Inches to cm Converter (Inches to Centimeters)

Inches to Centimeters (in to cm)

1 in = 2.54 cm. Type any value to convert it.

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1 inch =

2.54 cm

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How to convert inches to centimeters

1 in = 2.54 cm

1 in = 2.54 cm exactly; NIST Handbook 44 traces the exact US value to the 1959 Federal Register notice. Multiply inches by 2.54.

63 in = 160.02 cm: Combined bag dimensions at which Delta's oversize fees begin (Delta Air Lines)
27 in = 68.58 cm: Lower imperial circumference figure for a match football (IFAB)
12 in = 30.48 cm: A one-foot ruler

Published metric equivalents may be rounded: Delta shows 63 in as 161 cm, but the exact value is 160.02 cm.
Convert fractions to decimals first: 5/8 in is 0.625 in, which is exactly 1.5875 cm.

Exactly 2.54 centimeters. The international inch is fixed at 2.54 cm, so this conversion involves no rounding.

Multiply the inches by 2.54. For instance, 12 inches × 2.54 = 30.48 cm. Round only at the end to keep the answer accurate.

It is a mental shortcut. The exact figure is 2.54 cm, so the shortcut undershoots by about 1.6%, or 1.2 cm over 30 inches.

63 inches is exactly 160.02 cm. Delta lists its 63-inch oversize threshold as 161 cm, so published metric equivalents are sometimes rounded.