PT to CM Converter
| Points (pt) | Centimeters (cm) |
|---|
This PT to CM Converter is a fast, browser-based tool for converting typography points to centimeters and back.
Designers and typesetters constantly switch between unit systems. This tool makes that instant.
Features:
- Bidirectional conversion -- type in either field and the other updates automatically
- Common size presets -- one-click access to standard sizes from 6pt footnotes to 72pt display type
- Copy result -- grab the converted value with a single click
- Swap fields -- reverse the conversion direction instantly
- Clear button -- reset both fields at once
Works entirely in the browser. No installs, no sign-up, no server calls.
Precise to 6 decimal places. Useful for print design, CSS work, document layout, and anywhere point sizes need to translate to physical measurements.
How to Use This PT to CM Converter
Type a value in either field of the converter above. Enter points and the centimeter equivalent appears instantly; enter centimeters and it runs the other way. The Common Sizes table under the fields fills either input with one click.
Points (pt) are a print and typography unit. Centimeters belong to the metric system. They don't share a base unit, so a fixed formula is needed to move between them.
The two live in very different contexts. Font sizes, type specifications, and design software like Adobe Illustrator, InDesign, and Figma all work in points. Physical print dimensions, paper sizes, and real-world layout measurements are almost always in centimeters. Print designers convert between them constantly, especially when handing off files or setting document margins alongside type specs.
The PT to CM Conversion Formula
One point equals 0.0352778 cm. That's the entire formula:
cm = pt × 0.0352778
The number comes from the same chain the W3C uses to define CSS absolute length units: 1 inch equals 2.54 cm, 25.4 mm, 72 pt and 6 pc, all locked to each other. Divide 2.54 by 72 and you land on the multiplier every converter runs in the background.
That's the PostScript point standard, which is what CSS, Adobe software, and virtually every modern design tool uses.
Key figures:
- 1 pt = 0.0352778 cm
- 12 pt = 0.4233 cm
- 72 pt = 2.54 cm (exactly 1 inch)
- 1 cm = 28.3465 pt
Worked example: a 12 pt body text setting. Multiply 12 by 0.0352778 and the result lands at 0.4233 cm, the exact height that value occupies in print.
Adobe InDesign runs this same multiplication in the background whenever you type a value followed by cm into a measurement field.
This math assumes the DTP or PostScript point. Swap in a Didot point and every one of these numbers shifts, which is exactly why the point standards section further down exists.
CM to PT: The Reverse Formula
Going the other direction, multiply the centimeter figure by 28.3465, or divide it by 0.0352778:
pt = cm × 28.3465
- 1 cm → 28.35 pt
- 2.54 cm → 72 pt
- 0.5 cm → 14.17 pt
- 21 cm (A4 width) → 595.28 pt
Handy when a client hands you a spec sheet in metric and your software only shows points. Screen-first designers who start from pixels instead have a separate leg of the journey, covered by a dedicated px to pt converter.
PT to CM Conversion Table
Common point values and their centimeter equivalents, based on the PostScript point standard.
| Points (PT) | Centimeters (CM) |
|---|---|
| 1 pt | 0.035 cm |
| 2 pt | 0.071 cm |
| 3 pt | 0.106 cm |
| 4 pt | 0.141 cm |
| 5 pt | 0.176 cm |
| 6 pt | 0.212 cm |
| 7 pt | 0.247 cm |
| 8 pt | 0.282 cm |
| 9 pt | 0.317 cm |
| 10 pt | 0.353 cm |
| 11 pt | 0.388 cm |
| 12 pt | 0.423 cm |
| 14 pt | 0.494 cm |
| 15 pt | 0.529 cm |
| 16 pt | 0.565 cm |
| 18 pt | 0.635 cm |
| 20 pt | 0.706 cm |
| 24 pt | 0.847 cm |
| 25 pt | 0.882 cm |
| 30 pt | 1.058 cm |
| 35 pt | 1.235 cm |
| 36 pt | 1.270 cm |
| 40 pt | 1.411 cm |
| 45 pt | 1.587 cm |
| 48 pt | 1.693 cm |
| 50 pt | 1.764 cm |
| 60 pt | 2.117 cm |
| 70 pt | 2.469 cm |
| 72 pt | 2.540 cm |
| 80 pt | 2.822 cm |
| 90 pt | 3.175 cm |
| 100 pt | 3.528 cm |
72 pt equals exactly 1 inch, which equals 2.54 cm. That's the anchor value worth memorizing.
