To convert points to nanometers, multiply by 352,777.7778. That factor is the whole relationship: both units measure length, so the conversion is a proportion with no offset and no substance-specific constant.
The DTP point: exactly 1/72 inch, the unit type size is set in. One billionth of a metre — the scale of light wavelengths and chip lithography.
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 nanometers, so you can sanity-check whether your answer is a plausible size.
The formula
points- The amount you are converting, in points
352,777.777778- The exact number of nanometers in one point
nanometers- The converted result
How it works, step by step
- Enter the value in points.
- It is multiplied by 352,777.777778, the exact factor between the two units.
- The answer is shown in nanometers, 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 nanometers
Take a door height, roughly 5760 pt. The conversion is a single multiplication — 5760 × 352,778 — giving 2.032e+09 nm. Because the relationship is proportional, doubling the input doubles the answer to 4.064e+09 nm.
The Eiffel Tower: 9.35e+05 pt in nanometers
Take the eiffel tower, roughly 9.35e+05 pt. The conversion is a single multiplication — 9.35e+05 × 352,778 — giving 3.29847e+11 nm. Because the relationship is proportional, doubling the input doubles the answer to 6.59694e+11 nm.
How to read your score
Frequently asked questions
How many nanometers are in one point?
Exactly 352,777.777778. 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 nanometers?
nanometers = points × 352,777.777778. Reversed, points = nanometers ÷ 352,777.777778, which is the same as multiplying by 2.83464566929e-06.
Which is the bigger unit, the point or the nanometer?
The point. One point equals 352,778 nanometers.
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 nanometer?
One billionth of a metre — the scale of light wavelengths and chip lithography.
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 nm in my head?
Plenty of people do this in their head: multiply by 350,000 instead of using the exact factor 352,777.7778. At 100 that shortcut gives 35,000,000 nanometers, off by 277777.777778 nanometers or about 0.79%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Points to nanometers reference tables
| Points | Nanometers |
|---|---|
| 0.5 pt | 176,389 nm |
| 1 pt | 352,778 nm |
| 2 pt | 705,556 nm |
| 3 pt | 1.05833e+06 nm |
| 5 pt | 1.76389e+06 nm |
| 10 pt | 3.52778e+06 nm |
| 20 pt | 7.05556e+06 nm |
| 25 pt | 8.81944e+06 nm |
| 50 pt | 1.76389e+07 nm |
| 75 pt | 2.64583e+07 nm |
| 100 pt | 3.52778e+07 nm |
| 250 pt | 8.81944e+07 nm |
| 500 pt | 1.76389e+08 nm |
| 1000 pt | 3.52778e+08 nm |
| 5000 pt | 1.76389e+09 nm |
Exact factor: 1 point = 352,777.777778 nanometers.
| Quantity | pt | nm |
|---|---|---|
| A credit card’s long edge | 242.6 pt | 8.56e+07 nm |
| A door height | 5760 pt | 2.032e+09 nm |
| An Olympic pool | 1.417e+05 pt | 5e+10 nm |
| The Eiffel Tower | 9.354e+05 pt | 3.3e+11 nm |
| A marathon | 1.196e+08 pt | 4.22e+13 nm |
| Earth’s diameter | 3.612e+10 pt | 1.274e+16 nm |
Published reference values, converted with the same factor this page uses.