Conversion Result
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Centimeters (cm)
About This Converter
- What it does
- Converts inches to centimeters with reverse conversion.
- Input
- Length in inches (in)
- Output
- Centimeters (cm); reverse inches value
- Formula
- cm = inches × 2.54 (exact)
- Last updated
About Inches to Centimeters Conversion
The inch is an imperial unit used primarily in the United States, the United Kingdom, and Canada, while the centimeter belongs to the International System of Units (SI) used worldwide. Converting inches to centimeters is essential whenever you work with international product specifications, import clothing or shoes, or follow metric construction standards. One inch equals exactly 2.54 centimeters.
Conversion Formula
cm = inches × 2.54
Multiply the inch value by 2.54 to get centimeters. To reverse, divide centimeters by 2.54. The factor 2.54 is an exact international standard.
Worked Example
Convert 6 inches to cm: 6 × 2.54 = 15.24 cm. Another: 12 inches (1 foot) × 2.54 = 30.48 cm.
Common Use Cases
- Buying imported clothes or shoes online — size charts often require centimeters
- Converting TV/monitor screen diagonal sizes from inches to centimeters for European shoppers
- Construction: converting US blueprint dimensions (inches) to metric for compliance
- Tailoring: converting seam allowances from inches to cm for non-US clients
- Medical measurements — US doctors may list wound sizes in inches; international records use cm
Frequently Asked Questions
1 inch = 2.54 cm exactly. This is the internationally defined conversion.
5 inches × 2.54 = 12.7 cm.
6 inches × 2.54 = 15.24 cm.
12 inches = 30.48 cm, which is exactly 1 foot in metric.
36 inches (1 yard) × 2.54 = 91.44 cm, or 0.9144 m.
A quick mental trick: multiply inches by 2.5 and add 1.6% of the result. Example: 10 in × 2.5 = 25, plus 1.6% ≈ 0.4, giving 25.4 cm. For rough estimates, just multiply by 2.5.
It is exact. The international inch has been defined as exactly 2.54 cm since 1959 under the International Yard and Pound Agreement.
5 ft 7 in = (5 × 12 + 7) = 67 inches. 67 × 2.54 = 170.18 cm.
Important Notes
- 1 in = 2.54 cm is exact — defined internationally since 1959.
- Fractions of inches (e.g. 1/4 in = 0.25 in) can be entered as decimals.
- For feet + inches input, convert first: feet × 12 + inches = total inches, then use this converter.
- Results are shown to 4 decimal places; round to 2 for general use.