Great Circle Route Calculator

Distance, initial and final bearing, midpoint and waypoints between two coordinates.

Calculations run locally in your browser; nothing is sent to a server.

Formula and method

Bearing θ = atan2(sin Δλ·cos φ₂, cos φ₁·sin φ₂ − sin φ₁·cos φ₂·cos Δλ). Waypoints by spherical interpolation.

JFK → LHR initial bearing ≈ 51°.