Depends a bit on the design, if you're using the stock tires or not, if you run with different loads a lot, and how stable your tire pressure is. But most will be accurate to within 1-2%
If the vehicle has an analog odometer, there is no way of telling the exact mileage. Vehicles with digital odometers usually have an accurate record of millage stored in the vehicle's computer. But note that early digital odometers kept track of mileage on a computer chip that could be changed to reflect an inexact reading.
Chevrolet began using 6-digit odometers in 1965. This change allowed for a higher mileage reading compared to the previous 5-digit odometers, which maxed out at 99,999 miles. The adoption of 6-digit odometers became standard in many vehicles to accommodate longer trips and usage.
1
Yes
Km/h
An odometer is a machine that displays distance travelled. Odometers can show any number of digits ans so any number of miles.
Electronic speedometers/odometers do work in both directions. The old cable driven speedometers/odometers ran backwards in while reverse.
Canadian car odometers transitioned to metric measurements in 1977. This change was part of Canada's broader shift to the metric system, which aimed to standardize measurements across the country. Consequently, vehicles sold in Canada after this date featured odometers displaying distances in kilometers instead of miles.
On older cars with turn dial odometers, yes you can. On newer cars with electronic odometers, no you cannot. It is considered illegal in some states to do this, and bad practice by all.
Speedotomoter Drive Gear
Rulers, tape measures, laser range finders, odometers.
Hydrometer, hygrometer, micrometer, millimeter, odometer, spectrometer, speedometer, thermometer