Pixels per inch to pixels per millimeter
Type a value in PPI to get it in px/mm instantly.
18.11px/mm
That's about the same as a flagship phone. Beyond about 18.98 cm, 20/20 eyes can no longer make out single pixels.
What it means
How sharp is that?
The viewing distance uses the one-arcminute rule for 20/20 vision; sharper eyes can see a little further. Screen values are typical for each class.
The math
How to convert PPI to px/mm
To convert pixels per inch to pixels per millimeter, multiply by 0.0393701.
Example: 460 PPI × 0.0393701 = 18.1102 px/mm.
In the other direction, 1 px/mm = 25.4 PPI.
Every unit
Your pixel density in every unit
Tables
PPI to px/mm conversion table
| PPI | px/mm |
|---|---|
| 72 PPI | 2.83465 px/mm |
| 96 PPI | 3.77953 px/mm |
| 110 PPI | 4.33071 px/mm |
| 150 PPI | 5.90551 px/mm |
| 200 PPI | 7.87402 px/mm |
| 250 PPI | 9.84252 px/mm |
| 300 PPI | 11.811 px/mm |
| 400 PPI | 15.748 px/mm |
| 460 PPI | 18.1102 px/mm |
| 600 PPI | 23.622 px/mm |
px/mm to PPI conversion table
| px/mm | PPI |
|---|---|
| 72 px/mm | 1,828.8 PPI |
| 96 px/mm | 2,438.4 PPI |
| 110 px/mm | 2,794 PPI |
| 150 px/mm | 3,810 PPI |
| 200 px/mm | 5,080 PPI |
| 250 px/mm | 6,350 PPI |
| 300 px/mm | 7,620 PPI |
| 400 px/mm | 10,160 PPI |
| 460 px/mm | 11,684 PPI |
| 600 px/mm | 15,240 PPI |
Quick answers
Quick answers
- How many px/mm is 1 PPI?
- 1 PPI is 0.0393701 px/mm.
- How many px/mm is 10 PPI?
- 10 PPI is 0.393701 px/mm.
- How many px/mm is 460 PPI?
- 460 PPI is 18.1102 px/mm.
The units
About these units
Pixels per inch (PPI)
How screens are specified.
Pixels per millimeter (px/mm)
For microdisplays and sensors.
Keep going