Popular conversions
Use the interactive converter to enter your own value and select any supported pair in this family.
Convert resolution notation such as pixels per inch and pixels per centimeter; use the unit that matches your workflow. Use the interactive converter to enter your own value and select any supported pair in this family.
Use the interactive converter to enter your own value and select any supported pair in this family.
Each row links to the live converter. The factor column uses the family’s stated base unit for linear families; for specialized reciprocal or numeral systems, use the live converter and the family-specific explanation.
| Source unit | Factor to base unit | Tool |
|---|---|---|
pixel per inchppi | 1 | Convert this unit ↗ |
dot per inchdpi | 1 | Convert this unit ↗ |
pixel per centimeterppcm | 2.54 | Convert this unit ↗ |
dot per millimeterdpmm | 25.4 | Convert this unit ↗ |
pixel per millimeterpx-mm | 25.4 | Convert this unit ↗ |
line per inchlpi | 1 | Convert this unit ↗ |
pixel per meterpx-m | 0.0254 | Convert this unit ↗ |
pixel per centimeterpx-cm | 2.54 | Convert this unit ↗ |
Unit standards, historical definitions and approximations can vary. Cooking volume-to-mass conversions depend on the ingredient; currencies require an exchange rate; sizing systems may be discrete; and logarithmic quantities such as decibels need purpose-built formulas rather than a linear scale.
For laboratory, medical, aviation, engineering or other safety-critical work, verify the definitions and standards that apply to your use case.