Convert Inch to Point
Convert inches to points instantly. 1 inch = 71.9999954646 point — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Point to Inch converter for the reverse conversion.
Units explained
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
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 to Point conversion formula
The relationship between inches and points:
To convert inches to points, multiply the value in inches by 71.9999954646. To reverse, multiply points by 0.0138888898.
How to use this converter
Type a value into the calculator. The result in points updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Point to Inch converter for the reverse direction.
Step-by-step: convert inches to points
- Write down the value in inches (in).
- Multiply that value by the factor 71.9999954646.
- The product is the equivalent value in points (pt).
- To reverse, multiply the point value by 0.0138888898.
Worked examples
Example 1 — Convert 1 in to pt:
1 × 71.9999954646 = 71.9999954646 pt
Example 2 — Convert 100 in to pt:
100 × 71.9999954646 = 7199.9995464567 pt
Real-world example — Adjacent metric sub-units
One inch equals 1,000 points. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 in × 71.9999954646 = 71.9999954646 pt
Real-world example — Adjacent small-scale precision
One inch equals 1,000 points — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 in × 71.9999954646 = 71.9999954646 pt
Inch to Point conversion table
Standard reference values for converting inches to points:
| Inch [in] | Point [pt] |
|---|---|
| 0.01 | 0.7199999546 |
| 0.1 | 7.1999995465 |
| 1 | 71.9999954646 |
| 2 | 143.9999909291 |
| 3 | 215.9999863937 |
| 4 | 287.9999818583 |
| 5 | 359.9999773228 |
| 10 | 719.9999546457 |
| 20 | 1439.9999092913 |
| 30 | 2159.999863937 |
| 40 | 2879.9998185827 |
| 50 | 3599.9997732284 |
| 100 | 7199.9995464567 |
| 500 | 35999.9977322836 |
| 1000 | 71999.9954645672 |
Frequently asked questions
How many points is 1 inch?
How do I convert inches to points?
How do I convert points back to inches?
How many points is 100 inches?
Popular length unit conversions
Convert Inch to other length units
Show all Inch conversions
Metric / SI (18 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 in = 71.9999954646 pt) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.