To convert points to angstroms, multiply by 3,527,777.778. That factor is the whole relationship: both units measure length, so the conversion is a proportion with no offset and no substance-specific constant.
One ten-billionth of a metre, sized to atoms: a carbon–carbon bond is about 1.5 Å. 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 angstroms, which is usually more useful than the bare number.
The formula
points- The amount you are converting, in points
3,527,777.77778- The exact number of angstroms in one point
angstroms- The converted result
How it works, step by step
- Enter the value in points.
- It is multiplied by 3,527,777.77778, the exact factor between the two units.
- The answer is shown in angstroms, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A door height: 5760 pt in angstroms
Take a door height, roughly 5760 pt. The conversion is a single multiplication — 5760 × 3.52778e+06 — giving 2.032e+10 Å. Because the relationship is proportional, doubling the input doubles the answer to 4.064e+10 Å.
A credit card’s long edge: 243 pt in angstroms
Take a credit card’s long edge, roughly 243 pt. The conversion is a single multiplication — 243 × 3.52778e+06 — giving 8.5725e+08 Å. Because the relationship is proportional, doubling the input doubles the answer to 1.7145e+09 Å.
How to read your score
Frequently asked questions
How many angstroms are in one point?
Exactly 3,527,777.77778. 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 angstroms?
angstroms = points × 3,527,777.77778. Reversed, points = angstroms ÷ 3,527,777.77778, which is the same as multiplying by 2.83464566929e-07.
Which is the bigger unit, the point or the angstrom?
The point. One point equals 3.52778e+06 angstroms.
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 angstrom?
One ten-billionth of a metre, sized to atoms: a carbon–carbon bond is about 1.5 Å.
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 pt to Å in my head?
Plenty of people do this in their head: multiply by 3500000.000000 instead of using the exact factor 3,527,777.778. At 100 that shortcut gives 350000000.000000 angstroms, off by 2777777.777778 angstroms or about 0.79%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Points to angstroms reference tables
| Points | Angstroms |
|---|---|
| 0.5 pt | 1.76389e+06 Å |
| 1 pt | 3.52778e+06 Å |
| 2 pt | 7.05556e+06 Å |
| 3 pt | 1.05833e+07 Å |
| 5 pt | 1.76389e+07 Å |
| 10 pt | 3.52778e+07 Å |
| 20 pt | 7.05556e+07 Å |
| 25 pt | 8.81944e+07 Å |
| 50 pt | 1.76389e+08 Å |
| 75 pt | 2.64583e+08 Å |
| 100 pt | 3.52778e+08 Å |
| 250 pt | 8.81944e+08 Å |
| 500 pt | 1.76389e+09 Å |
| 1000 pt | 3.52778e+09 Å |
| 5000 pt | 1.76389e+10 Å |
Exact factor: 1 point = 3,527,777.77778 angstroms.
| Quantity | pt | Å |
|---|---|---|
| A credit card’s long edge | 242.6 pt | 8.56e+08 Å |
| A door height | 5760 pt | 2.032e+10 Å |
| An Olympic pool | 1.417e+05 pt | 5e+11 Å |
| The Eiffel Tower | 9.354e+05 pt | 3.3e+12 Å |
| A marathon | 1.196e+08 pt | 4.22e+14 Å |
| Earth’s diameter | 3.612e+10 pt | 1.274e+17 Å |
Published reference values, converted with the same factor this page uses.