Inches to Centimeters Converter
Convert inches to centimeters instantly with this free inches to centimeters converter. Enter any value to get an accurate length conversion, plus the formula, the conversion factor and a full reference table.
What is 1 inch in centimeters?
1 inch is equal to exactly 2.54 centimeters.
1 × 2.54 = 2.54 centimeters
1 inch = 2.54 centimeters
Inches to Centimeters formula
cm = in × 2.54
The inches to centimeters conversion factor is 2.54, which is exact by definition. 1 inch = 2.54 centimeters, and 1 centimeter = 0.393700787402 inches.
Worked examples
- 2 inches = 5.08 centimeters — 2 × 2.54 = 5.08 centimeters
- 6 inches = 15.24 centimeters — 6 × 2.54 = 15.24 centimeters
- 10 inches = 25.4 centimeters — 10 × 2.54 = 25.4 centimeters
Inches to Centimeters conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 30 in | 76.2 cm |
| 50 in | 127 cm |
| 75 in | 190.5 cm |
| 100 in | 254 cm |
| 500 in | 1,270 cm |
| 1,000 in | 2,540 cm |
When you need to convert inches to centimeters
- Buying furniture, TVs or appliances listed in one system and fitting them into a room measured in the other.
- Following building plans, sewing patterns or DIY instructions written abroad.
- Reading height, screen size or luggage limits when travelling between the US and the rest of the world.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Inch (in)
- A US quarter is about 1 inch across
- Standard printer paper is 8.5 inches wide
Centimeter (cm)
- A standard pencil is about 19 cm long
- A US letter page is 21.6 cm wide
Mental shortcut
Multiply by 2.5 and add a touch. 10 in → 25 cm (exact 25.4).
Common mistakes to avoid
- Dividing when you should multiply. Because 1 inch = 2.54 centimeters, the answer should be larger than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
For everyday measurements round to the nearest whole unit or to one decimal place. Machining, sewing and construction usually need at least two decimals — and it is worth measuring in the target unit directly when tolerance matters.
How these units are defined
- Inch (in): Exactly 25.4 millimeters; the base small unit of US customary and Imperial length. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Centimeter (cm): One hundredth of a meter, widely used for body and object measurements. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 inch in centimeters?
- 1 inch is equal to 2.54 centimeters.
- How many inches are in one centimeter?
- There are 0.393700787 inches in 1 centimeter.
- How do you convert inches to centimeters?
- Multiply the number of inches by 2.54 — or use the formula cm = in × 2.54.
- What is 6 inches in centimeters?
- 6 inches is 15.24 centimeters. 6 × 2.54 = 15.24 centimeters.
- Is the inches to centimeters conversion exact?
- Yes. The relationship is fixed by definition, so 2.54 is an exact conversion factor — only the displayed result is rounded.