Inch to Centimeter Converter
Convert Inch (in) to Centimeter (cm). Results update as you type, with a conversion table and the formula below.
1 in =
2.54 cm
in to cm conversion table
| in | cm |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 7 | 17.78 |
| 8 | 20.32 |
| 9 | 22.86 |
| 10 | 25.4 |
| 15 | 38.1 |
| in | cm |
|---|---|
| 20 | 50.8 |
| 25 | 63.5 |
| 30 | 76.2 |
| 40 | 101.6 |
| 50 | 127 |
| 60 | 152.4 |
| 70 | 177.8 |
| 80 | 203.2 |
| 90 | 228.6 |
| 100 | 254 |
How to use
- Type the in value to convert.
- The result appears instantly in cm; the swap button reverses direction.
- For common values, check the conversion table below.
Frequently asked questions
How many cm is 1 in?+
1 in = 2.54 cm. The table below lists the values you'll reach for most often.
How wide is a 27-inch monitor really?+
27 inches is about 68.6cm measured diagonally. On a 16:9 panel that works out to roughly 59.8cm wide and 33.6cm tall. Reading the inch figure as a width overestimates the size considerably.
How accurate are the results?+
The math uses internationally standardized definitions; only the display is rounded to significant digits. Accurate enough for school, work and daily life.
How do I convert cm back to in?+
Hit the swap arrows in the middle of the converter above — the direction flips and your value is kept.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
The formula
1 in equals 2.54 cm — multiply a in value by 2.54 to get cm. Example: 5 in × 2.54 = 12.7 cm.
Going the other way, 1 cm = 0.393701 in — multiply by 0.393701, or hit the swap button on the converter above.
When is this conversion needed?
Useful whenever metric meets inches, feet and miles: overseas clothing and shoe sizes, monitor and TV specs, furniture dimensions and map distances.
Where centimetres meet inches
Screens are the classic case. A 27-inch or 55-inch figure is the diagonal, not the width, so checking whether a display fits a desk or a cabinet means working out the actual width and height separately. Overseas clothing measurements, print sizes (4×6 inches) and furniture dimensions are quoted in inches too.