This question cannot be answered with the information given. Please specify a unit to convert into centimeters.
Each meter is 100 cm, so two and a half meters in centimeters is 250 centimeters. Try googling "two and a half meters in centimeters."
Two and a half centimeters.
250 centimeters
250 centimeters
The answer depends on what is meant by "two in a half". To most English-speaking people it has no meaning.
500 centimeters
There are 797 centimeters in 797 centimeters.
2.5 in = 6.35 cm
3.5cm
1.27 centimeters
Half an inch equals 1.27 centimeters.
A penny, the smallest American coin, is roughly two and a half centimeters in diameter.