To convert points to mils, multiply by 13.88888889. 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 thousandth of an inch, the standard thickness unit for plastic film and PCB traces. 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". Below the calculator there is a step table for the values people look up most, and a second table putting real length figures into mils so the number you get has something to be compared against.
The formula
points- The amount you are converting, in points
13.8888888889- The exact number of mils in one point
mils- The converted result
How it works, step by step
- Enter the value in points.
- It is multiplied by 13.8888888889, the exact factor between the two units.
- The answer is shown in mils, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
The Eiffel Tower: 9.35e+05 pt in mils
At 9.35e+05 pt (the eiffel tower), the same quantity in mils is 9.35e+05 × 13.8889 = 1.29861e+07 mil. One point is 13.8889 mils, so the numbers grow as expected.
An Olympic pool: 1.42e+05 pt in mils
Take an olympic pool, roughly 1.42e+05 pt. The conversion is a single multiplication — 1.42e+05 × 13.8889 — giving 1.97222e+06 mil. Because the relationship is proportional, doubling the input doubles the answer to 3.94444e+06 mil.
How to read your score
Frequently asked questions
How many mils are in one point?
Exactly 13.8888888889. 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 mils?
mils = points × 13.8888888889. Reversed, points = mils ÷ 13.8888888889, which is the same as multiplying by 0.072.
Which is the bigger unit, the point or the mil?
The point. One point equals 13.8889 mils.
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 mil?
One thousandth of an inch, the standard thickness unit for plastic film and PCB traces.
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 mil in my head?
Plenty of people do this in their head: multiply by 14 instead of using the exact factor 13.88888889. At 100 that shortcut gives 1400 mils, off by 11.11 mils or about 0.80%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Points to mils reference tables
| Points | Mils |
|---|---|
| 0.5 pt | 6.94444 mil |
| 1 pt | 13.8889 mil |
| 2 pt | 27.7778 mil |
| 3 pt | 41.6667 mil |
| 5 pt | 69.4444 mil |
| 10 pt | 138.889 mil |
| 20 pt | 277.778 mil |
| 25 pt | 347.222 mil |
| 50 pt | 694.444 mil |
| 75 pt | 1041.67 mil |
| 100 pt | 1388.89 mil |
| 250 pt | 3472.22 mil |
| 500 pt | 6944.44 mil |
| 1000 pt | 13,888.9 mil |
| 5000 pt | 69,444.4 mil |
Exact factor: 1 point = 13.8888888889 mils.
| Quantity | pt | mil |
|---|---|---|
| A credit card’s long edge | 242.6 pt | 3370 mil |
| A door height | 5760 pt | 8e+04 mil |
| An Olympic pool | 1.417e+05 pt | 1.969e+06 mil |
| The Eiffel Tower | 9.354e+05 pt | 1.299e+07 mil |
| A marathon | 1.196e+08 pt | 1.661e+09 mil |
| Earth’s diameter | 3.612e+10 pt | 5.017e+11 mil |
Published reference values, converted with the same factor this page uses.