One mile is exactly 5.215528705e-14 parsecs, so converting miles to parsecs is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
The statute mile: 5,280 feet, used for road distance in the US, UK and a handful of others. The distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years.
The mil and the millimetre are not the same thing and are out by a factor of about forty. A mil is one thousandth of an inch — 0.0254 mm — and a spec sheet that quotes film thickness in mils means the small unit. British drawings write the same size as "thou". Below the calculator there is a step table for the values people look up most, and a second table putting real length figures into parsecs so the number you get has something to be compared against.
The formula
miles- The amount you are converting, in miles
5.21552870479e-14- The exact number of parsecs in one mile
parsecs- The converted result
How it works, step by step
- Enter the value in miles.
- It is multiplied by 5.21552870479e-14, the exact factor between the two units.
- The answer is shown in parsecs, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
The Eiffel Tower: 0.205 mi in parsecs
The Eiffel Tower comes to about 0.205 mi. Multiplying by the factor: 0.205 × 5.21553e-14 = 1.06918e-14 pc. Dividing the answer back by 5.21553e-14 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A marathon: 26.2 mi in parsecs
A marathon comes to about 26.2 mi. Multiplying by the factor: 26.2 × 5.21553e-14 = 1.36647e-12 pc. Dividing the answer back by 5.21553e-14 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many parsecs are in one mile?
Exactly 5.21552870479e-14. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert miles to parsecs?
parsecs = miles × 5.21552870479e-14. Reversed, miles = parsecs ÷ 5.21552870479e-14, which is the same as multiplying by 1.91735115767e+13.
Which is the bigger unit, the mile or the parsec?
The parsec. One mile is only 5.21553e-14 of a parsec, so it takes 1.91735e+13 miles to make one parsec.
What does this quantity actually measure?
Both units measure length. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a mile?
The statute mile: 5,280 feet, used for road distance in the US, UK and a handful of others.
What is a parsec?
The distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Miles to parsecs reference tables
| Miles | Parsecs |
|---|---|
| 0.5 mi | 2.60776e-14 pc |
| 1 mi | 5.21553e-14 pc |
| 2 mi | 1.04311e-13 pc |
| 3 mi | 1.56466e-13 pc |
| 5 mi | 2.60776e-13 pc |
| 10 mi | 5.21553e-13 pc |
| 20 mi | 1.04311e-12 pc |
| 25 mi | 1.30388e-12 pc |
| 50 mi | 2.60776e-12 pc |
| 75 mi | 3.91165e-12 pc |
| 100 mi | 5.21553e-12 pc |
| 250 mi | 1.30388e-11 pc |
| 500 mi | 2.60776e-11 pc |
| 1000 mi | 5.21553e-11 pc |
| 5000 mi | 2.60776e-10 pc |
Exact factor: 1 mile = 5.21552870479e-14 parsecs.
| Quantity | mi | pc |
|---|---|---|
| A credit card’s long edge | 5.319e-05 mi | 2.774e-18 pc |
| A door height | 0.001263 mi | 6.585e-17 pc |
| An Olympic pool | 0.03107 mi | 1.620e-15 pc |
| The Eiffel Tower | 0.2051 mi | 1.069e-14 pc |
| A marathon | 26.22 mi | 1.367e-12 pc |
| Earth’s diameter | 7918 mi | 4.129e-10 pc |
Published reference values, converted with the same factor this page uses.