Nautical Mile Calculator
Convert nautical miles to other distance units, or estimate a great-circle distance from two coordinate points.
This is useful for marine travel, aviation planning, shipping routes, and map-based distance checks.
Calculated Result
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Run the calculation to see the distance.
Quick Answer
One nautical mile equals 1.852 kilometers, 1,852 meters, or about 1.15078 statute miles. In coordinate mode, the calculator estimates the great-circle distance between two points.
How to Calculate Nautical Miles
- Choose whether you want a unit conversion or coordinate distance.
- Enter the nautical miles or the two points you want to compare.
- Click Calculate.
- Read the converted units or the route distance.
Formula
1 nmi = 1.852 km = 1852 m = 6076.12 ft
Great-circle distance uses the haversine formula
Worked Examples
Example 1: 10 nautical miles = 18.52 km.
Example 2: New York to London is about 3,000 nautical miles depending on route and exact point pairs.
Example 3: 2 nautical miles = about 3.70 km.
How to Interpret Your Results
| Range | Meaning | Action |
|---|---|---|
| Under 5 nmi | Short marine or aviation segment | Useful for approach and local navigation |
| 5 to 100 nmi | Regional distance | Useful for coastal and cross-lake routes |
| 100+ nmi | Long route | Check charts, fuel, and weather planning |
Frequently Asked Questions
A nautical mile is longer. It is based on Earth coordinates and is used in navigation.
Coordinates let you estimate the shortest route over the Earth's surface, which is useful for travel and shipping.
Yes. It is a practical planning estimate, though operational flight planning should still use official navigation tools.
Related Calculators
References
- OmniCalculator reference page
- Nautical miles are defined by international convention.
- Last reviewed: March 2026.