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Flight Time: Ground-Speed Legs and Route Totals

Calculate ground-distance travel time with unit conversion, or sum unequal-speed route legs and explicit circling, climb or delay allowances.

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Inputs that matter
Horizontal ground distance, Distance unit, Ground speed, Ground-speed unit, and 2 more
Output to expect
Time for a ground-distance leg, Route legs and additional time
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Time for a ground-distance leg

Calculate travel time using horizontal ground distance and positive ground speed. Airspeed must first be combined with wind; still-air airspeed is not automatically ground speed.

Time = distance / ground speed. Unit definitions: 1 NM = 1852 m; 1 mile = 1609.344 m.

Route legs and additional time

Sum actual planned legs with different ground speeds and explicitly entered additional time. Do not use an arithmetic average of leg speeds. The additional-time column may include planned circling, climb or delays; keep its meaning with each label.

Total moving time = Σ distance/ground speed; total elapsed time = moving time + Σ additional time.

Updated: September 2026

Example Scenarios

Use the example to inspect the method and breakdown, then enter your own documented observations or equipment data.

→ 30 min ground-distance travel time

Use the example to inspect the method and breakdown, then enter your own documented observations or equipment data.

→ 53 min total modeled elapsed time

FAQ

Calculate travel time using horizontal ground distance and positive ground speed. Airspeed must first be combined with wind; still-air airspeed is not automatically ground speed. Sum actual planned legs with different ground speeds and explicitly entered additional time. Do not use an arithmetic average of leg speeds. The additional-time column may include planned circling, climb or delays; keep its meaning with each label.

Retain the measurement time and location, equipment or source document, units and assumptions. Examples illustrate the calculation and must be replaced with your own actual data before saving a personal case.

Use Save planning case for an explicit local history entry. Copy MD includes inputs and notes; Download CSV exports the result breakdown. Keep portable copies and save a separate case after changing the assumptions.

About Flight Time: Ground-Speed Legs and Route Totals

Calculate travel time using horizontal ground distance and positive ground speed. Airspeed must first be combined with wind; still-air airspeed is not automatically ground speed. Sum actual planned legs with different ground speeds and explicitly entered additional time. Do not use an arithmetic average of leg speeds. The additional-time column may include planned circling, climb or delays; keep its meaning with each label.