Educational calculators only. Not for operational flight planning.

Aircraft Performance Concepts

Climb rate, climb gradient, simple range estimates and thrust-to-weight ratio. These calculators show how the quantities relate to each other; real performance figures for any aircraft come only from its flight manual.

Aircraft climbing along a flight path above a ground line, with a shaded triangle marking height gained over distance covered.

Calculators

Aircraft Range Estimator

A simple constant-speed, constant-fuel-flow range estimate with a wind component you enter.

Aircraft Performance Concepts

Rate of Climb Calculator

The rate of climb that matches a climb gradient at a given ground speed.

Aircraft Performance Concepts

Climb Gradient Calculator

Climb gradient in percent, feet per nautical mile and degrees from rate of climb and ground speed.

Aircraft Performance Concepts

Guides

Aircraft Performance Concepts

Thrust-to-Weight Ratio in Aviation

Thrust-to-weight ratio is a dimensionless comparison of two forces, and it changes throughout a flight as thrust varies and fuel burns off.

Aircraft Performance Concepts

Climb Gradient vs Climb Rate

Climb rate is height per minute; climb gradient is height per distance over the ground. Ground speed links them, so wind changes one and not the other.

Aircraft Performance Concepts

Understanding Rate of Climb

Rate of climb is height gained per minute, and it comes from excess power. See the formula, what reduces it, and why steady wind does not change it.

Aircraft Performance Concepts

How Aircraft Range Is Estimated

Range is ground speed multiplied by endurance. See how wind changes the distance but not the time, and what a simple range estimate leaves out.