not knowing what car, i suggest looking in owner's manual for "ENGLISH-METRIC switch location and/or procedure. it may also be marked as :
"ENG-MET". /if not lucky finding, i suggest being much more specific with
year, make, model in your question for the guru - folks here, or drive to
your local (like-kind of car) dealership & ask, while out and about in your
daily travels/. They will show you how, free. NOTICE: all of this is assuming
that you have a digital speedo cluster made for U.S., not Canada-only sold.
end-of-answer.
Km/h
The least count of an odometer is determined by the smallest division or increment that the odometer can measure. To find it, look at the smallest digit on the odometer scale; for example, if the odometer's smallest division is 0.01 km, then its least count is 0.01 km. This value indicates the minimum distance the odometer can accurately record.
should have both if u are in U.S... Mile will be the better number, if u are in Canada, KM will be the bigger number on the odometer
a shop
Multiply by 1.61.
To convert kilometers to miles, you can use the conversion factor where 1 kilometer is approximately equal to 0.621371 miles. Therefore, to change the odometer reading from kilometers to miles, you would multiply the number of kilometers by this factor. For example, if your Ducati 999 odometer reads 999 km, it would be approximately 620.6 miles (999 km * 0.621371).
Replace the dash board.
That depends on what country for which it was manufactured. Example is if it were built as a US vehicle it is in MHP. If it were built as a Canadian vehicle it is in KM
615 km
2040 - 1650 = 390 km 390 km divided by 4 hours = 97.5 km per hour
Need to get the service guy to do this with computer. Very Complicated.
I had a honda civic for 8 years and the odometer was 321785 km