Inch to Millimeter Converter
Convert Inches to Millimeters
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How to Convert Inches to Millimeters
Converting inches (in) to millimeters (mm) involves converting from the imperial system to the metric system. One inch is equal to 25.4 millimeters.
Formula
Millimeters = Inches × 25.4
or
mm = in × 25.4
Step-by-step process
- Take the measurement in inches
- Multiply that number by 25.4
- The result is the equivalent amount in millimeters
Examples
- 1 inch = 25.4 millimeters
- 10 inches = 254 millimeters
- 0.5 inches = 12.7 millimeters
When to Convert Inches to Millimeters
This conversion is useful when working with international standards, manufacturing, or any field requiring interoperability between imperial and metric measurements.
Common Inches to Millimeters Conversions
Here is a table of common inch to millimeter conversions for quick reference:
| Inches (in) | Millimeters (mm) | Inches (in) | Millimeters (mm) |
|---|---|---|---|
| 1 | 25.4 | 100 | 2,540 |
| 2 | 50.8 | 200 | 5,080 |
| 5 | 127 | 500 | 12,700 |
| 10 | 254 | 1,000 | 25,400 |
Frequently Asked Questions
How many millimeters are in an inch?
There are exactly 25.4 millimeters in one inch.
Why is the conversion factor 25.4?
The inch is defined as exactly 2.54 centimeters, which is 25.4 millimeters.