Dot per millimeter to Dot per inch Converter
1 dot per millimeter is exactly 25.4 dots per inch. Convert dots per millimeter (dot/mm) to dots per inch (dpi) below: type a value and the result updates as you type.
dot/mm to dpi calculator
Result
Dot per millimeter to Dot per inch conversion
1 dot/mm = 25.4 dpione dot per millimeter in dots per inch
1 dpi ≈ 0.03937007874 dot/mmone dot per inch in dots per millimeter
Dot per millimeter (dot/mm): Number of dots per millimeter. Used for label and thermal printers (8 dot/mm is about 203 dpi).
Dot per inch (dpi): Number of printed dots per inch (25.4 mm). The usual unit for printers and scanners.
Source:Dot per millimeter: SI Brochure, 9th edition (BIPM, 2019); Dot per inch: International yard and pound agreement (1959)
How to convert dots per millimeter to dots per inch
To convert dots per millimeter to dots per inch, multiply the number of dots per millimeter by 25.4.
Formula
dpi = dot/mm × 25.4
Examples
- 5 dot/mm = 5 × 25.4 = 127 dpi
- 25 dot/mm = 25 × 25.4 = 635 dpi
- 100 dot/mm = 100 × 25.4 = 2540 dpi
Dot per millimeter to Dot per inch conversion table
| Dot per millimeter (dot/mm) | Dot per inch (dpi) |
|---|---|
| 0.1 dot/mm | 2.54 dpi |
| 0.5 dot/mm | 12.7 dpi |
| 1 dot/mm | 25.4 dpi |
| 2 dot/mm | 50.8 dpi |
| 3 dot/mm | 76.2 dpi |
| 5 dot/mm | 127 dpi |
| 10 dot/mm | 254 dpi |
| 20 dot/mm | 508 dpi |
| 25 dot/mm | 635 dpi |
| 50 dot/mm | 1270 dpi |
| 100 dot/mm | 2540 dpi |
| 250 dot/mm | 6350 dpi |
| 500 dot/mm | 12700 dpi |
| 1000 dot/mm | 25400 dpi |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many dots per inch are in one dot per millimeter?
- One dot per millimeter is exactly 25.4 dots per inch.
- How do I convert dots per inch to dots per millimeter?
- To convert dots per inch to dots per millimeter, divide the number of dots per inch by 25.4. The formula is dot/mm = dpi ÷ 25.4.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 25.4 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a dot per millimeter or a dot per inch?
- A dot per millimeter is 25.4 times larger than a dot per inch. In other words, a dot per inch is about 0.03937007874 of a dot per millimeter.