Convert inches to centimeters and cm to inches. Also shows mm, meters, feet, and feet+inches. Quick table, visual meter bar, and object size reference.
The inch-to-centimeter conversion is one of the most commonly searched unit conversions. With the exact defined relationship of 1 inch = 2.54 centimeters, this conversion is needed daily for screen sizes, product dimensions, clothing measurements, construction, crafts, and international sizing.
This bidirectional converter handles both inches → centimeters and centimeters → inches. It also shows millimeters, meters, feet, and the mixed feet-inches notation. A visual bar shows the result relative to one meter, and presets load common values like a ruler length (12 inches / 30.48 cm), letter paper dimensions, and standard screen sizes.
Whether you are comparing TV screen sizes between markets, converting clothing measurements for international shopping, sizing picture frames, or working with mixed-system blueprints, this converter provides precise results with useful context. It also makes cross-checking vendor specs and measurement notes much easier during purchasing and setup across online catalogs and printed guides. This reduces avoidable size mismatches before checkout or installation.
Inches and centimeters appear together in electronics, clothing, home improvement, and product listings, so people frequently need reliable cross-system conversion. This tool provides quick bidirectional results and related units in one place, helping users compare measurements clearly, avoid ordering mistakes, keep documentation consistent across regional standards, and complete purchasing decisions with fewer size-related surprises.
1 inch = 2.54 centimeters (exact, by definition) 1 centimeter = 0.393701 inches Centimeters = Inches × 2.54 Inches = Centimeters ÷ 2.54
Result: 30.48 centimeters
12 inches × 2.54 cm/inch = 30.48 cm. This is the length of a standard 12-inch ruler, which is exactly 30.48 centimeters.
The inch was defined in 1959 as exactly 25.4 millimeters, making 1 inch = 2.54 cm by definition. This end centuries of slightly different inch lengths used by different countries. The conversion is now mathematically exact, not an approximation.
Screen sizes: TVs, monitors, and phones are sold by diagonal inches everywhere. Clothing: international size charts convert between inches and centimeters. Construction: blueprints may mix imperial and metric dimensions. Crafts: patterns from different countries use different systems.
1/8" = 0.3175 cm, 1/4" = 0.635 cm, 3/8" = 0.9525 cm, 1/2" = 1.27 cm, 5/8" = 1.5875 cm, 3/4" = 1.905 cm, 7/8" = 2.2225 cm. American construction commonly uses fractions down to 1/16" (0.15875 cm).
Exactly 2.54 centimeters, by international definition since 1959.
Approximately 0.3937 inches (1/2.54).
In 1959, an international agreement defined the inch as exactly 25.4 millimeters (2.54 cm). This is not a measurement — it is a definition.
Convert the fraction to decimal first: 3/8" = 0.375". Then multiply by 2.54: 0.375 × 2.54 = 0.9525 cm.
32 inches × 2.54 = 81.28 cm diagonal. The actual width depends on the aspect ratio.
Screen sizes and pipe/fitting sizes use inches worldwide. The UK uses inches informally. Japan uses inches for TV sizes. Most other measurements have transitioned to metric.