What is the amenai technologies performance calculator?

The amenai technologies performance calculator estimates your aircraft's takeoff distance, climb rate, and density altitude, corrected for the day's conditions. It compares these to your aircraft card and shows green, amber, or red depending on margin. Free web trial; iOS and Android apps available.

How is density altitude computed?

Density altitude is computed from field elevation and OAT (outside air temperature). It represents the altitude the aircraft actually "feels", the number pilots most often forget to check before a hot-day takeoff.

What do the green, amber, and red colors mean?

Green means a comfortable margin, you're good to go. Amber flags that you should reconsider parameters: weight, runway, conditions. Red means insufficient margin, don't go. This is a convenience tool: it does not replace the pilot-in-command's judgement or full pre-flight preparation, which remain the PIC's responsibility.

Does the app also calculate climb performance?

Yes. The calculator shows the actual climb rate in ft/min and expresses it as a percentage of standard performance, with a status (Excellent, Normal, Poor, Dangerous) and an alert beyond the critical threshold.

Performance Takeoff & Climb

Your takeoff performance, in seconds.

Free web trial · iOS · Android

Takeoff distance, climb rate, density altitude: corrected for today's conditions and compared against your standard performance. Green, orange, red: you instantly know if the margin is safe.

Open in browser App Store Google Play

A short runway. A hot afternoon. A high elevation field.

Put them together and your takeoff distance can double while your climb rate is halved. Performance Takeoff & Climb applies the corrections, compares to your aircraft card, and gives you a visual verdict before you'd finished reaching for your pencil.

Three results, one decision.

Enter your parameters on the left, read the three result cards on the right. No ambiguity: each card carries a colored status and a percentage delta.

Takeoff

Calculated distance, corrected for altitude + temperature
Delta vs aircraft card (% vs standard)
Runway usage with visual gauge
"Exceeded" alert if the runway is too short

Climb

Actual climb rate (ft/min)
Performance level shown as a percentage
Status: Excellent, Normal, Poor, Dangerous
Degraded climb warning past a critical threshold

Density altitude

Altitude felt by the aircraft
Computed from field elevation and OAT
Instant readout: better than standard, normal, degraded
The number pilots forget to look at

Green, orange, red. No interpretation needed.

The same parameters tell two very different stories depending on the field and the weather. Performance surfaces them instantly.

Comfortable margin

Low field, 15 °C, 845 m grass runway: 70 % runway usage, climb rate at 94 % of standard, density altitude 420 ft. Comfortable takeoff.

Don't go

Same runway at 35 °C, with a heavier aircraft: takeoff distance exceeded, –26 % climb rate, density altitude 2,820 ft. You're not taking off from here today.

Built for safety

Takeoff distance

Corrected for today's conditions, with an alert the moment available runway falls short.

Actual climb rate

Not a brochure number: your real rate, given today's density altitude.

Density altitude

Computed from elevation and temperature: the number that actually governs performance.

Visual status

Excellent, Normal, Poor, Exceeded: legible in full sunlight on the tarmac.

Airfield database

Pick your departure field: elevation and runways fill in automatically.

Your aircraft card

Enter your standard distance and climb rate once: Performance corrects off your POH figures.

Instant

Results recalculate on every parameter change, no button to press.

Web, iOS, Android

Free in the browser, paid native app on iOS and Android for quick offline access.

Runway choice

Live wind, headwind and crosswind for every runway, slope and declared distances. The favoured runway gets a star.

QNH and pressure altitude

Enter today's QNH: pressure altitude is computed and every result is based on it.

Available everywhere

Try it free in the browser, then carry it into the cockpit on iOS or Android.

Calculate before you take off.

Less than a minute to enter your parameters. One color to decide. The reflex that can save a flight.

Try it on web