Centimeters to Inches Converter
Convert between centimeters and inches instantly. Includes a quick-reference table, fractional inches, and common real-world measurements.
cm → Inches
Inches → cm
cm to Inches Conversion Table
| cm | Inches (decimal) | Inches (fraction) | cm | Inches (decimal) | Inches (fraction) |
|---|---|---|---|---|---|
| 1 | 0.394 | ≈ 3/8" | 30 | 11.811 | 11 13/16" |
| 2 | 0.787 | ≈ 25/32" | 40 | 15.748 | 15 3/4" |
| 2.54 | 1.000 | 1" | 50 | 19.685 | 19 11/16" |
| 5 | 1.969 | ≈ 2" | 75 | 29.528 | 29 1/2" |
| 10 | 3.937 | 3 15/16" | 100 | 39.370 | 39 3/8" |
| 15 | 5.906 | 5 29/32" | 150 | 59.055 | 59 1/16" |
| 20 | 7.874 | 7 7/8" | 180 | 70.866 | 70 7/8" |
| 25 | 9.843 | 9 27/32" | 200 | 78.740 | 78 3/4" |
Common Measurements in cm and Inches
| Object / Context | cm | Inches | Notes |
|---|---|---|---|
| Credit Card (width) | 8.56 | 3.37" | ISO/IEC 7810 standard |
| US Dollar Bill (length) | 15.6 | 6.14" | All denominations |
| iPhone 15 (height) | 14.76 | 5.81" | Standard model |
| A4 Paper (width) | 21.0 | 8.27" | International standard |
| US Letter Paper (width) | 21.59 | 8.5" | US standard |
| Average Male Height (US) | 175.4 | 69.1" (5'9") | CDC NHANES 2023 |
| Average Female Height (US) | 161.3 | 63.5" (5'3.5") | CDC NHANES 2023 |
| Standard Door (height) | 203.2 | 80" (6'8") | US residential standard |
| King Bed (width) | 193 | 76" | Standard US king |
| 1 Meter | 100 | 39.37" | SI base unit |
Understanding Centimeters and Inches
The centimeter (cm) is a metric unit equal to one-hundredth of a meter. The inch is an imperial unit equal to exactly 2.54 centimeters — this relationship was fixed internationally in 1959 by agreement among the US, UK, Canada, Australia, New Zealand, and South Africa. Before 1959, the inch varied slightly between countries, causing engineering problems in international trade.
Today, only three countries — the United States, Myanmar, and Liberia — have not officially adopted the metric system, although the US uses metric extensively in science, medicine, and military contexts. The dual-system reality means conversion between cm and inches remains one of the most frequently performed calculations worldwide, especially in clothing sizing, screen dimensions, and construction.
Clothing and Body Measurement Context
International clothing sizes use centimeters while US sizes use inches. When shopping from international brands, you'll need to convert waist (e.g., 81 cm = 32"), chest (e.g., 102 cm = 40"), and inseam (e.g., 76 cm = 30") measurements. Our BMI Calculator and Ideal Weight Calculator accept both metric and imperial inputs. For body measurements, see the Waist-to-Hip Ratio Calculator.
Screen Size Context
Monitor and TV screen sizes are measured diagonally in inches worldwide — even in metric countries. A "27-inch monitor" is 68.58 cm diagonally. However, the actual viewing dimensions depend on aspect ratio: a 27" 16:9 monitor is approximately 59.8 cm (23.5") wide and 33.6 cm (13.2") tall. When shopping for monitors, the diagonal measurement alone doesn't tell the whole story.
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