mm to Inches Converter
Convert millimeters to inches — or inches back to mm. Type any value and get the result instantly. Click any result to copy it.
mm to Inches Conversion Table
| Millimeters | Inches (decimal) | Inches (fraction) |
|---|---|---|
| 1 mm | 0.0394" | 3/64" |
| 2 mm | 0.0787" | 5/64" |
| 3 mm | 0.1181" | 1/8" |
| 4 mm | 0.1575" | 5/32" |
| 5 mm | 0.1969" | 13/64" |
| 6 mm | 0.2362" | 15/64" |
| 8 mm | 0.3150" | 5/16" |
| 10 mm | 0.3937" | 25/64" |
| 12 mm | 0.4724" | 15/32" |
| 15 mm | 0.5906" | 19/32" |
| 20 mm | 0.7874" | 25/32" |
| 25 mm | 0.9843" | 63/64" |
| 25.4 mm | 1.0000" | 1" |
| 30 mm | 1.1811" | 1 3/16" |
| 50 mm | 1.9685" | 1 31/32" |
| 85.6 mm | 3.3701" | 3 3/8" |
| 100 mm | 3.9370" | 3 15/16" |
Frequently Asked Questions
How many inches is 1 mm?
1 millimeter equals 0.03937 inches. Since 1 inch = 25.4 mm exactly, 1 mm = 1 ÷ 25.4 = 0.03937 inches.
How do you convert mm to inches?
Divide the millimeter value by 25.4. Formula: inches = mm ÷ 25.4. For example, 50 mm ÷ 25.4 = 1.969 inches. To reverse, multiply inches by 25.4 to get mm.
How many mm is 1 inch?
Exactly 25.4 mm. Since 1959, 1 inch has been defined as exactly 25.4 millimeters by international agreement.
How many mm is 1/4 inch?
1/4 inch = 6.35 mm. Multiply 0.25 × 25.4 = 6.35 mm.
How many mm is 1/2 inch?
1/2 inch = 12.7 mm. Multiply 0.5 × 25.4 = 12.70 mm.
How many mm is 3/4 inch?
3/4 inch = 19.05 mm. Multiply 0.75 × 25.4 = 19.05 mm.
How many mm is a credit card?
A standard credit card is 85.6 mm wide and 54 mm tall (ISO 7810 ID-1 standard). That is 3.370 × 2.126 inches.