Convert Millimeter to Pica
Convert millimeters to picas instantly. 1 millimeter = 0.2362204743 pica — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pica to Millimeter converter for the reverse conversion.
Units explained
Millimeter
A millimeter is a metric unit of length equal to one thousandth of a meter (1/1000 m). It is the standard small-scale unit in the SI system and is widely used wherever sub-centimeter precision matters.
The millimeter was defined alongside the meter when France adopted the metric system in 1795, using the standard SI prefix milli- (from Latin mille, "thousand") to denote one-thousandth.
Millimeters are used in engineering drawings, machining, manufacturing, paper sizes, rainfall measurement, and any context where dimensions below one centimeter need to be specified clearly. Most rulers worldwide are marked in millimeters.
Adopted in 1795 in France as part of the original metric system; standardized internationally by the Metre Convention in 1875 and confirmed in the SI in 1960.
Pica
A pica is a typographic unit equal to exactly 12 points, or 1/6 inch (about 4.233 mm). It is used for measuring column widths and large typographic elements.
The PostScript pica of 12 points = 1/6 inch was standardised in 1984 alongside the PostScript point. Traditional pre-1984 picas varied slightly (e.g., the American pica was 0.166 inch, very close but not identical).
Picas are used for column widths in newspaper and magazine layout (typical column is 11–15 picas), line spacing in book design, and large typographic measurements. Mostly used by professional typesetters.
Modern PostScript pica defined in 1984 at 12 points = 1/6 inch; older typographic systems used slightly different pica values.
Millimeter to Pica conversion formula
The relationship between millimeters and picas:
To convert millimeters to picas, multiply the value in millimeters by 0.2362204743. To reverse, multiply picas by 4.2333333.
How to use this converter
Type a value into the calculator. The result in picas updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pica to Millimeter converter for the reverse direction.
Step-by-step: convert millimeters to picas
- Write down the value in millimeters (mm).
- Multiply that value by the factor 0.2362204743.
- The product is the equivalent value in picas (pc).
- To reverse, multiply the pica value by 4.2333333.
Worked examples
Example 1 — Convert 1 mm to pc:
1 × 0.2362204743 = 0.2362204743 pc
Example 2 — Convert 100 mm to pc:
100 × 0.2362204743 = 23.6220474301 pc
Real-world example — Postcard and small-object dimensions
A postcard is about 5 millimeters wide. Converting to picas is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 mm × 0.2362204743 = 1.1811023715 pc
Real-world example — Ruler-scale measurements
A 30-millimeter school ruler converts cleanly to picas — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 mm × 0.2362204743 = 7.086614229 pc
Real-world example — Hardware-scale dimensions
A 10-millimeter fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between millimeters and picas daily when mixing metric and imperial tools.
10 mm × 0.2362204743 = 2.362204743 pc
Millimeter to Pica conversion table
Standard reference values for converting millimeters to picas:
| Millimeter [mm] | Pica [pc] |
|---|---|
| 0.01 | 0.0023622047 |
| 0.1 | 0.0236220474 |
| 1 | 0.2362204743 |
| 2 | 0.4724409486 |
| 3 | 0.7086614229 |
| 4 | 0.9448818972 |
| 5 | 1.1811023715 |
| 10 | 2.362204743 |
| 20 | 4.724409486 |
| 30 | 7.086614229 |
| 40 | 9.448818972 |
| 50 | 11.811023715 |
| 100 | 23.6220474301 |
| 500 | 118.1102371505 |
| 1000 | 236.2204743009 |
Frequently asked questions
How many picas is 1 millimeter?
How do I convert millimeters to picas?
How do I convert picas back to millimeters?
How many picas is 100 millimeters?
Popular length unit conversions
Convert Millimeter to other length units
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Metric / SI (17 units)
Imperial / US Customary (27 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 mm = 0.2362204743 pc) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.