Points to Millimeters Converter
Enter the length in points below to convert it to millimeters.
Convert Points to Millimeters
Enter a value in points (pt) to convert to millimeters (mm).
Points to Millimeters Conversion Chart (1–40 Continuous)
Continuous 1 to 40 points lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Points (pt) | Decimal (mm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 pt★ Common | 0.352778 mm | 23/64 mm | 3/8 mm |
2 pt★ Common | 0.705556 mm | 45/64 mm | 11/16 mm |
3 pt★ Common | 1.058333 mm | 1 1/16 mm | 1 1/16 mm |
4 pt | 1.411111 mm | 1 13/32 mm | 1 7/16 mm |
5 pt★ Common | 1.763889 mm | 1 49/64 mm | 1 3/4 mm |
6 pt★ Common | 2.116667 mm | 2 7/64 mm | 2 1/8 mm |
7 pt | 2.469444 mm | 2 15/32 mm | 2 1/2 mm |
8 pt★ Common | 2.822222 mm | 2 53/64 mm | 2 13/16 mm |
9 pt | 3.175 mm | 3 11/64 mm | 3 3/16 mm |
10 pt★ Common | 3.527778 mm | 3 17/32 mm | 3 1/2 mm |
11 pt | 3.880556 mm | 3 7/8 mm | 3 7/8 mm |
12 pt★ Common | 4.233333 mm | 4 15/64 mm | 4 1/4 mm |
How to Convert Points to Millimeters
To convert points to millimeters, multiply the 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 length in millimeters is equal to the 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 fraction and decimal calculator can convert points and millimeters, and it automatically converts the results to US customary, imperial, and SI metric values.
Points and millimeters are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Points to Fractional Inches (1/16″, 1/32″ & 1/64″)
Plain-language method for turning decimal inches into a standard tape-measure or machinist ruler fraction
Calculators give you a decimal number (such as 0.069444 in), but tape measures and woodworking rulers are marked in binary fractions of an inch—most commonly 1/16″ on carpenter tapes, 1/32″ on fine woodworking rules, and 1/64″ on machinist scales.
Here is the step-by-step worked example for converting 5 points (pt) into fractional inches:
- Find the decimal inches result: Convert 5 pt to inches to get 0.069444 in.
- Separate the whole inches from the decimal part: Keep the whole number 0 aside, leaving the decimal remainder 0.069444.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0.069444 by 16, 32, or 64, then round to the nearest whole number (values ending in .5 round up).
- Reduce the fraction to lowest terms: If the rounded top number (numerator) is even, divide both top and bottom by 2 (or their Greatest Common Divisor) until the top number is odd, then combine with your whole inches.
What Is a Point?
A point is a unit of length equal to 0.000352778 meters (m), the base unit for length. Desktop publishing point equal to 1/72 of an international inch (0.35278 mm). [1]
The point is classified as a standard unit of length. Points can be abbreviated as pt; for example, 1 point can be written as 1 pt.
When working with points (pt) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, points (pt) are widely used across fine-tolerance laboratory, analytical, and micro-scale length measurements within international standard workflows, engineering documentation, and technical data sheets.
What Is a Millimeter?
A millimeter is a metric unit of length equal to one-thousandth (1/1,000) of a meter or one-tenth (1/10) of a centimeter. By international definition, there are exactly 25.4 millimeters in one inch. [2]
The millimeter, or millimetre, is a standard SI metric unit of length. Millimeters can be abbreviated as mm; for example, 1 millimeter can be written as 1 mm.
In the metric system, "milli" is the prefix for thousandths, or 10⁻³. Millimeters are the default unit on mechanical engineering drawings and architectural blueprints worldwide.
Millimeters are commonly measured using metric steel rules, digital vernier calipers, depth gauges, and micrometers in CNC machining, 3D printing, automotive fasteners, and precision manufacturing.
When converting 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 to points calculator to switch your starting unit immediately. You can also explore related tools such as converting millimeters to points, converting inches to millimeters, or converting micrometers to millimeters.
Convert from Points
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Points (pt) to Millimeters (mm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Point (Typography) (pt) & Millimeter (mm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (pt to mm)