Learn about our RFC process, Open RFC meetings & more.Join in the discussion! »


6.3.34 • Public • Published

autocosts – car costs calculator

Build Status Known Vulnerabilities Dependency Status js-standard-style npm npm module downloads

This calculator allows users to find the true cost of owning a car. It will normally give them a good estimate of what they really need to spend on car ownership. As car payments and expenses come due throughout the year, it's often difficult to really get a good understanding of total spending on a car. This calculator also provides to the user, optionally, the car's full Financial Effort considering the user's income, further providing also optionally the equivalent public transport costs (bus, train, UBER, etc.), considering the user doesn't own a car.

Try it on your machine

  1. Clone the project
    git clone https://github.com/jfoclpf/autocosts.git
  2. Enter the newly created directory and install dependencies
    cd autocosts/ && npm i --production
  3. Start the server
    npm start

it will open a http local server which you can access through http://localhost:3028





The list of available countries


The translations are in corresponding json files, namely in the folder src/countries/.
The list of available countries is from the file src/countries/list.json

World statistics of Car Costs


How does it work?

Autocosts uses nodejs, expressjs and handlebarsjs to supply a server application that renders a car costs calculator as a webpage loaded by any common browser.

The project is optimized for a web-based version, and for an APP developped in Apache Cordova. The 2 last letters on the URI stands for the 2-letter ISO country code, and not for the language, since for example United Kingdom and Australia have the same language but different realities concerning the taxes, the terms applied to automobile costs and the units for fuel efficiency. The translations/language files apply therefore only to the selected country.

The project already considers all the units and fuel efficiency cases, different in many countries. The variations for fuel efficiency are l/100km, km/l, mpg(US), mpg(imp) and for distance are km, miles and mil (Nordic mile=10km). More information can be found in the directory src/countries/.

For more information regarding how the costs are calculated, you can check the src/client/core/ which is based on the 12 items that form the car costs for any given country. Namely they are:

  • Standing costs
    • Depreciation
    • Car taxes
    • Insurance
    • Inspection
    • Car finance
  • Running costs
    • Fuel
    • Maintenance
    • Repairs and Improvements
    • Parking
    • Tolls
    • Fines
    • Car washes

For more information see contributing.md

Aditional services

Autocosts supports the following additional services, which can be enabled or disabled (default). After building with node build.js, run node bin/server.js -h for more information.


Autocosts also supports code such that the user inputs might be stored into a mysql database. With the data from said database, it is also possible to make several statisitcal analysis, namely the average costs for each country, said statistical analysis having outlier removal techniques, such that such outliers do not distort the average.


Autocosts may use the UBER API, such that at the final repport, the user calculations can be compared with the equivalents costs if the user would use just UBER or combined with public transports.


Autocosts also allows the final report to be printed into a PDF report. It makes use of pdfmake npm package.

Credentials file

The credentials for the above services are in the JSON files stored in credentials/


Install the api

npm i autocosts

Now use the autocosts api

const autocosts = require('autocosts')
// see https://github.com/jfoclpf/autocosts/blob/master/contributing.md#standards
// for standard units and time periods
var userData = {
  countryCode: 'US',
  currency: 'USD',
  depreciation: {
    dateOfAcquisition: {
      month: 5,
      year: 2001,
      valueOfTheVehicle: 25000
    dateOfUserInput: {
      month: 2,
      year: 2020,
      valueOfTheVehicle: 5000
  insurance: {
    amountPerPeriod: 200,
    period: 'month'
  credit: {
    creditBool: true,
    yesCredit: {
      borrowedAmount: 15000,
      numberInstallments: 48,
      amountInstallment: 350,
      residualValue: 0
  inspection: {
    averageInspectionCost: 120,
    numberOfInspections: 15
  roadTaxes: {
    amountPerYear: 120
  // Form Part 2
  fuel: {
    typeOfCalculation: 'distance', // type string: "money" or "distance"
    currencyBased: {
      amountPerPeriod: null,
      period: null // type string: "month", "twoMonths",  "trimester", "semester", "year"
    distanceBased: {
      considerCarToJob: true, // boolean
      carToJob: {
        daysPerWeek: 5,
        distanceBetweenHomeAndJob: 15,
        distanceDuringWeekends: 30,
        distanceStandardUnit: 'mi' // standard distance for current country: "km", "mil" or "mil(10km)"
      noCarToJob: {
        distancePerPeriod: null,
        period: null, // type string: "month", "twoMonths",  "trimester", "semester", "year"
        distanceStandardUnit: null // type string: "km", "mil" or "mil(10km)"
      fuelEfficiency: 25, // fuel efficiency of the vehicle
      fuelEfficiencyStandard: 'mpg(US)', // type string; "ltr/100km", "mpg(US)", etc.
      fuelPrice: 2.5, // type number; currency per unit of volume standard. Ex: 1.4, that is 1.4 EUR / ltr
      fuelPriceVolumeStandard: 'gal(US)' // type string: 'ltr', 'gal(UK)', 'gal(US)'
  maintenance: {
    amountPerYear: 700
  repairsImprovements: {
    amountPerYear: 200
  parking: {
    amountPerMonth: 14
  tolls: {
    calculationBasedOnDay: true, // true or false
    yesBasedOnDay: {
      amountPerDay: 2.5,
      daysPerMonth: 22
    noBasedOnDay: {
      amountPerPeriod: null,
      period: null // type string: "month", "twoMonths",  "trimester", "semester", "year"
  fines: {
    amountPerPeriod: 40,
    period: 'year' // type string: "month", "twoMonths",  "trimester", "semester", "year"
  washing: {
    amountPerPeriod: 110,
    period: 'year' // type string: "month", "twoMonths",  "trimester", "semester", "year"
var results = autocosts.calculate(userData)

The object results will be the following:

  "countryCode": "US",
  "currency": "USD",
  "costs": {
    "totalPerYear": 6595.880952380952,
    "totalEver": 123672.76785714286,
    "perMonth": {
      "items": {
        "depreciation": 88.88888888888889,
        "insurance": 200,
        "credit": 8,
        "inspection": 8,
        "roadTaxes": 10,
        "fuel": 78.26785714285715,
        "maintenance": 58.333333333333336,
        "repairsImprovements": 16.666666666666668,
        "parking": 14,
        "tolls": 55,
        "fines": 3.3333333333333335,
        "washing": 9.166666666666666
      "standingCosts": 344.0555555555556,
      "runningCosts": 205.60119047619048,
      "total": 549.656746031746
    "perUnitDistance": {}
  "standardUnits": {
    "speed": "mi/h",
    "distance": "mi",
    "fuelEfficiency": "mpg(US)",
    "fuelPriceVolume": "gal(US)"

The financial effort of the user and alternative costs considering public transports, uber and taxis included, are also optionally calculated. See the standard userData object for more information.

Android APP

The Android APP can be found in Play Store. It uses Apache Cordova to convert JavaScript built code into APP built files (for example APK files in Android)




This calculator is and shall always be completely anonymous, as it doesn't request nor permanently store, any name, email, cookies, IP address nor any other personal information.


npm i autocosts

DownloadsWeekly Downloads






Unpacked Size

72.5 MB

Total Files


Last publish


  • avatar