Latitude & Longitude Calculator
Use decimal degrees (latitude from -90 to 90, longitude from -180 to 180).
1) Calculate distance, bearing, and midpoint
2) Convert decimal coordinates to DMS format
What Is a Latitude and Longitude Calculator?
A latitude and longitude calculator helps you work with geographic coordinates quickly and accurately. Instead of manually applying trigonometry, you can enter two points and instantly get practical outputs such as great-circle distance, initial direction (bearing), and midpoint.
Whether you're planning travel, mapping business locations, studying geography, or building an app with location features, this kind of calculator removes guesswork and reduces data entry mistakes.
How This Calculator Works
Great-circle distance
The shortest route between two places on Earth is not a straight line on a flat map. It is an arc over the globe, called a great-circle path. This tool uses the Haversine formula:
distance = 2R × asin( sqrt( sin²(Δφ/2) + cos φ1 × cos φ2 × sin²(Δλ/2) ) )
Here, R is Earth’s mean radius, φ is latitude in radians, and λ is longitude in radians.
Initial bearing
The initial bearing tells you the direction to begin traveling from Point A toward Point B. It is shown in degrees from north (0° to 360°) and with a compass label such as NE or WSW.
Midpoint
The midpoint is the geographic center of the great-circle path between two coordinates. This is useful when choosing a meetup location or planning regional hubs.
When to Use It
- Estimate flight or shipping distances between cities.
- Plan road-trip checkpoints and map segments.
- Compare customer proximity to different stores.
- Validate geospatial data in spreadsheets or APIs.
- Convert decimal coordinates into DMS format for reports.
Coordinate Formats: Decimal vs DMS
Coordinates are commonly written in two ways:
- Decimal Degrees (DD):
40.7128, -74.0060 - Degrees Minutes Seconds (DMS):
40° 42' 46.08" N, 74° 0' 21.60" W
Decimal format is easier for software, while DMS is often preferred in navigation, surveying, and educational materials.
Accuracy Tips
- Confirm latitude is between -90 and +90.
- Confirm longitude is between -180 and +180.
- Use at least 4 to 6 decimal places for precise location work.
- Remember this tool computes spherical distance, not turn-by-turn road distance.
- For high-precision geodesy, use ellipsoid-based calculations as a follow-up.
Quick FAQ
Is this the same as driving distance?
No. This calculator gives the shortest surface path on Earth (as-the-crow-flies). Driving distance depends on roads, terrain, and routing.
What if I enter negative values?
Negative latitude means south of the equator. Negative longitude means west of the prime meridian.
Can I use this for aviation or marine routes?
Yes, it is useful for rough planning and educational checks. Operational navigation should use approved systems and up-to-date data sources.
Final Thoughts
A dependable latitude and longitude calculator is one of the most practical geospatial tools you can keep on hand. It helps you move from raw coordinate data to meaningful decisions in seconds—whether you're mapping, traveling, or analyzing location-based business opportunities.