Case 1
- Value
- 1920
- From
- Pixels
- To
- Inches
- Resolution
- 96dpi
20.0000
Open with these valuesPixels to Inches Converter
20.0000
Result: 20.0000A pixel is not a length until you say at what resolution. The same 1920 pixels are 20 inches on a 96 dpi screen and 6.4 inches in a 300 dpi print. The other four units are fixed against each other and do not care about dpi.
Worked examples
Case 2
- Value
- 1920
- From
- Pixels
- To
- Inches
- Resolution
- 300dpi
6.4000
Open with these valuesCase 3
- Value
- 10
- From
- Centimetres
- To
- Pixels
- Resolution
- 96dpi
377.9528
Open with these valuesHow it's calculated
inches = px ÷ dpi; px = inches × dpi
- StepEnter the value and pick the unit it is in.
- StepPick the unit you want.
- StepSet the resolution — 96 dpi for screens, 300 for print.
- ResultRead the result.
Reference table
| Unit | Definition | Depends on dpi |
|---|---|---|
| px | 1 ÷ dpi inch | Yes |
| in | the reference unit | No |
| cm | 1 inch = 2.54 cm exactly | No |
| mm | 1 inch = 25.4 mm exactly | No |
| pt | 1 inch = 72 pt (DTP point) | No |
Questions
How many pixels are in an inch?
Whatever you set as the DPI. The web convention is 96, so one inch is 96 px and 1920 px is 20 inches.
How do I convert pixels to centimetres?
The calculator goes through inches: pixels divided by DPI, then times 2.54. At 96 DPI, 1920 px is 50.8 cm or 508 mm.
Which DPI should I enter?
96 for anything meant for the web, and the real density of the device or printer for anything physical. At 300 DPI the same 1920 px is 6.4 inches instead of 20.
Why does 96 DPI not match my monitor?
Because 96 is a CSS convention, not a measurement. Real monitors sit anywhere from about 80 to over 200 pixels per inch, and the browser scales rather than reporting the true density.
What is the difference between points and pixels?
A point is a 72nd of an inch by definition, so at 96 DPI one point is 1.333 px. 1920 px is 1440 pt.
Sources and last check
Information, not professional advice.