Inch to Centimetre Converter

About the Inch to Centimetre Converter

Inches and centimetres may live on opposite sides of the metric fence, but you will encounter both almost every day, which is exactly why a reliable inches to cm converter earns its place in your bookmarks. Buy a new television, choose a laptop or a mobile phone, order clothes online, measure a shelf gap for a bookcase, or read a tyre specification — the size is just as likely to be quoted in inches as in centimetres, and the two rarely appear side by side on the same label. The maths here is unusually clean because the conversion is fixed by international agreement. Since 1959, 1 inch has been defined as exactly 2.54 centimetres. To convert inches into centimetres you multiply by 2.54, and to reverse the direction you divide by 2.54. So 1 inch is 2.54 cm, 10 inches is 25.4 cm, and a 24-inch monitor measures 60.96 cm across its diagonal. A 32-inch TV comes out at 81.28 cm, and the popular 55-inch screen size is a 139.7 cm diagonal. When you multiply by 2.54, the arithmetic stays exact, and the calculator on this page does it for you both ways in an instant. The most practical everyday use is probably screen sizing, because display dimensions are still quoted in inches almost everywhere — televisions, computer monitors, phones, tablets and projector screens are all measured across the diagonal in inches. Clothes and shoe sizing are another frequent case, since many brands from the US label garments in inches while European and UK patterns use centimetres. In building and plumbing, copper pipe and timber dimensions are often given in inches, but European suppliers list the same items in millimetres and centimetres, so a quick conversion prevents buying the wrong part. Watch out for two common traps. First, remember that the diagonal of a screen does not describe its width or height — a 55-inch diagonal tells you little about the actual stand footprint, so use the aspect ratio if you need the real dimensions. Second, do not round 2.54 to 2.5 for critical work; over a 24-inch measurement that loses a full centimetre. For a rough mental estimate you can treat 2.5 as good enough, but for fitment and sizing this page gives you the exact figure every time, in both directions. It is also worth keeping a few familiar references in mind. A sheet of A4 paper is about 8.27 by 11.69 inches, which makes a useful visual guide: roughly 21 by 29.7 cm. A standard door frame is 80 inches (203.2 cm) tall, and a regulation association football goal spans 24 feet or 288 inches, which is 731.5 cm. If you are measuring your own height, you will most often be working in feet and inches, but converting just the inch portion straight to centimetres is a handy way to check a passport or driving licence form that asks for height in centimetres. Whether you are choosing a monitor, cutting a length of timber, or buying clothing that fits, the quickest way to keep both systems straight is to enter the inch value here and read the exact centimetre equivalent.