How do you convert 345 cm to feet?
345cm / 2.54cm/in / 12 in/ft = 11.3 feet
First you need conversion units. The accuracy of the final result will depend on the accuracy of the units. With three significant figures given, I will use 2.54 cm/inch as my basic conversion from metric to English systems. Then I will use 12 inches/foot for the final conversion.
If you need to do a conversion multiple times you can combine the conversions into one useful unit, such as cm/foot. 30.48 cm/ft, or 0.0329 ft/cm.