What Is a PT to CM Converter?
A PT to CM Converter is an online conversion tool that turns a typographic point value into its exact centimeter equivalent.
It exists because points and centimeters come from two different measurement worlds, one rooted in the printing press, the other in the metric system.
What the tool actually does:
- Accepts whole numbers, decimals, or a range of point values
- Applies a fixed multiplier tied to the 1/72 inch point standard
- Returns the centimeter equivalent, often alongside millimeters and inches
Most converters default to the DTP point, also called the PostScript point, unless you tell them otherwise.
That default matters more than it looks. Font sizes set in Microsoft Word, professional layout software, and stylesheets written in CSS all assume the same 1/72 inch base, so the converter's output lines up with what those tools already display on screen.
What Is a Point (Pt) in Typography and Printing?
A point is the base unit of typographic measurement, the number you see whenever you set a font size in InDesign, Word, or a browser.
Twelve points make one pica, a grouping that still shows up on InDesign rulers and in older print specs.
- Used for font size, line spacing, and rule weight
- Grouped into picas for column widths and page grids
- Not one fixed length until a specific standard gets attached to it
A 12 pt heading set in a French print shop and a 12 pt heading set in an American desktop publishing file are not physically the same size. That gap gets covered fully in the next section.
The 1/72 inch ratio most software uses today wasn't arbitrary. Apple's original Macintosh shipped with a 72 DPI screen, and Adobe's engineers matched the point to that resolution when they built PostScript.
How Do DTP, PostScript, and Didot Points Differ in CM?
The same "12 pt" label can describe three different physical sizes, depending on which point standard produced it.
| Standard | Definition | Value in cm | Primary use |
|---|---|---|---|
| PostScript / DTP | 1/72 inch | 0.03528 cm | Digital design, CSS, InDesign |
| Didot | 1/72 of a French royal inch | 0.0375 to 0.0376 cm | Continental European print |
| TeX point | 1/72.27 inch | 0.03515 cm | Academic and scientific typesetting |
The PostScript point is the one nearly every modern tool defaults to.
Adobe fixed it at exactly 1/72 inch when John Warnock and Charles Geschke built the PostScript language in the early 1980s, matching it to the 72 DPI Macintosh screen mentioned earlier.
The Didot point tells a different story. It measured roughly 0.0376 cm through most of its history. European phototypesetting standards then fixed it at exactly 0.0375 cm, or three eighths of a millimeter, in the 1970s.
French and other continental European print shops that still reference Didot points, or the related cicero unit, get a noticeably larger centimeter value from the same point count.
Donald Knuth added a third variant when he built the TeX typesetting system, defining his point at 1/72.27 inch rather than a clean 1/72.
- Slightly smaller than the PostScript point (0.03515 cm against 0.03528 cm)
- Still used in academic publishing pipelines built on TeX or LaTeX
- Rarely encountered outside scientific typesetting
Mixing these up produces a real error, not a rounding quirk. A document specified in Didot points and converted as if it were PostScript points comes out nearly 6% smaller than intended.
How Does Rounding Affect PT to CM Conversion Accuracy?
0.0352778 cm is already a rounded number. The true value repeats infinitely, so every converter rounds it somewhere.
The number of decimal places kept determines how much drift shows up once you multiply across a full page of type.
Common rounding approaches:
- 2 decimal places: fast, fine for a single font size, loses accuracy at scale
- 4 decimal places: the level most professional tools default to
- Round-half-up: the standard method, nudging a trailing 5 upward instead of down
Round to two decimals and 0.04 cm becomes the stand-in for a value that's actually 0.0353 cm, an error of more than 13% on a single point.
Run that error across 40 lines of body text stacked on a page and the layout drifts enough to throw off alignment on a print run built around tight margins.
PT to CM vs PT to MM vs PT to Inch: How Do They Compare?
