The KochChart Density Altitude Software Tool

Welcome! This site is your source for the KochChart software tool. This tool compares various estimating methods (including, but not limited to, the Koch Chart) for assessing the impact of density altitude on take-off and rate-of-climb performance. In addition, the tool can estimate the effects of wind, runway slope and runway surface on take-off distance.

The algorithms used in the software were originally developed for light, single-engine, normally aspirated (i.e., not-turbocharged) piston aircraft. They are not applicable to other types of aircraft.

This is a free educational tool created to raise awareness about the significant effect density altitude has on aircraft performance, and is especially important for pilots flying at high-elevation airports.

You can download the KochChart software at this page. Look for the release with Latest badge after the release name.

The software was featured in a Colorado Pilot's Association webinar, which can be viewed here:
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The software discussion starts around the 32-minute point in the video.

Currently, the software is only available for Windows.

KochChart Disclaimer and License Agreement - Not for Flight Planning By using the software, you agree to the following terms:
1. Educational Use Only: This software is provided for instructional and educational purposes only. It does not meet the requirements of Federal Aviation Regulation (FAR) section 91.103 "Preflight Action" or any other regulation.
2. No Operational Use: This tool is not approved for flight planning or operational decision-making. Pilots must always consult their official Airplane Flight Manual (AFM) or Pilot's Operating Handbook (POH) for performance calculations.
3. License Terms: This software is free for personal, non-commercial use. Redistribution, modification, or commercial use is prohibited without prior written consent from the author.
4. No Warranty: This software is provided "as is," without any warranties or guarantees of accuracy, saftey, or fitness for any purpose. Use at your own risk.

Have a question or feedback? Contact me via GitHub
...or use the Contact Form below.