Nautical to Statute Miles Converter
Convert nautical miles to statute miles and kilometres — and see why a sea mile is longer than a land mile.
How it works
1 nautical mile = 1.150779 statute miles = 1.852 km = 1852 m
A nautical mile is defined as exactly 1,852 metres, chosen to equal one minute of latitude along a meridian, which makes it natural for navigation. The statute (land) mile is 1,609.344 metres, so a nautical mile is about 15% longer — a distance that looks the same in "miles" is meaningfully greater at sea. Charts, ranges and speeds in aviation and shipping are quoted in nautical miles for exactly this geometric convenience.
Worked example
100 nautical miles × 1.150779 = 115.08 statute miles, or 100 × 1.852 = 185.2 km. So a 100 nm leg is the same as covering just over 115 land miles.
Sources: Nautical mile — Wikipedia
Frequently asked questions
Why is a nautical mile longer than a statute mile?
They come from different definitions. The nautical mile is tied to the Earth’s geometry — one minute of latitude, standardised to 1,852 m — while the statute mile (1,609.344 m) descends from Roman and English land measures. The result is that a nautical mile is about 1.15 statute miles.
When should I use nautical vs statute miles?
Use nautical miles for air and sea navigation, where distances relate to latitude and speeds are in knots. Statute miles are for road distances and everyday land use. Mixing them silently is a classic planning error.
How many feet are in a nautical mile?
About 6,076 feet, versus 5,280 feet in a statute mile. That 6,076-ft figure is why glide and range distances in aviation convert to nautical miles by dividing feet by 6,076.
Related calculators
This calculator is for educational purposes. Double-check important results before acting on them.