Convert Mile to Parsec
Convert miles to parsecs instantly. 1 mile = 5.215529e-14 parsec — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Parsec to Mile converter for the reverse conversion.
Units explained
Mile
A mile (statute mile) is an Imperial and US customary unit of length equal to 5,280 feet or exactly 1,609.344 meters. It is the standard unit for road distances in the United States and the United Kingdom.
The mile derives from the Roman mille passus ("thousand paces" — about 1,480 meters). The English statute mile was fixed at 5,280 feet by the Weights and Measures Act of 1593, and exactly defined as 1,609.344 m by the 1959 International Yard and Pound Agreement.
Miles are used in the US and UK for road signs, speed limits (mph), athletic events (one-mile run), and geographic distances. Aviation also uses statute miles for some visibility measurements.
Roman origin (mille passus); English statute mile fixed at 5,280 feet in 1593; standardized to 1,609.344 m exactly by the 1959 International Yard and Pound Agreement.
Parsec
A parsec (parallax-second) is a distance unit equal to 648,000/π astronomical units — approximately 3.086×10¹⁶ m (3.26 light years). It is the standard distance unit in professional astronomy.
Defined as the distance at which one astronomical unit subtends an angle of one arcsecond. IAU Resolution B2 in 2015 made this an exact definition: 1 pc = (648,000/π) AU.
Parsecs are used in professional astronomy for stellar distances (Proxima Centauri ≈ 1.3 pc), galactic-scale distances (with prefixes kiloparsec and megaparsec), and parallax measurements. Standard since the early 20th century.
Concept introduced by Herbert Hall Turner in 1913; exact definition via the AU adopted by IAU Resolution B2 in 2015.
Mile to Parsec conversion formula
The relationship between miles and parsecs:
To convert miles to parsecs, multiply the value in miles by 5.215529e-14. To reverse, multiply parsecs by 1.917351e+13.
How to use this converter
Type a value into the calculator. The result in parsecs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Parsec to Mile converter for the reverse direction.
Step-by-step: convert miles to parsecs
- Write down the value in miles (mi).
- Multiply that value by the factor 5.215529e-14.
- The product is the equivalent value in parsecs (pc).
- To reverse, multiply the parsec value by 1.917351e+13.
Worked examples
Example 1 — Convert 1 mi to pc:
1 × 5.215529e-14 = 5.215529e-14 pc
Example 2 — Convert 100 mi to pc:
100 × 5.215529e-14 = 5.215529e-12 pc
Real-world example — Coastal cruise distances
A 10-mile coastal sailing route converts to a different value in parsecs — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 mi × 5.215529e-14 = 5.215529e-13 pc
Real-world example — Road-sign distances across systems
A 100-mile road sign converts cleanly into parsecs — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 mi × 5.215529e-14 = 5.215529e-12 pc
Real-world example — Endurance race distances
A 50-mile cycling or running race converts to a recognizable distance in parsecs. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 mi × 5.215529e-14 = 2.607764e-12 pc
Mile to Parsec conversion table
Standard reference values for converting miles to parsecs:
| Mile [mi] | Parsec [pc] |
|---|---|
| 0.01 | 5.215529e-16 |
| 0.1 | 5.215529e-15 |
| 1 | 5.215529e-14 |
| 2 | 1.043106e-13 |
| 3 | 1.564659e-13 |
| 4 | 2.086211e-13 |
| 5 | 2.607764e-13 |
| 10 | 5.215529e-13 |
| 20 | 1.043106e-12 |
| 30 | 1.564659e-12 |
| 40 | 2.086211e-12 |
| 50 | 2.607764e-12 |
| 100 | 5.215529e-12 |
| 500 | 2.607764e-11 |
| 1000 | 5.215529e-11 |
Frequently asked questions
How many parsecs is 1 mile?
How do I convert miles to parsecs?
How do I convert parsecs back to miles?
How many parsecs is 100 miles?
Popular length unit conversions
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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 mi = 5.215529e-14 pc) 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.