Convert inches to centimeters (cm) and cm to inches with exact decimals, millimeters, feet & inches, and nearest 1/16" and 1/32" fractions.
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The Inch to CM Converter provides instantaneous, bidirectional conversion between imperial inches and metric centimeters based on the international yard and pound agreement of 1959, where 1 inch is defined as exactly 2.54 centimeters.
1\text{ in} = 2.54\text{ cm} = 25.4\text{ mm}, \quad 1\text{ cm} = \frac{1}{2.54} \approx 0.393700787\text{ in}The conversion factor 2.54 is mathematically exact by international treaty.
Scenario: Converting 10 inches to centimeters
Formula: cm = inches × 2.54
cm = 10 × 2.54 = 25.4 cm
In millimeters: 25.4 × 10 = 254 mm
There are exactly 2.54 centimeters in 1 inch.
Divide the number of centimeters by 2.54, or multiply centimeters by 0.3937. For example, 50 cm / 2.54 ≈ 19.685 inches.
5 feet 7 inches equals 67 total inches. 67 × 2.54 = 170.18 cm.
Multiply the decimal portion by 16 (for 16ths of an inch) or 32 (for 32nds) and round to the nearest whole integer. For example, 0.625 × 16 = 10/16 = 5/8".
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