Millimeters to Inches (mm to in)
Free online millimeter to inch converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
LENGTH CONVERTER — INSTANT RESULT
Formula: multiply the millimeter value by 0.039370079 — i.e. in = mm × 0.039370079
Quick check: 1 mm = 0.039370079 in
Quick check: 1 mm = 0.039370079 in
Millimeters to Inches conversion table
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.039370079 in |
| 2 mm | 0.078740157 in |
| 3 mm | 0.11811024 in |
| 4 mm | 0.15748031 in |
| 5 mm | 0.19685039 in |
| 6 mm | 0.23622047 in |
| 7 mm | 0.27559055 in |
| 8 mm | 0.31496063 in |
| 9 mm | 0.35433071 in |
| 10 mm | 0.39370079 in |
| 15 mm | 0.59055118 in |
| 20 mm | 0.78740157 in |
| 25 mm | 0.98425197 in |
| 30 mm | 1.18110236 in |
| 40 mm | 1.57480315 in |
| 50 mm | 1.96850394 in |
| 75 mm | 2.95275591 in |
| 100 mm | 3.93700787 in |
| 250 mm | 9.84251969 in |
| 500 mm | 19.68503937 in |
| 1,000 mm | 39.37007874 in |
How to convert millimeters to inches
To convert millimeters to inches, multiply the amount in millimeters by 0.039370079. For example, 10 mm = 0.39370079 in. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric and imperial/US customary length units, plus nautical, astronomical and survey units. The meter is the SI base unit of length; all factors below are exact definitions where a legal definition exists.
Frequently asked questions
How many inches are in one millimeter?
One millimeter is exactly 0.039370079 inches.
How do I convert mm to in?
Multiply the mm value by 0.039370079 to get in. The converter at the top of this page does this automatically and works in both directions.
How much is 100 millimeters in inches?
100 millimeters equals 3.93700787 inches.