Inches to cm converter
One inch is exactly 2.54 centimeters. To convert inches to cm, multiply the number of inches by 2.54.
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72 inches =
182.88cm
Formula: cm = in × 2.54
Show the steps
- Definition: 1 in = 2.54 cm exactly; 1 cm = 0.01 m (SI prefix centi)
- 72 in × 2.54 = 182.88 cm
Definitions used: 1 in = 2.54 cm exactly; 1 cm = 0.01 m (SI prefix centi).
Source: NIST SP 811, Appendix B.8, checked on .
How to convert inches to centimeters
Multiply the value in inches by 2.54. The factor follows from the definitions: 1 in = 2.54 cm exactly, and 1 cm = 0.01 m (SI prefix centi).
cm = in × 2.54
Worked example: 72 in to cm
- Definition: 1 in = 2.54 cm exactly; 1 cm = 0.01 m (SI prefix centi)
- 72 in × 2.54 = 182.88 cm
- Answer: 72 in = 182.88 cm.
Inches to centimeters chart
| Inches (in) | Centimeters (cm) |
|---|---|
| 0.25 | 0.635 |
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 15 | 38.1 |
| Inches (in) | Centimeters (cm) |
|---|---|
| 20 | 50.8 |
| 24 | 60.96 |
| 30 | 76.2 |
| 32 | 81.28 |
| 36 | 91.44 |
| 40 | 101.6 |
| 48 | 121.92 |
| 55 | 139.7 |
| 60 | 152.4 |
| 65 | 165.1 |
| 72 | 182.88 |
Values rounded to 6 significant digits. Type any other number in the converter at the top of the page.
How do you convert feet and inches to cm?
Turn the feet into inches (× 12), add the remaining inches, then multiply by 2.54. For 5 ft 9 in: 5 × 12 + 9 = 69 in, and 69 × 2.54 = 175.26 cm. You can type “5 ft 9 in to cm” in the bar on the home page and get the same steps.
How big is a 55-inch or 65-inch TV in cm?
TV sizes are the diagonal of the screen. A 55-inch screen measures 139.7 cm corner to corner and a 65-inch screen 165.1 cm. The width is smaller: on a 16:9 screen it is about 87% of the diagonal.
More questions about inches and centimeters
How many cm is 1 inch?
Exactly 2.54 cm. This is the definition of the international inch, so there is nothing to round.
How many cm is 12 inches?
12 inches (one foot) is 30.48 cm.
What is a quick way to estimate inches in cm?
Multiply by 2.5: double the inches and add half of the original number. 8 in → 16 + 4 = 20 cm; the exact value is 20.32 cm.
How many cm is a 32-inch waist?
A 32-inch waist is 81.28 cm, and a 34-inch waist is 86.36 cm.
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Sources and limits
- NIST SP 811, Appendix B.8
NIST Special Publication 811, Guide for the Use of the SI, Appendix B.8: Factors for Units Listed Alphabetically (page updated August 18, 2025).
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.