Points to Millimeters Converter
Enter the typographical length in points below to convert it to millimeters.
Convert Points (pt) to Millimeters (mm)
Enter a value in points (pt) (pt) to convert to millimeters (mm) (mm).
Point to Millimeter Conversion Table
Table showing various point measurements converted to millimeters. Click any preset value or arrow to load it into the converter.
| Points (pt) (pt) | Millimeters (mm) (mm) |
|---|---|
| 1 pt | 0.3527778 mm |
| 2 pt | 0.7055556 mm |
| 2.5 pt | 0.8819444 mm |
| 5 pt | 1.7638889 mm |
| 10 pt | 3.5277778 mm |
| 15 pt | 5.2916667 mm |
| 20 pt | 7.0555556 mm |
| 25 pt | 8.8194444 mm |
| 30 pt | 10.5833333 mm |
| 50 pt | 17.6388889 mm |
How to Convert Points to Millimeters
To convert points to millimeters, multiply the typographical length by the following conversion ratio: 0.3527778 millimeters/point.
Since one point is equal to 0.3527778 millimeters, you can use this simple formula to convert:
The typographical length in millimeters is equal to the typographical length in points multiplied by 0.3527778.
For example, here's how to convert 5 points to millimeters using the formula above.
How Many Millimeters Are in a Point?
There are 0.3527778 millimeters in a point, which is why we use this value in the formula above.
Our point to millimeter calculator automatically converts your typographical length measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Points and millimeters are both units used to measure typographical length. Keep reading to learn more about each unit.
What Is a Point?
Standard Desktop Publishing point equal to 1/72 of an international inch (0.352778 mm). It serves as a primary reference unit for measuring typographical length across scientific and practical applications. [1]
The point is classified as a standard unit of typographical length. Points can be abbreviated as pt; for example, 1 point can be written as 1 pt.
As the primary coherent reference unit for typographical length in this category, all other typographical length units are mathematically anchored to the point (pt).
In practice, points (pt) are widely used across standard typographical length applications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Millimeter?
A millimeter is a unit of typographical length equal to 2.8346457 points (pt), the base unit for typographical length. 1 mm = 2.83464567 DTP points. [2]
The millimeter is classified as a metric and SI-compatible unit of typographical length. Millimeters can be abbreviated as mm; for example, 1 millimeter can be written as 1 mm.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millimeter (mm) a convenient decimal multiple of the point (pt).
In practice, millimeters (mm) are widely used across standard typographical length applications within SI metric workflows, engineering documentation, and technical data sheets.
When converting typographical length between points (pt) and millimeters (mm), keep full floating-point precision (1 pt = 0.3527778 mm; 1 mm = 2.8346457 pt) during intermediate calculations and round only the final millimeter figure to match your instrument tolerance.
More Point & Millimeter Conversions
Need to calculate in the opposite direction? Use our millimeters (mm) to points (pt) calculator to switch your starting unit immediately. You can also explore related tools such as converting millimeters (mm) to points (pt), converting points (pt) to picas (pc), or converting points (pt) to pixels (px).
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Typography Metrology Standard — Points (pt) (pt) to Millimeters (mm) (mm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Point (DTP / PostScript) (pt) & Millimeter (Print) (mm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (pt to mm)