One parsec is exactly 8.746802593e+19 points, so converting parsecs to points 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 distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years. The DTP point: exactly 1/72 inch, the unit type size is set in.
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". The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in points, so you can sanity-check whether your answer is a plausible size.
The formula
parsecs- The amount you are converting, in parsecs
8.74680259320e+19- The exact number of points in one parsec
points- The converted result
How it works, step by step
- Enter the value in parsecs.
- It is multiplied by 8.74680259320e+19, the exact factor between the two units.
- The answer is shown in points, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A larger figure: 100 pc in points
A larger figure comes to about 100 pc. Multiplying by the factor: 100 × 8.74680e+19 = 8.74680e+21 pt. Dividing the answer back by 8.74680e+19 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A round figure: 1 pc in points
At 1 pc (a round figure), the same quantity in points is 1 × 8.74680e+19 = 8.74680e+19 pt. One parsec is 8.74680e+19 points, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many points are in one parsec?
Exactly 8.74680259320e+19. 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 parsecs to points?
points = parsecs × 8.74680259320e+19. Reversed, parsecs = points ÷ 8.74680259320e+19, which is the same as multiplying by 1.14327491600e-20.
Which is the bigger unit, the parsec or the point?
The parsec. One parsec equals 8.74680e+19 points.
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 parsec?
The distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years.
What is a point?
The DTP point: exactly 1/72 inch, the unit type size is set in.
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.
Is there a quick way to do pc to pt in my head?
Plenty of people do this in their head: multiply by 9.0000e+19 instead of using the exact factor 8.7468e+19. At 100 that shortcut gives 9.0000e+21 points, off by 2.5320e+20 points or about 2.89%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Parsecs to points reference tables
| Parsecs | Points |
|---|---|
| 0.5 pc | 4.37340e+19 pt |
| 1 pc | 8.74680e+19 pt |
| 2 pc | 1.74936e+20 pt |
| 3 pc | 2.62404e+20 pt |
| 5 pc | 4.37340e+20 pt |
| 10 pc | 8.74680e+20 pt |
| 20 pc | 1.74936e+21 pt |
| 25 pc | 2.18670e+21 pt |
| 50 pc | 4.37340e+21 pt |
| 75 pc | 6.56010e+21 pt |
| 100 pc | 8.74680e+21 pt |
| 250 pc | 2.18670e+22 pt |
| 500 pc | 4.37340e+22 pt |
| 1000 pc | 8.74680e+22 pt |
| 5000 pc | 4.37340e+23 pt |
Exact factor: 1 parsec = 8.74680259320e+19 points.
| Quantity | pc | pt |
|---|---|---|
| A credit card’s long edge | 2.774e-18 pc | 242.6 pt |
| A door height | 6.585e-17 pc | 5760 pt |
| An Olympic pool | 1.620e-15 pc | 1.417e+05 pt |
| The Eiffel Tower | 1.069e-14 pc | 9.354e+05 pt |
| A marathon | 1.367e-12 pc | 1.196e+08 pt |
| Earth’s diameter | 4.129e-10 pc | 3.612e+10 pt |
Published reference values, converted with the same factor this page uses.