Flight Distance Calculator

A flight distance calculator uses the Haversine formula to compute the great-circle distance between two geographic coordinates — the shortest surface path aircraft follow. Use this calculator for accurate, instant results.

The calculator uses the standard published formula for flight distance. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, kilometres, kilometres per hour. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Earth mean radius = 6,371 km. Each step in the calculation is shown so you can verify the result manually.