This converter turns mils into nautical miles instantly, using the exact factor 1 mil = 1.371490281e-08 nautical miles. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One thousandth of an inch, the standard thickness unit for plastic film and PCB traces. Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
mils- The amount you are converting, measured in mils
1.371490281e-08- The exact number of nautical miles in one mil
nautical miles- The converted result
How it works, step by step
- Enter the number of mils you want to convert.
- The value is multiplied by 1.371490281e-08, the exact conversion factor.
- The result is displayed in nautical miles, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 mils
Multiply 5 by 1.3714903e-08. That gives 6.8575e-08 nautical miles. A quick sanity check: one mil is smaller than one nautical mile, so the number should get smaller — and it does.
Converting 72 mils
72 × 1.3714903e-08 = 9.8747e-07 nautical miles. Working backwards, 9.8747e-07 ÷ 1.3714903e-08 returns 72 mils, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many nautical miles are in one mil?
Exactly 1.371490281e-08. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert mils to nautical miles?
Nautical Miles = mils × 1.371490281e-08. To reverse it, divide instead: mils = nautical miles ÷ 1.371490281e-08, which is the same as multiplying by 72913385.83.
Is the mil bigger than the nautical mile?
No. One mil is only 1.37149e-08 of a nautical mile, so the nautical mile is the larger unit.
Why does my answer differ slightly from other mils to nautical-miles converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a mil?
One thousandth of an inch, the standard thickness unit for plastic film and PCB traces.
What is a nautical mile?
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
Mils to nautical miles reference table
| Mils | Nautical Miles |
|---|---|
| 0.5 mil | 6.8575e-09 nmi |
| 1 mil | 1.3715e-08 nmi |
| 2 mil | 2.7430e-08 nmi |
| 3 mil | 4.1145e-08 nmi |
| 5 mil | 6.8575e-08 nmi |
| 10 mil | 1.3715e-07 nmi |
| 15 mil | 2.0572e-07 nmi |
| 20 mil | 2.7430e-07 nmi |
| 25 mil | 3.4287e-07 nmi |
| 50 mil | 6.8575e-07 nmi |
| 75 mil | 0.000001 nmi |
| 100 mil | 0.000001 nmi |
| 250 mil | 0.000003 nmi |
| 500 mil | 0.000007 nmi |
| 1000 mil | 0.000014 nmi |
Exact factor: 1 mil = 1.371490281e-08 nautical miles. Values rounded for display.