To convert nautical miles to points, multiply by 5,249,763.78. 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. Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
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 points so the number you get has something to be compared against.
The formula
nautical miles- The amount you are converting, in nautical miles
5,249,763.77953- The exact number of points in one nautical mile
points- The converted result
How it works, step by step
- Enter the value in nautical miles.
- It is multiplied by 5,249,763.77953, 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
An Olympic pool: 0.027 nmi in points
An Olympic pool comes to about 0.027 nmi. Multiplying by the factor: 0.027 × 5.24976e+06 = 141,744 pt. Dividing the answer back by 5.24976e+06 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A door height: 0.0011 nmi in points
At 0.0011 nmi (a door height), the same quantity in points is 0.0011 × 5.24976e+06 = 5774.74 pt. One nautical mile is 5.24976e+06 points, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many points are in one nautical mile?
Exactly 5,249,763.77953. 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 nautical miles to points?
points = nautical miles × 5,249,763.77953. Reversed, nautical miles = points ÷ 5,249,763.77953, which is the same as multiplying by 1.90484761219e-07.
Which is the bigger unit, the nautical mile or the point?
The nautical mile. One nautical mile equals 5.24976e+06 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 nautical mile?
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
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 nmi to pt in my head?
Plenty of people do this in their head: multiply by 5200000.000000 instead of using the exact factor 5,249,763.78. At 100 that shortcut gives 520000000.000000 points, off by 4976377.952756 points or about 0.95%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Nautical Miles to points reference tables
| Nautical Miles | Points |
|---|---|
| 0.5 nmi | 2.62488e+06 pt |
| 1 nmi | 5.24976e+06 pt |
| 2 nmi | 1.04995e+07 pt |
| 3 nmi | 1.57493e+07 pt |
| 5 nmi | 2.62488e+07 pt |
| 10 nmi | 5.24976e+07 pt |
| 20 nmi | 1.04995e+08 pt |
| 25 nmi | 1.31244e+08 pt |
| 50 nmi | 2.62488e+08 pt |
| 75 nmi | 3.93732e+08 pt |
| 100 nmi | 5.24976e+08 pt |
| 250 nmi | 1.31244e+09 pt |
| 500 nmi | 2.62488e+09 pt |
| 1000 nmi | 5.24976e+09 pt |
| 5000 nmi | 2.62488e+10 pt |
Exact factor: 1 nautical mile = 5,249,763.77953 points.
| Quantity | nmi | pt |
|---|---|---|
| A credit card’s long edge | 4.622e-05 nmi | 242.6 pt |
| A door height | 0.001097 nmi | 5760 pt |
| An Olympic pool | 0.027 nmi | 1.417e+05 pt |
| The Eiffel Tower | 0.1782 nmi | 9.354e+05 pt |
| A marathon | 22.78 nmi | 1.196e+08 pt |
| Earth’s diameter | 6880 nmi | 3.612e+10 pt |
Published reference values, converted with the same factor this page uses.