Convert Point to Inch
Convert points to inches instantly. 1 point = 0.0138888898 inch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Inch to Point converter for the reverse conversion.
Units explained
Point
A point is a typographic unit equal to 1/72 of an inch (about 0.353 mm) in the PostScript point system. It is the standard unit for font sizes and typographic measurements in modern digital publishing.
The PostScript/Adobe point of exactly 1/72 inch was adopted in 1984 with the release of PostScript. This replaced earlier, slightly different typographic points (Didot, Truchet, Pica points) that had varied across regional printing traditions.
Points are used throughout typesetting, word processing, and design software for font sizes (typical body text is 10–12 pt) and small typographic dimensions. The web's standard typography unit, even when expressed in CSS as 1pt = 1.333px.
PostScript point of 1/72 inch defined by Adobe in 1984; predecessors include the Didot point (France, ~0.376 mm) and the Truchet/Pica systems.
Inch
An inch is an Imperial and US customary unit of length defined since 1959 as exactly 25.4 millimeters (0.0254 meters). It is still the standard small unit of length in the United States, the United Kingdom (informally), and a few other countries.
The inch derives from the Roman uncia (one-twelfth of a foot) and survived through Anglo-Saxon and medieval English measurement systems. Various definitions persisted regionally until the 1959 International Yard and Pound Agreement standardized the inch globally as exactly 25.4 mm.
Inches are used in the US and UK for body height, screen sizes (TVs, monitors, phones), tire sizes, plumbing, lumber, paper sizes (US Letter is 8.5 × 11 in), and most consumer product specifications in the United States.
Anglo-Saxon origin (predating 1066); standardized to 25.4 mm exactly by the International Yard and Pound Agreement of 1959, signed by the US, UK, Canada, Australia, New Zealand, and South Africa.
Point to Inch conversion formula
The relationship between points and inches:
To convert points to inches, multiply the value in points by 0.0138888898. To reverse, multiply inches by 71.9999954646.
How to use this converter
Type a value into the calculator. The result in inches updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Inch to Point converter for the reverse direction.
Step-by-step: convert points to inches
- Write down the value in points (pt).
- Multiply that value by the factor 0.0138888898.
- The product is the equivalent value in inches (in).
- To reverse, multiply the inch value by 71.9999954646.
Worked examples
Example 1 — Convert 1 pt to in:
1 × 0.0138888898 = 0.0138888898 in
Example 2 — Convert 100 pt to in:
100 × 0.0138888898 = 1.3888889764 in
Real-world example — Packaging gauge
A 4-point plastic bag thickness is a common spec for grocery and freezer bags. Converting from points to inches is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 pt × 0.0138888898 = 0.0555555591 in
Real-world example — Plastic film and laminate thickness
A 500-point sheet is a typical spec for ID-card laminates and film overlays. Converting to inches aligns the value with the unit most CAD systems and material datasheets prefer.
500 pt × 0.0138888898 = 6.9444448819 in
Point to Inch conversion table
Standard reference values for converting points to inches:
| Point [pt] | Inch [in] |
|---|---|
| 0.01 | 0.0001388889 |
| 0.1 | 0.001388889 |
| 1 | 0.0138888898 |
| 2 | 0.0277777795 |
| 3 | 0.0416666693 |
| 4 | 0.0555555591 |
| 5 | 0.0694444488 |
| 10 | 0.1388888976 |
| 20 | 0.2777777953 |
| 30 | 0.4166666929 |
| 40 | 0.5555555906 |
| 50 | 0.6944444882 |
| 100 | 1.3888889764 |
| 500 | 6.9444448819 |
| 1000 | 13.8888897638 |
Frequently asked questions
How many inches is 1 point?
How do I convert points to inches?
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How many inches is 100 points?
Popular length unit conversions
Convert Point to other length units
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Metric / SI (4 units)
Imperial / US Customary (4 units)
Typographic (2 units)
Sources & references
Conversion factor (1 pt = 0.0138888898 in) 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.