You want to memorize that there are exactly 2.54 cm in an inch.
Using Google.com is the quickest way to convert units. By just typing in a phase such as
6.5 inches in cm
The reply that Google's gives you is...
6.5 inches = 16.51 centimeters
Algebraic Steps / Dimensional Analysis Formula6.5 in*
2.54 cm
1 in
=
16.51 cm
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65 inches equals 165.1 centimeters.
65 inches = 165.1 centimeters
12 inches to the foot and 2.5 centimeters to the inch = (5 x 12) + 5 = 65 inches x 2.5 to get centimeters =162.5 centimeters
6.5 centimeters = about 2.5 inches (2.55905512 inches)
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