📐 Inch to CM Converter
Convert inches to centimetres instantly. Quick imperial to metric conversion.
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How to Convert Inches to Centimetres
To convert inches to centimetres, multiply by 2.54. This is the exact, internationally agreed conversion factor — 1 inch is defined as exactly 2.54 cm. So 12 inches (one foot) equals exactly 30.48 cm, and 6 feet equals 182.88 cm.
Height is the most common use case. If you know your height in feet and inches, multiply the total inches by 2.54 to get your height in centimetres. For example, 5 feet 9 inches is 69 inches total, which equals approximately 175.3 cm. This is useful for medical forms, travel documents, and online fitness profiles that ask for metric measurements.
Screen and display sizes are always stated as diagonal measurements in inches — a 27-inch monitor is 68.6 cm diagonally. If you're measuring a desk space or TV cabinet in centimetres and want to check whether a screen will fit, this conversion is exactly what you need.
In construction and interior design, many UK and builders use a mix of imperial and metric depending on the materials supplier. Tiles, pipes, and timber are often measured in millimetres or centimetres, but some fittings (particularly imported American ones) still use inches. Having this converter handy avoids costly measurement mistakes.
Common Inch to CM Conversions
1 inch = 2.54 cm | 6 inches = 15.24 cm | 12 inches = 30.48 cm | 24 inches = 60.96 cm | 36 inches = 91.44 cm | 72 inches = 182.88 cm
How to Convert Inches to Centimetres
To convert inches to centimetres, multiply by 2.54. This is the exact internationally defined conversion: 1 inch = 2.54 centimetres. The formula is: cm = inches × 2.54. To go from centimetres back to inches, divide by 2.54.
Inch-to-centimetre conversion is needed constantly in construction, clothing (screen sizes, waist measurements, inseam lengths), printing, medical records, and any cross-regional context where imperial and metric systems meet.