Picas to Millimeters Converter
Enter the typographical length in picas below to convert it to millimeters.
Convert Picas (pc) to Millimeters (mm)
Enter a value in picas (pc) (pc) to convert to millimeters (mm) (mm).
Pica to Millimeter Conversion Table
Table showing various pica measurements converted to millimeters. Click any preset value or arrow to load it into the converter.
| Picas (pc) (pc) | Millimeters (mm) (mm) |
|---|---|
| 1 pc | 4.2333333 mm |
| 2 pc | 8.4666667 mm |
| 2.5 pc | 10.5833333 mm |
| 5 pc | 21.1666667 mm |
| 10 pc | 42.3333333 mm |
| 15 pc | 63.5 mm |
| 20 pc | 84.6666667 mm |
| 25 pc | 105.8333333 mm |
| 30 pc | 127 mm |
| 50 pc | 211.6666667 mm |
How to Convert Picas to Millimeters
To convert picas to millimeters, multiply the typographical length by the following conversion ratio: 4.2333333 millimeters/pica.
Since one pica is equal to 4.2333333 millimeters, you can use this simple formula to convert:
The typographical length in millimeters is equal to the typographical length in picas multiplied by 4.2333333.
For example, here's how to convert 5 picas to millimeters using the formula above.
How Many Millimeters Are in a Pica?
There are 4.2333333 millimeters in a pica, which is why we use this value in the formula above.
Our pica to millimeter calculator automatically converts your typographical length measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Picas and millimeters are both units used to measure typographical length. Keep reading to learn more about each unit.
What Is a Pica?
A pica is a unit of typographical length equal to 12 points (pt), the base unit for typographical length. Typography pica equal to 12 points or 1/6 of an inch. [1]
The pica is classified as a standard unit of typographical length. Picas can be abbreviated as pc; for example, 1 pica can be written as 1 pc.
When working with picas (pc) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, picas (pc) 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 picas (pc) and millimeters (mm), keep full floating-point precision (1 pc = 4.2333333 mm; 1 mm = 0.2362205 pc) during intermediate calculations and round only the final millimeter figure to match your instrument tolerance.
More Pica & Millimeter Conversions
Need to calculate in the opposite direction? Use our millimeters (mm) to picas (pc) calculator to switch your starting unit immediately. You can also explore related tools such as converting millimeters (mm) to picas (pc), converting picas (pc) to points (pt), or converting points (pt) to picas (pc).
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Typography Metrology Standard — Picas (pc) (pc) to Millimeters (mm) (mm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Pica (PostScript) (pc) & Millimeter (Print) (mm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (pc to mm)