Inches to Centimeters

One inch equals exactly 2.54 centimeters. This conversion factor is standardized internationally and used for all imperial-to-metric length conversions.

In 1959, English-speaking countries agreed to define the inch as exactly 25.4 millimeters (2.54 cm) to standardize international measurements. This replaced earlier slightly different definitions.

Yes, just convert feet to inches first (multiply by 12), add any remaining inches, then multiply the total by 2.54. For example, 5 feet 6 inches = 66 inches = 167.64 cm.

Yes, there's only one standard inch used today. Historical variants like the French inch no longer exist in common use, so 2.54 cm applies universally.

For everyday use, rounding to one decimal place (like 30.5 cm) is fine. For engineering or scientific work, use two or more decimal places to maintain precision.