Convert Nautical miles to Miles
1 nautical mile is 1.15 mi. One nautical mile is exactly 1.15077944802 miles.
One nautical mile is 1.1507794 miles. To convert nautical miles to miles, multiply by 1.1507794; to go the other way, divide by 1.1507794 or multiply by 0.86897624. 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.
Factor checked against the defining standard · How we check
- Nautical miles × 1.1507794
1 * 1.15077941.151 mi
1 nautical mile in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 72,913.38583 in | × 72,913.3858268 |
| feet | 6,076.115486 ft | × 6,076.11548556 |
| yards | 2,025.371829 yd | × 2,025.37182852 |
| miles | 1.150779448 mi | × 1.15077944802 |
| millimeters | 1,852,000 mm | × 1,852,000 |
| decimetres | 18,520 dm | × 18,520 |
| centimeters | 185,200 cm | × 185,200 |
| meters | 1,852 m | × 1,852 |
| kilometers | 1.852 km | × 1.852 |
| nautical miles (as entered) | 1 nmi | — |
| micrometers | 1,852,000,000 µm | × 1,852,000,000 |
| nanometers | 1,852,000,000,000 nm | × 1,852,000,000,000 |
| thou | 72,913,385.83 thou | × 72,913,385.8268 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert nautical miles to miles? The converter and the working
- 1.Take the measurement in nautical miles.
- 2.Multiply by 1.1507794 — that is how many miles fit in one nautical mile.
- 3.To go back the other way, divide by 1.1507794, or multiply by 0.86897624.
Worked example: 25 nautical miles to miles
- Formula
- nmi × 1.1507794 = mi
- Arithmetic
- 25 × 1.1507794 = 28.77 mi
- Answer
- 25 nmi = 28.77 mi
The factor is rounded for display; the figure above is computed from the full value.
Nautical miles to miles conversion table
| Nautical miles | Miles |
|---|---|
| 1 nmi | 1.15 mi |
| 2 nmi | 2.3 mi |
| 3 nmi | 3.45 mi |
| 4 nmi | 4.6 mi |
| 5 nmi | 5.75 mi |
| 6 nmi | 6.9 mi |
| 7 nmi | 8.06 mi |
| 8 nmi | 9.21 mi |
| 9 nmi | 10.36 mi |
| 10 nmi | 11.51 mi |
| 12 nmi | 13.81 mi |
| 15 nmi | 17.26 mi |
| 20 nmi | 23.02 mi |
| 25 nmi | 28.77 mi |
| 50 nmi | 57.54 mi |
| 100 nmi | 115.08 mi |
| 200 nmi | 230.16 mi |
| 300 nmi | 345.23 mi |
| 500 nmi | 575.39 mi |
| 1000 nmi | 1,150.78 mi |
| 2000 nmi | 2,301.56 mi |
| 5000 nmi | 5,753.9 mi |
| 10000 nmi | 11,507.79 mi |
A nautical mile is a minute of latitude, which is why it is not a mile
It is exactly 1,852 meters — about 1.151 statute miles — and it was chosen so that one minute of latitude equals one nautical mile anywhere on a chart. That is also why speed at sea is measured in knots: one knot is one nautical mile an hour, so a position, a distance and a speed all use the same units without conversion.
NIST Special Publication 811 — Guide for the Use of the International System of Units
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.
What is a mile?
Exactly 5,280 feet — a survivor of the Roman mille passus, rounded up by an English statute of 1593.
How many miles are in a nautical mile?
One nautical mile is 1.1507794 miles. Going the other way, one mile is 0.86897624 nautical miles. 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 nautical mile.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
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Questions people actually ask
- How many miles are in a nautical mile?
- 1.1507794. Exactly 5,280 feet — a survivor of the Roman mille passus, rounded up by an English statute of 1593.
- How do I convert miles back to nautical miles?
- Divide by 1.1507794, or multiply by 0.86897624 — they are the same operation.
Other length conversions
Miles to nautical miles — the same conversion the other way.