Conversion Form

PT
CH

About the Unit

Point (pt): The point (pt) is a traditional typographic unit commonly used in print, and one of the standard measurement units in printed documents. 1pt is equal to 1/72 of an inch. Although pt is a physical unit and is not very common in digital design, it still has its use, especially when working with documents intended for print or when consistency is needed between digital and printed design. In CSS, using pt to define font size or other layout elements can be useful in print contexts, but its accuracy on digital screens may be affected by the screen's resolution. To ensure typography looks the same across devices, using relative units like em or rem may be more appropriate, but pt still has its place in document design, such as PDFs or other printed media formats.

Pro Tip: pt → ch

Use pt for fixed text size in print and ch for width relative to font's '0' character.

Quick Reference: Unit Conversion by Tens

PTCH
10pt26.6666ch
20pt53.3332ch
30pt79.9998ch
40pt106.6664ch
50pt133.333ch
60pt159.9996ch
70pt186.6662ch
80pt213.3328ch
90pt239.9994ch
100pt266.666ch
110pt293.3326ch
120pt319.9992ch
130pt346.6658ch
140pt373.3324ch
150pt399.999ch
160pt426.6656ch
170pt453.3322ch
180pt479.9988ch
190pt506.6654ch
200pt533.332ch
210pt559.9986ch
220pt586.6652ch
230pt613.3318ch
240pt639.9984ch
250pt666.665ch

Live Unit Preview

See how different CSS units affect the size of the box below:

10px

10rem

10em

10%

10vw

10vh

Common Mistake

Be cautious when mixing pt and ch without testing on different screen sizes.

Real Code Example

/* Mobile-first card with pt → ch */
.card {
  padding: 0pt;     /* undefinedch */
  font-size: 1.5rem;
  width: min(90vw, 40ch);
}
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  • Esc: Reset values

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