All three conversions come from the same 1/72 inch point, so they never disagree with each other. They just serve different levels of precision.
| Point value | Centimeters | Millimeters | Inches |
|---|---|---|---|
| 12 pt | 0.4233 cm | 4.233 mm | 0.1667 in |
| 36 pt | 1.27 cm | 12.7 mm | 0.5 in |
| 72 pt | 2.54 cm | 25.4 mm | 1 in |
| 144 pt | 5.08 cm | 50.8 mm | 2 in |
Millimeters: best for fine tolerance work like packaging dielines or die-cut stickers, where half a centimeter is too coarse to be useful.
Centimeters: the default for general page layout, and the unit most European print shops quote back to clients.
Inches: still standard on US print specs. Knowing how many millimeters sit inside an inch makes it easy to sanity-check a converter's output by hand.
None of this starts from pixels. If your source values are in px rather than pt, a separate px to cm converter handles that conversion path on its own.
What Are Common PT to CM Conversions for Font Sizes?
These are the point sizes people actually type into a font-size field, pulled out of the full table above and rounded to four decimals.
Font size reference:
- 8 pt = 0.2822 cm
- 10 pt = 0.3528 cm
- 12 pt = 0.4233 cm
- 14 pt = 0.4939 cm
- 18 pt = 0.6350 cm
- 24 pt = 0.8467 cm
- 36 pt = 1.2700 cm
- 72 pt = 2.5400 cm
72 pt deserves a second look. It's the one value on this list that lands on a clean, round number, exactly one inch and exactly 2.54 cm, because the entire point system is built around that ratio.
Body copy usually sits between 10 pt and 12 pt, which explains why 0.35 cm to 0.42 cm shows up so often in print specs for books and reports.
Headlines and display type climb past 24 pt, territory where the centimeter difference between font sizes becomes visible to the eye and not just to a ruler.
Which Point Standard Should You Use for Print or Digital Design?
Default to the PostScript point for almost everything you build today.
It's what InDesign, Illustrator, Word, and CSS all assume unless someone tells them otherwise.
Academic publishers still hold onto point-based specs down to the decimal. Springer's own manuscript guidelines call for 10-point body type set with 12-point line spacing and a 3-pica top margin, inside a fixed 27 by 41 pica text frame.
PostScript / DTP point, pros:
- Matches every mainstream design and word processing tool by default
- Lines up exactly with CSS, so print and digital specs share one number
- Well documented, easy to convert with a simple 0.0352778 multiplier
PostScript / DTP point, cons:
- Wrong choice for legacy European files built on Didot measurements
- Meaningless once a project moves onto a pixel-based screen tool
Didot point, pros:
- Matches historical European type specimens and graphic charters
- Still expected by some French and Belgian print houses
Didot point, cons:
- Unsupported natively by most American-built software
- Produces a size mismatch if a file gets opened somewhere set to PostScript points
Pick Didot only when a client's spec sheet says so explicitly. Everyone else should stay on PostScript.
How Do You Convert PT to CM in InDesign, Word, and CSS?
Each tool gets you to a centimeter value differently, even though the math underneath never changes.
InDesign
InDesign defaults new print documents to picas, not centimeters, which catches a lot of first-time users off guard. Adobe documents the switch under Rulers and measurement units.
- Open Edit > Preferences > Units & Increments on Windows, or InDesign > Preferences > Units & Increments on Mac
- Set the Horizontal and Vertical Ruler Units to Centimeters
- Click OK, or right-click the ruler intersection for a faster one-off switch
You don't even need to open a menu for a single field. Type a value followed directly by "cm", such as 12cm, into any measurement box, and InDesign converts it on the spot.
One keyboard shortcut cycles through every unit at once: Cmd+Option+Shift+U on Mac, Ctrl+Alt+Shift+U on Windows.
Microsoft Word
Word keeps font size in points no matter what else you change. That field sits on the Home tab and never switches to centimeters.
What actually changes with the units setting: margins, indents, tab stops, and the ruler, not font size.
- Go to File, then Options, then Advanced
- Scroll to the Display section
- Choose Centimeters from the "Show measurements in units of" menu
Microsoft's own support documentation confirms this is the only path to change it, on both Windows and Mac.
CSS
Browsers render pt as a fixed absolute unit in stylesheets, tied to the same 1/72 inch base covered earlier in this article.
