How many Inches is 100 cm? Centimeter belongs to the metric system of measurement while inch is a part of the US customary measurement system. Instant free online tool for centimeter to foot conversion or vice versa. The centimeter [cm] to foot [ft] conversion table and conversion steps are also listed. Also, explore tools to convert centimeter or foot to other length units or learn more about length conversions. How many cm in 1 inches? The answer is 2.54. We assume you are converting between centimetre and inch. You can view more details on each measurement unit: cm or inches The SI base unit for length is the metre. 1 metre is equal to 100 cm, or 39.370078740157 inches. Note that rounding errors may occur, so always check the results. What is 100x100 cm in inches? How many square inches is 100 cm x 100 cm? Convert 100 cm x 100 cm to inches or sq in.