Geo Distance Calculator
Calculate distance between two coordinates using Haversine formula.
지점 A
기본값: 서울시청
지점 B
기본값: 부산시청
* Haversine 공식을 사용한 대원 거리(great-circle distance) 계산입니다. 지구를 완전한 구로 가정합니다.
Overview
Calculate the great-circle distance between two geographic coordinates using the Haversine formula. Results are provided in kilometers (km), meters (m), miles (mi), and nautical miles (nmi). Useful for logistics route planning, real estate analysis, and travel distance estimation.
Formula
Haversine formula: a = sin²(Δφ/2) + cos(φ₁)·cos(φ₂)·sin²(Δλ/2), c = 2·atan2(√a, √(1−a)), d = R·c. Where φ = latitude (radians), λ = longitude (radians), R = Earth's radius (6,371 km). This formula assumes a perfect sphere. For higher precision, use the Vincenty formula which accounts for Earth's ellipsoidal shape.
How to Use
- 1Enter latitude and longitude for Point A (e.g., Seoul City Hall: 37.5665, 126.9780).
- 2Enter latitude and longitude for Point B (e.g., Busan City Hall: 35.1796, 129.0756).
- 3The distance is automatically calculated in km, m, mi, and nmi.
- 4Right-click on Google Maps to easily copy coordinates for any location.
Tips
- ✔Latitude ranges from -90° to +90°; longitude ranges from -180° to +180°.
- ✔Haversine gives straight-line (great-circle) distance, not road distance.
- ✔Near the equator, 1° of latitude ≈ 111.32 km, and 1° of longitude ≈ 111.32 km.
- ✔For road distances, use routing APIs like Google Directions or Kakao Navi.
- ✔GPS coordinates from most map services can be directly used as input.
FAQ
Q. What is the Haversine formula?
The Haversine formula calculates the great-circle distance between two points on a sphere. It assumes Earth is a perfect sphere and is widely used in aviation and maritime navigation. Accuracy is within approximately 0.3%.
Q. How does great-circle distance differ from road distance?
Great-circle distance is the shortest path along Earth's surface between two points. Actual road distance can be 20–50% longer due to road layout, terrain, and detours. Use navigation APIs for accurate route distances.
Q. Where can I find latitude and longitude coordinates?
Right-click any location on Google Maps to see its coordinates. On Apple Maps, drop a pin and tap for details. Most map services and GPS devices display coordinates that can be directly used as input.
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