This page converts points into nautical miles using the factor 1.904847612e-07, and shows the reverse figure alongside it. Both units measure length, which is why one number does the whole job.
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation. 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". The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in nautical miles, so you can sanity-check whether your answer is a plausible size.
The formula
points- The amount you are converting, in points
1.90484761219e-07- The exact number of nautical miles in one point
nautical miles- The converted result
How it works, step by step
- Enter the value in points.
- It is multiplied by 1.90484761219e-07, the exact factor between the two units.
- The answer is shown in nautical miles, 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 nautical miles
Take a door height, roughly 5760 pt. The conversion is a single multiplication — 5760 × 1.90485e-07 — giving 0.00109719 nmi. Because the relationship is proportional, doubling the input doubles the answer to 0.00219438 nmi.
A credit card’s long edge: 243 pt in nautical miles
A credit card’s long edge comes to about 243 pt. Multiplying by the factor: 243 × 1.90485e-07 = 4.62878e-05 nmi. Dividing the answer back by 1.90485e-07 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many nautical miles are in one point?
Exactly 1.90484761219e-07. 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 nautical miles?
nautical miles = points × 1.90484761219e-07. Reversed, points = nautical miles ÷ 1.90484761219e-07, which is the same as multiplying by 5,249,763.77953.
Which is the bigger unit, the point or the nautical mile?
The nautical mile. One point is only 1.90485e-07 of a nautical mile, so it takes 5.24976e+06 points to make one nautical mile.
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 nautical mile?
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
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 nmi in my head?
Plenty of people do this in their head: divide by 5200000.000000 instead of using the exact factor 0.000000. At 100 that shortcut gives 0.000019 nautical miles, off by 0.000000 nautical miles or about 0.96%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Points to nautical miles reference tables
| Points | Nautical Miles |
|---|---|
| 0.5 pt | 9.52424e-08 nmi |
| 1 pt | 1.90485e-07 nmi |
| 2 pt | 3.8097e-07 nmi |
| 3 pt | 5.71454e-07 nmi |
| 5 pt | 9.52424e-07 nmi |
| 10 pt | 1.90485e-06 nmi |
| 20 pt | 3.8097e-06 nmi |
| 25 pt | 4.76212e-06 nmi |
| 50 pt | 9.52424e-06 nmi |
| 75 pt | 1.42864e-05 nmi |
| 100 pt | 1.90485e-05 nmi |
| 250 pt | 4.76212e-05 nmi |
| 500 pt | 9.52424e-05 nmi |
| 1000 pt | 0.000190485 nmi |
| 5000 pt | 0.000952424 nmi |
Exact factor: 1 point = 1.90484761219e-07 nautical miles.
| Quantity | pt | nmi |
|---|---|---|
| A credit card’s long edge | 242.6 pt | 4.622e-05 nmi |
| A door height | 5760 pt | 0.001097 nmi |
| An Olympic pool | 1.417e+05 pt | 0.027 nmi |
| The Eiffel Tower | 9.354e+05 pt | 0.1782 nmi |
| A marathon | 1.196e+08 pt | 22.78 nmi |
| Earth’s diameter | 3.612e+10 pt | 6880 nmi |
Published reference values, converted with the same factor this page uses.