Convert Millimeters to Nautical miles
1 millimeter is 5.40e-7 nmi. One millimeter is exactly 5.39956803456e-7 nautical miles.
One millimeter is 5.3996 × 10^-7 nautical miles. To convert millimeters to nautical miles, multiply by 5.3996 × 10^-7; to go the other way, divide by 5.3996 × 10^-7 or multiply by 1852000. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST. One thousandth of a meter.
Factor checked against the defining standard · How we check
- Millimeters × 5.3996 × 10^-7
1 * 0.00000050 nmi
1 millimeter in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 0.03937007874 in | × 0.0393700787402 |
| feet | 0.003280839895 ft | × 0.00328083989501 |
| yards | 0.001093613298 yd | × 0.00109361329834 |
| miles | 0.0000006213711922 mi | × 0.000000621371192237 |
| millimeters (as entered) | 1 mm | — |
| decimetres | 0.01 dm | × 0.01 |
| centimeters | 0.1 cm | × 0.1 |
| meters | 0.001 m | × 0.001 |
| kilometers | 0.000001 km | × 0.000001 |
| nautical miles | 0.0000005399568035 nmi | × 0.000000539956803456 |
| micrometers | 1,000 µm | × 1,000 |
| nanometers | 1,000,000 nm | × 1,000,000 |
| thou | 39.37007874 thou | × 39.3700787402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: millimetres to nautical miles is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert millimeters to nautical miles? The converter and the working
- 1.Take the measurement in millimeters.
- 2.Multiply by 5.3996 × 10^-7 — that is how many nautical miles fit in one millimeter.
- 3.To go back the other way, divide by 5.3996 × 10^-7, or multiply by 1852000.
Worked example: 25 millimeters to nautical miles
- Formula
- mm × 5.3996 × 10^-7 = nmi
- Arithmetic
- 25 × 5.3996 × 10^-7 = 0.0000135 nmi
- Answer
- 25 mm = 0.0000135 nmi
The factor is rounded for display; the figure above is computed from the full value.
Millimeters to nautical miles conversion table
| Millimeters | Nautical miles |
|---|---|
| 1 mm | 5.40e-7 nmi |
| 2 mm | 0.00000108 nmi |
| 3 mm | 0.00000162 nmi |
| 4 mm | 0.00000216 nmi |
| 5 mm | 0.0000027 nmi |
| 6 mm | 0.00000324 nmi |
| 7 mm | 0.00000378 nmi |
| 8 mm | 0.00000432 nmi |
| 9 mm | 0.00000486 nmi |
| 10 mm | 0.0000054 nmi |
| 12 mm | 0.000006479 nmi |
| 15 mm | 0.000008099 nmi |
| 20 mm | 0.0000108 nmi |
| 25 mm | 0.0000135 nmi |
| 50 mm | 0.000027 nmi |
| 100 mm | 0.000054 nmi |
| 200 mm | 0.000108 nmi |
| 300 mm | 0.000162 nmi |
| 500 mm | 0.00027 nmi |
| 1000 mm | 0.00054 nmi |
| 2000 mm | 0.00108 nmi |
| 5000 mm | 0.0027 nmi |
| 10000 mm | 0.01 nmi |
What is a millimeter?
One thousandth of a meter. The working unit of metric engineering drawings, which avoid decimals by using it throughout.
What is a nautical mile?
Exactly 1,852 meters by international agreement since 1929, chosen because it is one minute of latitude — which is why a chart, a speed in knots and a position in degrees all use the same arithmetic.
How many nautical miles are in a millimeter?
One millimeter is 5.3996 × 10^-7 nautical miles. Going the other way, one nautical mile is 1852000 millimeters. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a millimeter.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
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Questions people actually ask
- How many nautical miles are in a millimeter?
- 5.3996 × 10^-7. Exactly 1,852 meters by international agreement since 1929, chosen because it is one minute of latitude — which is why a chart, a speed in knots and a position in degrees all use the same arithmetic.
- How do I convert nautical miles back to millimeters?
- Divide by 5.3996 × 10^-7, or multiply by 1852000 — they are the same operation.
Other length conversions
Nautical miles to millimeters — the same conversion the other way.