Convert Twip to Inch
Convert twips to inches instantly. 1 twip = 0.0006944444 inch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Inch to Twip converter for the reverse conversion.
Units explained
Twip
A twip is a typographic unit equal to 1/1440 of an inch (about 17.64 µm). It is used in legacy Microsoft Windows graphics APIs and PostScript typography.
The name twip is a contraction of 'twentieth of a point' (point being 1/72 inch). Adopted in Microsoft's GDI and OLE specifications for screen-resolution-independent measurement.
Twips appear in Visual Basic, legacy Windows API code, and some PostScript-derived typesetting systems. They allow whole-number arithmetic at sub-pixel precision for typographic layout.
Adopted by Microsoft in the 1980s for screen-typography APIs; remains in use in legacy Windows GDI and Visual Basic code.
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.
Twip to Inch conversion formula
The relationship between twips and inches:
To convert twips to inches, multiply the value in twips by 0.0006944444. To reverse, multiply inches by 1440.
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 Twip converter for the reverse direction.
Step-by-step: convert twips to inches
- Write down the value in twips (twip).
- Multiply that value by the factor 0.0006944444.
- The product is the equivalent value in inches (in).
- To reverse, multiply the inch value by 1440.
Worked examples
Example 1 — Convert 1 twip to in:
1 × 0.0006944444 = 0.0006944444 in
Example 2 — Convert 100 twip to in:
100 × 0.0006944444 = 0.0694444444 in
Real-world example — Packaging gauge
A 4-twip plastic bag thickness is a common spec for grocery and freezer bags. Converting from twips to inches is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 twip × 0.0006944444 = 0.0027777778 in
Real-world example — Plastic film and laminate thickness
A 500-twip 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 twip × 0.0006944444 = 0.3472222222 in
Twip to Inch conversion table
Standard reference values for converting twips to inches:
| Twip [twip] | Inch [in] |
|---|---|
| 0.01 | 6.944444e-6 |
| 0.1 | 6.944444e-5 |
| 1 | 0.0006944444 |
| 2 | 0.0013888889 |
| 3 | 0.0020833333 |
| 4 | 0.0027777778 |
| 5 | 0.0034722222 |
| 10 | 0.0069444444 |
| 20 | 0.0138888889 |
| 30 | 0.0208333333 |
| 40 | 0.0277777778 |
| 50 | 0.0347222222 |
| 100 | 0.0694444444 |
| 500 | 0.3472222222 |
| 1000 | 0.6944444444 |
Frequently asked questions
How many inches is 1 twip?
How do I convert twips to inches?
How do I convert inches back to twips?
How many inches is 100 twips?
Popular length unit conversions
Convert Twip to other length units
Show all Twip conversions
Metric / SI (4 units)
Imperial / US Customary (4 units)
Typographic (2 units)
Sources & references
Conversion factor (1 twip = 0.0006944444 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.