Convert Foot to Twip
Convert feet to twips instantly. 1 foot = 17279.9999999999 twip — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Twip to Foot converter for the reverse conversion.
Units explained
Foot
A foot is an Imperial and US customary unit of length equal to 12 inches or exactly 0.3048 meters. It is the most commonly used unit of length in everyday measurement in the United States.
The foot's origin is literally the length of a human foot, used as a measurement standard since antiquity. The English foot was standardized at various points in history; the modern international foot (0.3048 m exactly) was fixed by the 1959 International Yard and Pound Agreement.
Feet are used in the US for body height, building dimensions, room sizes, road sign clearances, aviation altitude (feet above sea level), and most everyday distance estimation. The UK uses feet informally for height despite officially being metric.
Used since antiquity; standardized to 0.3048 m exactly by the International Yard and Pound Agreement of 1959. Aviation worldwide uses feet for altitude despite metric adoption elsewhere.
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.
Foot to Twip conversion formula
The relationship between feet and twips:
To convert feet to twips, multiply the value in feet by 17279.9999999999. To reverse, multiply twips by 5.787037e-5.
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 Foot converter for the reverse direction.
Step-by-step: convert feet to twips
- Write down the value in feet (ft).
- Multiply that value by the factor 17279.9999999999.
- The product is the equivalent value in twips (twip).
- To reverse, multiply the twip value by 5.787037e-5.
Worked examples
Example 1 — Convert 1 ft to twip:
1 × 17279.9999999999 = 17279.9999999999 twip
Example 2 — Convert 100 ft to twip:
100 × 17279.9999999999 = 1727999.9999999891 twip
Real-world example — Macro-to-micro scale comparison
2 feet of measurement converts to a very large number in twips — useful in materials science when comparing bulk-sample dimensions to feature-level surface specs.
2 ft × 17279.9999999999 = 34559.9999999998 twip
Real-world example — Macroscopic to microscopic
One foot equals a million twips. Optical engineers calculating coherence length compare macro-scale path lengths with micro-scale wavelength differences using exactly this conversion.
1 ft × 17279.9999999999 = 17279.9999999999 twip
Real-world example — Sub-meter precision
A 0.001-foot (1 mm) tolerance equals 1,000 twips — useful for surface-finish specs, where macro-scale dimensions are given in the larger unit but feature roughness in the smaller.
0.001 ft × 17279.9999999999 = 17.28 twip
Foot to Twip conversion table
Standard reference values for converting feet to twips:
| Foot [ft] | Twip [twip] |
|---|---|
| 0.01 | 172.8 |
| 0.1 | 1728 |
| 1 | 17279.9999999999 |
| 2 | 34559.9999999998 |
| 3 | 51839.9999999997 |
| 4 | 69119.9999999996 |
| 5 | 86399.9999999994 |
| 10 | 172799.9999999989 |
| 20 | 345599.9999999978 |
| 30 | 518399.9999999967 |
| 40 | 691199.9999999956 |
| 50 | 863999.9999999945 |
| 100 | 1727999.9999999891 |
| 500 | 8639999.999999946 |
| 1000 | 1.728e+7 |
Frequently asked questions
How many twips is 1 foot?
How do I convert feet to twips?
How do I convert twips back to feet?
How many twips is 100 feet?
Popular length unit conversions
Convert Foot to other length units
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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 ft = 17279.9999999999 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 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.