Travel Calculators
Calculate distances between cities, convert GPS coordinates, and find compass bearings with free online travel calculators. Plan your trips with accurate geographic calculations.
Distance Between Cities Calculator
Calculate the driving and straight-line distance between any two cities worldwide.
Coordinates Calculator
Convert between coordinate formats (decimal degrees, DMS) and find coordinates on a map.
Directions Calculator
Calculate compass bearing and direction between two geographic coordinates.
About Travel Calculators
Our travel calculators provide essential geographic and navigation tools for trip planning, distance estimation, and coordinate work. All calculations use the Haversine formula for great-circle distances on Earth's surface, providing accurate results for any two points on the globe.
The Distance Between Cities Calculator lets you select from over 200 major cities worldwide or enter custom coordinates to calculate the straight-line (as-the-crow-flies) distance in kilometers, miles, and nautical miles. It also provides the initial bearing for navigation reference.
The Coordinates Calculator converts between the three major GPS coordinate formats: decimal degrees (DD), degrees-minutes-seconds (DMS), and degrees-decimal minutes (DMM). This is essential when working with different mapping systems and GPS devices.
The Directions Calculator computes the initial and final compass bearings between any two points, along with the geographic midpoint. This is useful for general navigation orientation, flight planning, and understanding great-circle routes.
Frequently Asked Questions
How accurate is the distance calculation?
Our calculators use the Haversine formula, which calculates great-circle distances with accuracy within 0.5% for most distances. This gives you the shortest path over Earth's surface between two points. Actual travel distances by road or air may be longer due to routes, terrain, and air traffic corridors.
What is the difference between DD, DMS, and DMM coordinates?
DD (Decimal Degrees) expresses coordinates as decimal numbers like 40.7128, -74.0060. DMS (Degrees, Minutes, Seconds) uses the traditional format like 40° 42' 46.08" N, 74° 0' 21.6" W. DMM (Degrees, Decimal Minutes) is a hybrid like 40° 42.768' N, 74° 0.36' W. All three represent the same location in different formats.
What is a nautical mile?
A nautical mile is 1,852 meters (approximately 1.151 statute miles). It was originally defined as one minute of arc of latitude, making it naturally suited for navigation. Nautical miles are the standard unit in aviation and maritime navigation worldwide.
How does compass bearing work?
Compass bearing is measured clockwise from true north (0°) through east (90°), south (180°), and west (270°) back to north (360°/0°). Our calculator provides the initial bearing (direction to face when starting your journey) and the final bearing (direction you would be facing upon arrival), which differ on great-circle routes.
Why does the bearing change along a route?
On a sphere, the shortest path between two points (great circle) is not a constant compass heading except along the equator or meridians. The initial and final bearings differ because the great-circle route curves relative to meridians. This is why long-distance flights appear curved on flat maps.