Dot per inch to Dot per millimeter Converter
無料画像解像度換算ツール, DPI、PPI、CMあたりのドット数、MMあたりのピクセルを瞬時に換算
Dot per inch
- Symbol
- DPI
- System
- Metric/Imperial
- Dimension
- Various
Dot per millimeter
- Symbol
- dot/mm
- System
- Metric/Imperial
- Dimension
- Various
Quick Reference Table
| Dot per inch | Dot per millimeter | Dot per millimeter | Dot per inch |
|---|---|---|---|
| 1 | 0.0393700787 | 1 | 25.4 |
| 2 | 0.0787401575 | 2 | 50.8 |
| 3 | 0.1181102362 | 3 | 76.2 |
| 5 | 0.1968503937 | 5 | 127 |
| 10 | 0.3937007874 | 10 | 254 |
| 25 | 0.9842519685 | 25 | 635 |
| 50 | 1.968503937 | 50 | 1270 |
| 100 | 3.937007874 | 100 | 2540 |
| 500 | 19.6850393701 | 500 | 12700 |
| 1000 | 39.3700787402 | 1000 | 25400 |
Conversion Formula
Dot per millimeter = Dot per inch × 0.0393700787
Dot per inch = Dot per millimeter × 25.4
Factors are from BIPM SI brochure and NIST SP 811, stored unrounded and computed via a base unit. Reverse factor is 1 ÷ 0.0393700787.
How to convert Dot per inch to Dot per millimeter
Multiply the value in dot per inch by 0.0393700787 to get dot per millimeter. For example, 5 Dot per inch = 0.1968503937 Dot per millimeter. All results in the image resolution converter update instantly as you type, so you can see every unit at once without manual math.
Common mistakes
Do not round the factor to 0.03 too early — keep full precision until the final display. For image resolution, always verify critical calculations (medicine, engineering) with a second source.
FAQ
- How many Dot per millimeter in 1 Dot per inch?
- 1 Dot per inch = 0.0393700787 Dot per millimeter.
- How many Dot per inch in 1 Dot per millimeter?
- 1 Dot per millimeter = 25.4 Dot per inch.
- What is the source?
- BIPM/NIST via OmniConverter base-unit engine. Source table and formula above are exact.
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