Use this calculator for flight-planning study or a first-pass cross-check when all inputs describe the same aircraft, atmospheric condition, and phase of flight.

Departure time

Departure time of day in HH:MM 24-hour format.

Distance (nm)

Distance to the waypoint.

Ground speed (kt)

Ground speed along the route to the waypoint.

Estimate the clock time of arrival at a waypoint from a departure time, distance, and ground speed. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

ETA

Waypoint arrival time of day in HH:MM format, wrapping past midnight.

Elapsed time (min)

Total en route minutes used for the estimate.

• Do not use a generic calculator in place of the current aircraft flight manual, approved performance data, operating limitations, NOTAMs, weather, or regulations. Real performance changes with configuration, runway condition, altitude, temperature, wind, loading, and technique.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Cross-check the result against the aircraft flight manual or approved planning system, then apply the required safety margins. Keep signed wind, heading, altitude, speed, and fuel conventions explicit.

• ETA Calculator

  Compute the estimated time of arrival from a departure clock time and flight duration.

• Flight Time Calculator

  Compute the flight time over a distance at a given ground speed.

• Groundspeed Required for ETA Calculator

  Compute the constant ground speed needed to cover a distance before a deadline.