Converters
Inches to Centimeters Converter
Convert inches to centimeters with the exact 2.54 factor. Enter inches for an instant result, swap direction when needed, and use the table for quick lookups.
Inches to Centimeters Converter
Enter an inch value to convert it to centimeters instantly.
Decimals and zero are supported. Results use four decimal places.
Common values (in)
Result
30.48cm
12 inches equals 30.48 centimeters.
Centimeters · shown to 4 decimal places, trailing zeros removed
Formula: centimeters = inches × 2.54
Formula
How to convert inches to cm
Multiply the number of inches by 2.54. The same exact factor applies whether you are measuring a phone screen or a doorway.
The inch and the centimeter are linked by an exact definition: one inch is 2.54 centimeters. That makes the arithmetic simple. For example, 12 inches × 2.54 = 30.48 centimeters. Because 12 inches is one foot, 30.48 centimeters is also the metric length of one foot.
To go back to inches, divide the centimeter result by 2.54, or use the swap button in the calculator. The centimeters to inches converter handles that direction with the same precision.
Inches → centimeters
cm = in × 2.54
Multiply the inch value by 2.54 to get centimeters.
12 in × 2.54 = 30.48 cm
Centimeters → inches
in = cm ÷ 2.54
Divide the centimeter value by 2.54 to return to inches.
91.44 cm ÷ 2.54 = 36 in
1 in
1 × 2.54
= 2.54 cm
12 in
12 × 2.54
= 30.48 cm
70 in
70 × 2.54
= 177.8 cm
Quick table
Inches to centimeters conversion table
Common inch values, from a single inch up to one hundred inches.
| Inches (in) | Centimeters (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 |
| 12 | 30.48 |
| 15 | 38.1 |
| 18 | 45.72 |
| 20 | 50.8 |
| 24 | 60.96 |
| 30 | 76.2 |
| 36 | 91.44 |
| 40 | 101.6 |
| 50 | 127 |
| 60 | 152.4 |
| 70 | 177.8 |
| 100 | 254 |
Values are calculated with the exact factor 1 in = 2.54 cm and rounded to four decimal places.
Context
Why inches still matter
Inches remain the default unit for many products and trades in the United States, including lumber, screens, pipes, and clothing sizes. International products and technical specifications often use centimeters instead. Converting between the two is a routine part of shopping, building, and comparing measurements across countries.
The conversion is exact, but the way a measurement is rounded can still affect a project. A nominal 2×4 piece of lumber, for example, is not exactly 2 inches by 4 inches. Always use the actual measured dimensions when precision matters rather than the product's name or nominal size.
For related tools, see the centimeters to feet converter and the comparison of inches and centimeters. Both explain how the units are used and where rounding can matter.
Answers
Frequently asked questions
Quick answers to the questions people ask most about this conversion.
Have another question? Contact CMtoIN.
How many centimeters are in an inch?
One inch equals exactly 2.54 centimeters. This is an international standard, so the factor does not vary between countries.
How do you convert inches to centimeters?
Multiply the inch value by 2.54. For example, 12 inches × 2.54 = 30.48 centimeters. The calculator above performs the same calculation instantly.
What is 12 inches in centimeters?
Twelve inches equals 30.48 centimeters, which is exactly one foot. This is useful when converting American or imperial dimensions into metric values.
What is 36 inches in centimeters?
Thirty-six inches equals 91.44 centimeters. Since 36 inches is one yard, 91.44 centimeters is also one yard in metric units.
What is 5 feet 10 inches in centimeters?
Five feet 10 inches is 70 inches in total. Multiply 70 by 2.54 to get 177.8 centimeters.
Can I convert centimeters back to inches?
Yes. Use the swap button to reverse the calculator, or divide the centimeter value by 2.54 manually.
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