fuel spending based on mileage and consumption.
Petrol vs Diesel Calculator
Compare the total running costs of petrol and diesel versions of the same car.
E10 vs E5 Calculator
Compare the cost difference between E10 and E5 (premium) petrol.
Fuel Price Comparison Calculator
Compare fuel prices and see how much you save by shopping around.
Miles Per Litre Calculator
Calculate your fuel economy in miles per litre.
Calculate tyre sizes, diameters, wheel offsets, speedometer corrections, and tyre pressure.
Tyre Size Calculator
Decode tyre size markings and find compatible alternative sizes.
Tyre Diameter Calculator
Calculate the overall diameter of any tyre from its size code.
Tyre Width Comparison Calculator
Compare two tyre sizes and see the differences in width, diameter, and circumference.
Wheel Offset Calculator
Calculate wheel offset and see how different offsets affect your wheel position.
Speedometer Correction Calculator
Find out how changing tyre size affects your speedometer reading.
Tyre Pressure Calculator
Convert tyre pressures between PSI, bar, and kPa.
Tyre Wear Calculator
Estimate remaining tyre life based on current tread depth and wear rate.
Bolt Pattern Calculator
Calculate bolt pattern PCD from measurements between wheel studs.
Wheel Spacer Calculator
Work out what thickness wheel spacers you need for your desired offset.
Tyre Age Calculator
Decode the DOT date code on your tyres to find their age.
Calculate total car running costs, depreciation, cost per mile, and compare lease vs buy options.
Car Running Cost Calculator
Calculate the total monthly and annual running costs of your car.
Depreciation Calculator
Estimate how much your car will depreciate over time.
Cost Per Mile Calculator
Calculate the true cost of driving each mile including all expenses.
Lease vs Buy Calculator
Compare the total cost of leasing versus buying a car.
Car Tax Calculator
Calculate your annual UK vehicle excise duty (road tax) based on CO2 emissions.
MOT Cost Calculator
Estimate your annual MOT and potential repair costs.
Service Cost Calculator
Estimate annual servicing costs based on service type and interval.
Breakdown Cover Calculator
Compare the value of different breakdown cover levels based on your driving.
Total Cost of Ownership Calculator
Calculate the complete cost of owning a car over any period.
Commuting Cost Calculator
Work out your daily, weekly, and annual commuting costs.
Convert power units, calculate power-to-weight ratios, quarter mile times, and gear ratios.
BHP to KW Converter
Convert between brake horsepower and kilowatts.
Torque Converter
Convert torque between Nm, lb-ft, and kgf-m.
0-60 Calculator
Estimate 0-60 mph time from power, weight, and drivetrain.
Power to Weight Calculator
Calculate your car's power-to-weight ratio in BHP per tonne.
Quarter Mile Calculator
Estimate quarter mile time and trap speed from power and weight.
Top Speed Calculator
Estimate theoretical top speed from power, drag coefficient, and frontal area.
Engine CC Calculator
Calculate engine displacement in cc from bore, stroke, and cylinder count.
Compression Ratio Calculator
Calculate engine compression ratio from chamber and swept volumes.
Gear Ratio Calculator
Calculate overall gear ratios and road speed at any RPM.
Turbo Boost Calculator
Estimate power gains from turbo boost pressure.
Calculate towing capacity, trailer weights, nose weights, and vehicle dimensions.
Towing Capacity Calculator
Check if your car can safely tow a specific trailer or caravan.
Trailer Weight Calculator
Calculate the total weight of your loaded trailer.
Nose Weight Calculator
Calculate the correct nose weight for safe towing.
Roof Rack Load Calculator
Check if your roof load is within safe limits.
Boot Volume Calculator
Calculate usable boot space volume in litres.
Turning Circle Calculator
Calculate the turning circle from wheelbase and steering angle.
Parking Space Calculator
Check if your car fits in a parking space with door-opening clearance.
Ground Clearance Calculator
Calculate effective ground clearance with load and suspension changes.
Wading Depth Calculator
Check safe wading depth based on your vehicle's air intake height.
Load Area Calculator
Calculate the load area and volume of a van or estate car.
Calculate EV range, charging times and costs, battery degradation, and compare EV vs petrol costs.
EV Range Calculator
Estimate real-world EV range based on battery size and efficiency.
Charging Time Calculator
Calculate how long it takes to charge an EV at different power levels.
Charging Cost Calculator
Work out the cost to charge your EV at home or at public chargers.
