Latitude Degrees to Nautical Miles
Updated recently with improved calculation accuracy and expanded examples.
Convert degrees of latitude (or longitude at the equator) to nautical miles along a meridian.
Last updated: August 28, 2026
Author: OceanCalc Editorial Team · Publisher: Albor Digital LLC
Latitude Degrees to Nautical Miles
Result
Nautical miles
60
Formula
1° latitude = 60 nm (meridian arc)What is the Latitude Degrees to Nautical Miles?
Convert degrees of latitude (or longitude at the equator) to nautical miles along a meridian.
Longitude distance varies with cos(latitude); this tool is for latitude or equator longitude.
nautical mile
A nautical mile is exactly 1,852 meters. One minute of latitude is approximately one nautical mile, but its exact length varies slightly with latitude on the reference ellipsoid. It is used worldwide in maritime and aviation navigation.
Related Maritime Calculators
Overview
A nautical mile is exactly 1,852 meters. A Latitude Degrees to Nautical Miles is used in maritime navigation to perform precise calculations based on established nautical formulas. This tool allows you to apply your inputs to the stated nautical relationships using accurate and standardized methods.
Key takeaways
- Latitude Degrees to Nautical Miles — A nautical mile is exactly 1,852 meters.
- Formula — One degree of latitude is approximately 60 nautical miles (one minute ≈ one nm); the exact length varies slightly with latitude on the reference ellipsoid.
- How to use — Fill the inputs for the Latitude Degrees to Nautical Miles; the tool recalculates live as you edit.
How to use
Fill the inputs for the Latitude Degrees to Nautical Miles; the tool recalculates live as you edit.
Formula
Core relationship: 1° latitude = 60 nm (meridian arc)
One degree of latitude is approximately 60 nautical miles (one minute ≈ one nm); the exact length varies slightly with latitude on the reference ellipsoid.
Longitude distance varies with cos(latitude); this tool is for latitude or equator longitude.
Practical use cases
Latitude Degrees to Nautical Miles: passage planning, crew briefings, instrument-to-chart unit checks, and verifying mental math when tired or in rough weather.
Tips for accuracy
- Match input units to your chart, GPS, or instrument before trusting the Latitude Degrees to Nautical Miles.
- Cross-check important outputs with a second method or crew when visibility or motion is poor.
- Treat simplified models (waves, radar horizon, etc.) as estimates; real conditions vary.
Practical examples
- 1° lat = 60 nm
- 0.5° = 30 nm
Frequently Asked Questions
Does this work for longitude everywhere?
Only at the equator. Elsewhere use cos(latitude) scaling or a rhumb/great-circle tool.
How accurate is this calculator?
It uses standard maritime formulas and noted approximations. Use it for planning and checks; confirm safety-critical decisions with official sources.
Can I use this on mobile?
Yes. Layouts are responsive for phones and tablets on deck or in the cockpit.
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These calculations are based on standard maritime navigation formulas used in seamanship, chart navigation, and marine route planning.
Results are estimates for educational purposes only and should not be used for real navigation decisions.