How do you calculate the taxi fares / rates?
The Guru Take
RideGuru and TaxiFareFinder both support taxi fares.
RideGuru's comparison calculator supports taxi fares. You can also use a site like https://www.taxifarefinder.com/
If you are curious more about how taxi fares are calculated by the taximeters, you may find this resource useful: https://www.taxifarefinder.com/faq.php. It is based on duration and distance.