What is 31 inches to centimeters? The answer is that 31 inches equals 78.74 centimeters.
How to convert 31 inches to cm? We know that one inch is equal to 2.54 centimeters, so to convert 31 inches to centimeters, we must multiply the amount of centimeters by 2.54, which means that 31 inches is equal to 31 inches × 2.54 = 78.74 cm.
See also: How to convert 31 cm to inches.