If you need to convert inches to cm or cm to inches, the math is simple once you know the base conversion:
- 1 inch = 2.54 cm
- 1 cm = 0.3937 inches
That covers most everyday conversions, whether you are checking product dimensions, measuring furniture, working on a DIY project, or comparing sizes across metric and imperial systems.
If you want the fast route, use our Length Conversion Calculator for instant results.
Inches to cm formula
To convert inches to centimeters:
centimeters = inches × 2.54
Examples
- 1 inch = 2.54 cm
- 5 inches = 12.7 cm
- 10 inches = 25.4 cm
- 12 inches = 30.48 cm
- 20 inches = 50.8 cm
Cm to inches formula
To convert centimeters to inches:
inches = centimeters ÷ 2.54
Examples
- 1 cm = 0.3937 inches
- 10 cm = 3.94 inches
- 20 cm = 7.87 inches
- 30 cm = 11.81 inches
- 50 cm = 19.69 inches
Quick conversion table
| Inches | Centimeters |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 10 | 25.4 |
| 12 | 30.48 |
| 24 | 60.96 |
| 36 | 91.44 |
| Centimeters | Inches |
|---|---|
| 1 | 0.39 |
| 5 | 1.97 |
| 10 | 3.94 |
| 20 | 7.87 |
| 30 | 11.81 |
| 50 | 19.69 |
| 100 | 39.37 |
When people usually need this conversion
- checking screen sizes
- comparing product dimensions on international websites
- measuring furniture or wall space
- converting sewing, craft, or DIY measurements
- understanding height and length specs in metric vs imperial formats
Is it better to use a calculator?
Yes, especially if:
- the number is not round
- you are converting multiple values
- you want to avoid decimal mistakes
- you need to switch between more than two units
That is exactly what the Length Conversion Calculator is for.
FAQ
What is 1 inch in cm?
1 inch = 2.54 cm.
What is 1 cm in inches?
1 cm = 0.3937 inches.
How do I convert inches to cm quickly?
Multiply inches by 2.54.
How do I convert cm to inches quickly?
Divide centimeters by 2.54.
Is this useful for product sizes and DIY measurements?
Yes. This is one of the most common everyday unit conversions for shopping, home projects, and dimensions.