Skip the mental math and write the value in cm directly. These two declarations are equivalent:
font-size: 12pt;
font-size: 0.42cm;
Both resolve to the identical rendered size, since CSS treats pt and cm as two labels pointing at the same underlying length.
Screen rendering is where it gets messy. Browser engineers have warned against using pt for on-screen type for decades. It renders inconsistently across operating systems and only behaves predictably in print stylesheets.
What Common Mistakes Happen When Converting PT to CM?
16px equals 12pt, not 1pt, and that single mix-up causes more layout drift than any other error in this workflow, as Penn State's accessibility guidance on font sizing points out.
Treating a pixel and a point as interchangeable produces text that looks fine on screen and comes out the wrong size in print.
Where people go wrong:
- Assuming 1 pt equals 1 px, when the real ratio is 16px to 12pt
- Mixing Didot and PostScript values in the same document without labeling which one was used
- Rounding a multi-step calculation too early and compounding the error across a full page
- Confusing the point size of a font with the printed height of its characters
That last one trips up more people than it should. Point size describes the body a character sits on, not the ink height of the letters themselves, a distinction that goes back to metal type casting.
Small errors stack. A single 0.01 cm rounding slip on a font size looks harmless until it repeats across every heading, caption, and footnote in a long document.
When Does PT to CM Conversion Not Apply?
A point-to-centimeter formula only works when the source value is actually anchored to a physical length. Several common units aren't.
Pixels (px): not a fixed length at all. The W3C's own CSS specification defines a pixel as a reference angle, roughly 0.26 mm assuming a 96 dpi screen viewed at arm's length, not a guaranteed physical size.
Design tools built entirely around pixels make this obvious. Figma's own documentation shows every dimension and position field in pixels; the app has no point unit whatsoever.
Relative CSS units (em, rem, %): these scale against a parent element or the root font size instead of a physical measurement, so the same value produces a different size depending on context.
Understanding the gap between em and rem matters more here than any conversion formula does.
Screen-only design: a "72 pt" label in an app that never prints anything is a naming convention, not a physical dimension.
What actually determines how large that text looks is the device's own screen resolution, not the point count typed into a text box.
Unlabeled point standards: a value with no stated standard behind it, PostScript, Didot, or TeX, can't be converted reliably at all.
Ask which standard produced the number before running it through any formula.
FAQ on PT To CM Converter
How Many Centimeters Is 1 Point?
One PostScript point is 0.0352778 cm, or about 0.35 mm. The figure comes from 2.54 cm divided by the 72 points that make up one inch.
What Is 12pt in Centimeters?
12 pt equals 0.4233 cm, roughly 4.2 mm. That is also the size of one pica, which is why 12 pt body text and pica-based grids line up so neatly in print layouts.
What Is a Pica and How Does It Relate to Points?
A pica is a typographic unit equal to twelve points, about one-sixth of an inch. Newspapers, magazines, and grid-based layouts use it for column widths rather than font size.
In centimeters, one pica equals 0.4233 cm under the PostScript standard.
What Is a Centimeter in the Metric System?
A centimeter is one-hundredth of a meter, the International System of Units' base measurement of length. Rulers, page layouts, and print specifications use it worldwide outside the United States.
One centimeter equals 28.3465 points under the PostScript point standard.
Does Screen Resolution (DPI or PPI) Affect a PT to CM Conversion?
No. The point-to-centimeter formula stays fixed regardless of DPI or PPI, since it is based on a physical inch, not pixels.
Resolution only changes how many screen pixels render that centimeter value, not the conversion math itself.
What Should You Check Before Trusting a PT to CM Converter's Output?
A PT to CM Converter returns an accurate centimeter value only once two upstream questions get answered. Which point standard, PostScript, Didot, or TeX, produced the original number? And how many decimal places does the source file carry before rounding?
Verification follows a fixed order, not a preference.
- Confirm the point standard behind the number
- Check the decimal precision the tool displays
- Cross-check the result against a whole-unit reference before publishing
Combining the W3C's 1/72 inch point definition with the 16px-to-12pt browser ratio produces a conclusion neither figure states alone. A PT to CM Converter fed a pixel count instead of a point count overstates the centimeter result by a third.
Readers moving between screen assets and print dimensions typically move next to a px to inches converter to separate pixel-based screen sizing from the physical dimensions a print job requires.