DailyDeskTools home

Free Car Rental Calculators

Work out what a rental will really cost before you book or return the car, including fuel, extra days and mileage charges.

Daily Desk Tools is independent and not affiliated with any rental company. Always check your rental agreement for the exact terms.

5 live tools2 in developmentAll free, all private

Ready to use

Car Maintenance Schedule

Track oil changes, tire rotations and other services by mileage, and see what is due next.

Fuel Cost Calculator

Estimate the fuel cost of a trip or shift, in miles or kilometers, and split it between people.

Fuel Economy Converter

Convert between US MPG, UK MPG, L/100 km and km/L instantly.

Km to Miles Converter

Convert kilometers and miles both ways, plus km/h to mph for driving abroad.

Rental Car Cost Calculator

Estimate the full cost of a rental car, including fees, insurance, extras and mileage charges.

On the roadmap

Coming soon

Free, private and in your browser, like everything else here.

In development

Fuel Prepay vs Refill Calculator

Compare prepaying for fuel with refilling it yourself.

Want it sooner? Let us know
In development

Rental Days Calculator

Count billable rental days from pickup and return times.

Want it sooner? Let us know

Car Rental: common questions

Are these prices from rental companies?

No. You enter the rates from your own quote or agreement, and the tool does the math. We do not pull live prices from any company.

Are you affiliated with a rental company?

No. Daily Desk Tools is independent and not affiliated with or endorsed by any car rental brand.