Convert Twip to Kilometer
Convert twips to kilometers instantly. 1 twip = 1.763889e-8 kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilometer 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.
Kilometer
A kilometer is a metric unit of length equal to one thousand meters. It is the standard unit for measuring road distances, geographic distances, and other large-scale measurements in metric countries.
The kilometer was defined alongside the meter in 1795 using the standard SI prefix kilo- (from Greek chilioi, "thousand"), denoting one thousand units.
Kilometers are used worldwide (except the United States and a few others) for road signage, geographic distance, athletic events, and scientific distances at planetary scale. Speed limits in most countries are given in km/h.
Adopted 1795 in France as part of the original metric system; the kilometer became the global standard for road and geographic distance through the 19th and 20th century metric adoption.
Twip to Kilometer conversion formula
The relationship between twips and kilometers:
To convert twips to kilometers, multiply the value in twips by 1.763889e-8. To reverse, multiply kilometers by 5.669291e+7.
How to use this converter
Type a value into the calculator. The result in kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilometer to Twip converter for the reverse direction.
Step-by-step: convert twips to kilometers
- Write down the value in twips (twip).
- Multiply that value by the factor 1.763889e-8.
- The product is the equivalent value in kilometers (km).
- To reverse, multiply the kilometer value by 5.669291e+7.
Worked examples
Example 1 — Convert 1 twip to km:
1 × 1.763889e-8 = 1.763889e-8 km
Example 2 — Convert 100 twip to km:
100 × 1.763889e-8 = 1.763889e-6 km
Real-world example — Fiber-optic link lengths
Converting from microscale twips to the kilometers of a long-haul fiber link is the conversion an optical engineer performs when calculating attenuation per kilometre of fiber.
1e+9 twip × 1.763889e-8 = 17.6388888889 km
Real-world example — Feature-scale to long-haul
One billion twips equals exactly one kilometer — the conversion an optical-network engineer performs when totalling feature-level path lengths into a single long-haul fiber-link distance.
1e+9 twip × 1.763889e-8 = 17.6388888889 km
Twip to Kilometer conversion table
Standard reference values for converting twips to kilometers:
| Twip [twip] | Kilometer [km] |
|---|---|
| 0.01 | 1.763889e-10 |
| 0.1 | 1.763889e-9 |
| 1 | 1.763889e-8 |
| 2 | 3.527778e-8 |
| 3 | 5.291667e-8 |
| 4 | 7.055556e-8 |
| 5 | 8.819444e-8 |
| 10 | 1.763889e-7 |
| 20 | 3.527778e-7 |
| 30 | 5.291667e-7 |
| 40 | 7.055556e-7 |
| 50 | 8.819444e-7 |
| 100 | 1.763889e-6 |
| 500 | 8.819444e-6 |
| 1000 | 1.763889e-5 |
Frequently asked questions
How many kilometers is 1 twip?
How do I convert twips to kilometers?
How do I convert kilometers back to twips?
How many kilometers 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 = 1.763889e-8 km) 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.