Didot Point to Point Converter
Dec lared traditional French Didot point .3759715104 mmto Post Script 25.4/72 mm point, not assume both point names are equal. Explicit caller font/layout/reference context; not a shaping engine, actual page layout or accessibility certification.
Description
Traditional French Didot points and PostScript points are different physical units.
Traditional French Didot points and PostScript points are different physical units.1
A declared millimetre definition makes the conversion reproducible.
When to use Didot Point to Point Converter
Use this tool when you need to reproduce the stated calculation from measured records or independently selected model inputs. Establish the font version, feature, layout, physical or CSS units, and matched reference basis needed for this calculation.
How to use Didot Point to Point Converter and understand its results
- Establish the font version, feature, layout, physical or CSS units, and matched reference basis needed for this calculation.
- Enter traditionalDidotPoints, following the field table and rules below, then run the tool.
- Read postscriptPoints. Use the output meanings below to interpret units, signs, flags, and any nested result fields.
- Correct reported input issues and run again. For a successful result, check the stated evidence coverage and assumptions before using it in your review.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| traditionalDidotPoints | Traditional didot points | number | Required |
Enter a nonnegative Didot point count. The implementation uses 0.3759715104 millimetres per Didot point and 25.4/72 millimetres per PostScript point. Multiply by the fixed factor; alternate historical point definitions are outside this conversion.
PostScriptPoints=DidotPoints×1.0657460137322834 Symbols follow the input and output meanings and the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| postscriptPoints | Postscript points | number |
{
"input": {
"traditionalDidotPoints": 2
},
"output": {
"postscriptPoints": 2.131492027464567
}
}Limitations and assumptions
The calculation uses declared units and font or layout assumptions. It does not shape glyphs, lay out actual pages, or certify accessibility or print quality.
Missing required fields, unknown fields, wrong types, and violated calculation rules are input issues. Numeric values must be finite; nonfinite results are rejected.
Alternative or Complementary methods
For a related review, use Cicero to Pica (French) Converter: A traditional French cicero contains twelve Didot points, while a PostScript pica contains twelve PostScript points. Their physical definitions determine the conversion. For a complementary step, use Apparent Size at Viewing Distance Points: Apparent printed-letter size is an angle determined by measured ink height and viewing distance. Font point size alone may differ from the actual letter ink height.
References
-
Didot Point to Point Converter — tool.io
Similar or alternative tools
- Cicero to Pica (French) Converter
A traditional French cicero contains twelve Didot points, while a PostScript pica contains twelve PostScript points. Their physical definitions determine the conversion.
- Apparent Size at Viewing Distance Points
Apparent printed-letter size is an angle determined by measured ink height and viewing distance. Font point size alone may differ from the actual letter ink height.