Millimeters to Inches Converter
Convert millimeters to inches instantly. Perfect for engineering, design, crafts, and precise measurements.
MM to Inches Calculator
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Conversion Formula
Formula:
inches = mm ÷ 25.4To convert mm to inches, divide the millimeter value by 25.4. This conversion factor is based on the international definition where 1 inch equals exactly 25.4 millimeters.
Common MM to Inches Conversions
| Millimeters (mm) | Inches (in) | Common Reference |
|---|---|---|
| 1 mm | 0.0394" | Thin wire diameter |
| 5 mm | 0.1969" | Pencil lead thickness |
| 10 mm | 0.3937" | Small screw diameter |
| 25 mm | 0.9843" | Quarter coin diameter |
| 50 mm | 1.9685" | Golf ball diameter |
| 100 mm | 3.9370" | Smartphone width |
| 150 mm | 5.9055" | Credit card length |
| 200 mm | 7.8740" | Standard envelope width |
Real-World Example
Pencil Length Conversion
A pencil that is 175 mm long is approximately 6.89 inches.
Calculation: 175 ÷ 25.4 = 6.89 inches
Frequently Asked Questions