CM to Inches Calculator
Convert centimeters to inches and inches to centimeters with height conversion charts and formulas
Height breakdown
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Conversion formula (1 inch = 2.54 cm exactly)
inches = cm ÷ 2.54 · cm = inches × 2.54
Quick Conversions (common heights)
How we calculated this
CM to Inches Height Chart
| Centimeters | Inches | Feet & Inches | Meters |
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Authoritative sources and references
The official standards, guidelines, and research behind this calculator's methodology.
CM to Inches Conversion FAQ
How many inches is 1 cm?
One centimeter equals approximately 0.3937 inches. The exact conversion uses the international definition 1 inch = 2.54 cm, so inches = cm ÷ 2.54.
How tall is 170 cm in feet and inches?
170 cm equals 66.93 inches, which is 5 feet 6.9 inches — commonly written as 5′7″. The calculator shows this breakdown automatically for any height you enter.
Why is 1 inch exactly 2.54 cm?
Since the 1959 International Yard and Pound Agreement, the inch has been defined as exactly 2.54 centimeters. Before that, the US and UK inches differed slightly (about 2.5400005 cm and 2.539997 cm).
How do I convert inches back to centimeters?
Multiply by 2.54. For example, a 32-inch TV screen is 32 × 2.54 = 81.28 cm. This calculator works in both directions — type in either field and the other updates instantly.
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