EV vs Petrol Calculator
Compare the total running costs of an EV versus a petrol car.
Battery Degradation Calculator
Estimate how your EV battery capacity will decrease over time.
Home Charger Calculator
Calculate the payback period for installing a home EV charger.
Public Charging Calculator
Compare costs across different public charging networks.
EV Efficiency Calculator
Calculate your EV's efficiency in miles per kWh.
Solar Charging Calculator
Estimate how much free EV charging you can get from solar panels.
Battery Size Calculator
Calculate what battery size you need for your daily driving needs.
Calculate insurance groups, no claims discounts, car loans, PCP deals, and mileage allowances.
Insurance Group Calculator
Estimate your car's insurance group and understand what affects it.
No Claims Discount Calculator
Calculate how much your no claims bonus saves on your premium.
Gap Insurance Calculator
Calculate the gap between your car's value and finance outstanding.
Car Loan Calculator
Calculate monthly payments, total interest, and total cost for a car loan.
PCP Calculator
Calculate PCP monthly payments, total cost, and optional final payment.
HP Calculator
Calculate hire purchase monthly payments and total cost.
Car Value Calculator
Estimate your car's current value based on age, mileage, and condition.
Mileage Allowance Calculator
Calculate HMRC mileage allowance payments for business travel.
Calculate oil change intervals, brake pad life, coolant mixes, and other maintenance schedules.
Oil Change Calculator
Calculate when your next oil change is due based on mileage and time.
Brake Pad Life Calculator
Estimate how long your brake pads will last based on driving style.
Coolant Mix Calculator
Calculate the correct ratio of coolant to water for your climate.
Windscreen Wiper Size Calculator
Find the correct wiper blade sizes for your windscreen.
Battery Life Calculator
Estimate your car battery's remaining life based on age and usage.
Timing Belt Calculator
Calculate when your timing belt is due for replacement.
Air Filter Calculator
Calculate when your air filter needs replacing based on driving conditions.
Spark Plug Calculator
Calculate spark plug replacement intervals based on plug type and usage.
Tyre Rotation Calculator
Calculate the correct tyre rotation pattern and interval for your car.
Fluid Capacity Calculator
Calculate the fluid capacities for oil, coolant, washer, and brake fluid.
Calculate journey times, average speeds, rest stops, carbon footprint, and road trip budgets.
Journey Time Calculator
Calculate estimated journey time from distance and average speed.
Speed Distance Time Calculator
Calculate any one of speed, distance, or time from the other two.
Average Speed Calculator
Calculate average speed from multiple journey segments.
Rest Stop Calculator
Calculate recommended rest stops for long journeys based on Highway Code guidelines.
Motorway Fuel Calculator
Calculate fuel needed for motorway journeys with higher consumption rates.
Carbon Footprint Calculator
Calculate the CO2 emissions from your car journey.
Toll Calculator
Calculate toll costs for UK toll roads and crossings.
Congestion Charge Calculator
Calculate London Congestion Charge and ULEZ costs for your vehicle.
Ferry Loading Calculator
Calculate vehicle dimensions and weight for ferry booking requirements.
Road Trip Budget Calculator
Plan a complete road trip budget including fuel, tolls, and stops.
Convert between common automotive units: speed, distance, pressure, torque, and temperature.
MPH to KPH Converter
Convert between miles per hour and kilometres per hour.
Miles to Kilometres Converter
Convert distances between miles and kilometres.
Litres to Gallons Converter
Convert between litres and UK/US gallons.
PSI to Bar Converter
Convert tyre pressures between PSI, bar, and kPa.
Nm to ft-lb Converter
Convert torque values between Newton-metres and foot-pounds.
BHP to PS Converter
Convert between brake horsepower, PS (metric horsepower), and kW.
Cubic Inches to CC Converter
Convert engine displacement between cubic inches and cubic centimetres.
mpg to L/100km Converter
Convert fuel economy between UK mpg and litres per 100km.
Inches to mm Converter
Convert between inches and millimetres for automotive parts.
Fahrenheit to Celsius Converter
Convert temperatures between Fahrenheit and Celsius.
Why Use CarCalcs?
Every calculator on this page is completely free, requires no signup, and works on any device. Get accurate results instantly with clear breakdowns you can trust.
CarCalcs gives you 98+ specialist calculators across 10 categories. Results include detailed breakdowns and let you input your own prices for cost estimates tailored to your needs.