Convert Inches to cm
Convert inches to centimeters instantly — exact factors, common-value table, nothing uploaded.
Common conversions
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Inches to centimeters, the metric side of every US size
Screen diagonals, wrench sizes, lumber dimensions, TV panels — so much of the stuff you buy is specified in inches, while instructions, wall mounts and international specs speak centimeters. The bridge is exact: 1 inch = 2.54 cm, by international agreement since 1959.
This page presets the converter to inches on the left and centimeters on the right. Type 24 and you immediately see 60.96 — a 24-inch monitor, minus the bezel, on a metric tape measure.
The table below covers the values that come up constantly, from a single inch to common TV and hardware sizes. Everything is computed locally in your browser; no value is ever sent anywhere.
Quick conversion table
Common values at a glance — computed locally with exact standard factors.
| Value (in) | Converted (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
How to convert inches to cm
Type the value in inches
Fractions on a tape measure? Convert the decimal form, e.g. 3.5 for 3½ inches.
Read the result in cm
Exact multiplication by 2.54, displayed to six significant digits.
Flip when needed
The swap button reverses direction to cm-to-inches, keeping the value in place.
FAQs about this conversion
How many cm is 1 inch exactly?
Exactly 2.54 cm — the inch has been defined that way since the 1959 international yard and pound agreement.
What is 12 inches in cm?
12 in = 30.48 cm. One foot, handy to remember: roughly 30 cm for quick mental estimates.
Why do TV sizes look bigger in cm?
They do not change size — a 55-inch TV is 139.7 cm diagonal, and the same panel in cm is just a longer number. The converter avoids mixing diagonal and width, which is the usual source of confusion.
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