Convert Millimeter to Twip
Convert millimeters to twips instantly. 1 millimeter = 56.6929133858 twip — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Twip 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.
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.
Millimeter to Twip conversion formula
The relationship between millimeters and twips:
To convert millimeters to twips, multiply the value in millimeters by 56.6929133858. To reverse, multiply twips by 0.0176388889.
How to use this converter
Type a value into the calculator. The result in twips updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Twip to Millimeter converter for the reverse direction.
Step-by-step: convert millimeters to twips
- Write down the value in millimeters (mm).
- Multiply that value by the factor 56.6929133858.
- The product is the equivalent value in twips (twip).
- To reverse, multiply the twip value by 0.0176388889.
Worked examples
Example 1 — Convert 1 mm to twip:
1 × 56.6929133858 = 56.6929133858 twip
Example 2 — Convert 100 mm to twip:
100 × 56.6929133858 = 5669.2913385826 twip
Real-world example — Adjacent small-scale precision
One millimeter equals 1,000 twips — 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 mm × 56.6929133858 = 56.6929133858 twip
Real-world example — Adjacent metric sub-units
One millimeter equals 1,000 twips. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 mm × 56.6929133858 = 56.6929133858 twip
Millimeter to Twip conversion table
Standard reference values for converting millimeters to twips:
| Millimeter [mm] | Twip [twip] |
|---|---|
| 0.01 | 0.5669291339 |
| 0.1 | 5.6692913386 |
| 1 | 56.6929133858 |
| 2 | 113.3858267717 |
| 3 | 170.0787401575 |
| 4 | 226.7716535433 |
| 5 | 283.4645669291 |
| 10 | 566.9291338583 |
| 20 | 1133.8582677165 |
| 30 | 1700.7874015748 |
| 40 | 2267.7165354331 |
| 50 | 2834.6456692913 |
| 100 | 5669.2913385826 |
| 500 | 28346.4566929132 |
| 1000 | 56692.9133858264 |
Frequently asked questions
How many twips is 1 millimeter?
How do I convert millimeters to twips?
How do I convert twips back to millimeters?
How many twips is 100 millimeters?
Popular length unit conversions
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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 = 56.6929133858 twip) 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.