Inches to Centimeters Converter
Convert inches to centimeters instantly. 1 in equals exactly 2.54 cm. Use the converter above, or the formula, worked example and table below for common lengths.
Live formula: 1 in → cm
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How to Use the Inches to Centimeters Converter
- 1. Enter a value in the left input field — the converter is already set to Inch (in) to Centimeter (cm).
- 2. Read the instant converted value and review the live formula line.
- 3. Use the swap button to reverse the direction, or copy either amount.
- 4. Check the table below for common inches to cm conversions.
Inches to Centimeters Converter Formula
centimeters = inches × 2.54
Worked example: 12 in × 2.54 = 30.48 cm — Exactly one foot.
Inch (in) to Centimeter (cm) Conversion Table
| From Unit | To Unit | Input | Result |
|---|---|---|---|
| Inch (in) | Centimeter (cm) | 1 | 2.54 |
| Inch (in) | Centimeter (cm) | 2 | 5.08 |
| Inch (in) | Centimeter (cm) | 5 | 12.7 |
| Inch (in) | Centimeter (cm) | 10 | 25.4 |
| Inch (in) | Centimeter (cm) | 12 | 30.48 |
| Inch (in) | Centimeter (cm) | 20 | 50.8 |
| Inch (in) | Centimeter (cm) | 36 | 91.44 |
| Inch (in) | Centimeter (cm) | 100 | 254 |
Did You Know?
- The inch is defined as exactly 2.54 cm, a definition agreed internationally in 1959.
- One foot is exactly 12 inches, or 30.48 cm.
Frequently Asked Questions
How many cm is 1 inch?
1 inch equals exactly 2.54 cm.
How do I convert inches to cm?
Multiply the inches by 2.54 — for example, 12 in × 2.54 = 30.48 cm.
What is 5 ft 9 in in cm?
5 feet 9 inches is 69 inches, and 69 × 2.54 = 175.26 cm.
Why is the conversion exact?
The inch was redefined in 1959 as exactly 2.54 cm, so inches and centimeters convert without any rounding.