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Updated for 2025/266 tools reviewed

The best car and transport calculators for 2026.

Six calculators that turn the murky maths of car ownership into a clear monthly figure — petrol, electric or somewhere in between.

Buying and running a car involves dozens of costs that are easy to overlook. From depreciation eating away at your vehicle’s value to the daily cost of fuel, understanding the true expense of motoring helps you make smarter decisions.

We compared the best car and transport calculators on accuracy, comprehensiveness and ease of use.

Our picks for 2025/26

  1. Editor’s pick
    01

    Editor’s pick

    Car Loan Calculator

    Monthly car finance payments based on loan amount, rate and term. See total interest payable and full cost.

    Monthly payment breakdown
    Total interest
    Flexible terms
    Compare APRs

    Best for: Anyone financing a car through a personal loan, HP or PCP.

    Try Car Loan Calculator
  2. 02

    Runner-up

    Car Depreciation Calculator

    Estimate how much your car will lose in value over time. Often the single largest cost of ownership.

    Year-by-year curve
    Percentage & £ loss
    Adjustable rates
    Residual value estimate

    Best for: Buyers and sellers estimating ownership costs and trade-in value.

    Try Car Depreciation Calculator
  3. 03

    Highly rated

    Fuel Cost Calculator

    Calculate fuel cost for any journey or annual driving. Custom mpg and current fuel prices.

    Per-journey & annual
    Petrol & diesel
    Custom fuel economy
    Current prices

    Best for: Commuters, road trippers, and anyone comparing vehicles.

    Try Fuel Cost Calculator
  4. 04

    Pick 4

    Electric vs Petrol Calculator

    Compare total cost of ownership between EV and petrol side by side. Covers purchase, fuel, tax, insurance and maintenance.

    Side-by-side comparison
    5-year projection
    Fuel vs electricity
    Tax & incentive savings

    Best for: Drivers considering switching to electric.

    Try Electric vs Petrol Calculator
  5. 05

    Pick 5

    Car Running Cost Calculator

    Complete picture of yearly running costs — fuel, insurance, road tax, MOT, servicing and depreciation.

    All cost categories
    Annual & monthly totals
    Cost-per-mile
    Customisable inputs

    Best for: Budget-conscious drivers and families deciding to keep or replace.

    Try Car Running Cost Calculator
  6. 06

    Pick 6

    EV Charging Cost Calculator

    Calculate cost to charge your EV at home or public stations. Compare home tariffs with public network pricing.

    Home vs public
    Battery & efficiency
    Cost per mile
    Annual estimate

    Best for: EV owners and prospective buyers.

    Try EV Charging Cost Calculator

How we ranked these

  • 01

    Accuracy

    Results verified against real-world data and manufacturer specifications.

  • 02

    Comprehensiveness

    Covers all major cost categories, not just one.

  • 03

    Clarity

    Clear breakdowns showing how each figure was calculated.

  • 04

    Up-to-date

    Current fuel prices, tax rates and insurance averages.

  • 05

    No barriers

    Free to use, no registration required.

Frequently asked

The total cost goes beyond the monthly payment — depreciation (the biggest cost for new cars), insurance, fuel/electricity, road tax (VED), servicing, MOT, and repairs. Our car running cost calculator combines all of these into a single annual and monthly figure.

Use arrow keys to navigate items, Enter or Space to expand/collapse.

Browse the full car calculators index

Every calculator in this category, sorted alphabetically.

See all car calculators