Odometer is nothing but a device or instrument that displays the total distance traveled by the vehicle. This instrument is available mechanical, electronic or the combination of both. Every country has the different name for this instrument in their vehicle such as tripometer, milometer, and mileometer. This system is used since the ancient times, but in different manners. With the improvement in technology this system also got modern. In today’s world, people can also find odometer with digital display. The unit displayed on the odometer can be in kilometer or miles as depended on the different countries. Most people as well as vehicle manufacturers prefer to the digital over the analog ones because of the precession of the reading. The analog odometer is not that much precise as it will have at least 5 percent that can make a big different while calculating the fuel economy of the vehicle. Now the researchers are also trying to make new type of odometer based on the real time GPS system that will allow person to count the exact amount of distance traveled.