One point is exactly 2.358173790e-15 astronomical units, so converting points to astronomical units 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.
Exactly 149,597,870,700 metres — the Earth–Sun distance, and the natural ruler for the solar system. 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". Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into astronomical units, which is usually more useful than the bare number.
The formula
points- The amount you are converting, in points
2.35817379036e-15- The exact number of astronomical units in one point
astronomical units- The converted result
How it works, step by step
- Enter the value in points.
- It is multiplied by 2.35817379036e-15, the exact factor between the two units.
- The answer is shown in astronomical units, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A credit card’s long edge: 243 pt in astronomical units
At 243 pt (a credit card’s long edge), the same quantity in astronomical units is 243 × 2.35817e-15 = 5.73036e-13 AU. One point is 2.35817e-15 astronomical units, so the numbers shrink as expected.
The Eiffel Tower: 9.35e+05 pt in astronomical units
At 9.35e+05 pt (the eiffel tower), the same quantity in astronomical units is 9.35e+05 × 2.35817e-15 = 2.20489e-09 AU. One point is 2.35817e-15 astronomical units, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many astronomical units are in one point?
Exactly 2.35817379036e-15. 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 points to astronomical units?
astronomical units = points × 2.35817379036e-15. Reversed, points = astronomical units ÷ 2.35817379036e-15, which is the same as multiplying by 4.24056956315e+14.
Which is the bigger unit, the point or the astronomical unit?
The astronomical unit. One point is only 2.35817e-15 of a astronomical unit, so it takes 4.24057e+14 points to make one astronomical unit.
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 point?
The DTP point: exactly 1/72 inch, the unit type size is set in.
What is a astronomical unit?
Exactly 149,597,870,700 metres — the Earth–Sun distance, and the natural ruler for the solar system.
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.
Points to astronomical units reference tables
| Points | Astronomical Units |
|---|---|
| 0.5 pt | 1.17909e-15 AU |
| 1 pt | 2.35817e-15 AU |
| 2 pt | 4.71635e-15 AU |
| 3 pt | 7.07452e-15 AU |
| 5 pt | 1.17909e-14 AU |
| 10 pt | 2.35817e-14 AU |
| 20 pt | 4.71635e-14 AU |
| 25 pt | 5.89543e-14 AU |
| 50 pt | 1.17909e-13 AU |
| 75 pt | 1.76863e-13 AU |
| 100 pt | 2.35817e-13 AU |
| 250 pt | 5.89543e-13 AU |
| 500 pt | 1.17909e-12 AU |
| 1000 pt | 2.35817e-12 AU |
| 5000 pt | 1.17909e-11 AU |
Exact factor: 1 point = 2.35817379036e-15 astronomical units.
| Quantity | pt | AU |
|---|---|---|
| A credit card’s long edge | 242.6 pt | 5.722e-13 AU |
| A door height | 5760 pt | 1.358e-11 AU |
| An Olympic pool | 1.417e+05 pt | 3.342e-10 AU |
| The Eiffel Tower | 9.354e+05 pt | 2.206e-09 AU |
| A marathon | 1.196e+08 pt | 2.821e-07 AU |
| Earth’s diameter | 3.612e+10 pt | 8.518e-05 AU |
Published reference values, converted with the same factor this page uses.