Before you use this app

This tool assists flight preparation and does not replace the aircraft flight manual. The pilot in command remains solely responsible.

It contains no aircraft or aerodrome data of its own: every figure it uses is one you enter, taken from your own flight manual and your own aerodrome chart. Its corrections for altitude, temperature, wind and slope are approximations, described in full under “Method and assumptions”.

toldcalc

Aircraft — from your flight manual

Fill in only the manoeuvre you need. Takeoff and landing are worked out independently of each other.

Takeoff

Ground roll

Over 15 m / 50 ft obstacle

Landing

Ground roll

Over 15 m / 50 ft obstacle

Optional

Aircraft

Max demonstrated crosswind (kt)

Grass penalty (%, applied on grass runways)

Runway — from your aerodrome chart

Aerodrome / runway (optional)

Field elevation (ft)

Actual runway surface

Runway direction (° magnetic)

Takeoff distance available

Landing distance available

Slope (%, uphill positive)

Weather & margin

METAR — ICAO code

Temperature

QNH

Wind direction (° magnetic)

Wind speed (kt)

Safety margin (factor ×)

Wind

Altimeter — field / density

Takeoff

Ground roll

–

Over 15 m / 50 ft

–

With margin

–

Available

–

Landing

Ground roll

–

Over 15 m / 50 ft

–

With margin

–

Available

–

Method and assumptions

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