Airspeed Calculator
Convert between IAS, TAS, CAS, and groundspeed — with density altitude corrections.
How to Use
- Enter IAS and pressure altitude.
- TAS is computed for the given temperature.
| Low / pattern work | 2,000 ft |
| Trainer cross-country | 6,000 ft |
| Piston high cruise | 9,000 ft |
| Turbocharged single | 12,000 ft |
| Turbo / oxygen FL175 | 17,500 ft |
| Turboprop FL250 | 25,000 ft |
Show Work
Definitions
About the Airspeed Calculator
Airspeed Calculator is a quick, free tool for flight planning and aircraft performance. It works in your browser and keeps everything on your device. Convert between IAS, TAS, CAS, and groundspeed — with density altitude corrections.
How it works
Enter your figures and the result appears instantly, updating the moment you change anything. There is no submit button and nothing to wait for, so it is easy to try a few what-if numbers and compare the results. Just check each box holds the kind of value it expects.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
How do I use the Airspeed Calculator?
Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Does it cost anything or need an account?
No. The tool is completely free, there is no account to create, and it keeps working offline after the page first loads.
Is anything I type uploaded?
No. The tool works entirely on your device, so the values you enter never leave your browser.
Common Use Cases
Learn while you do it
Seeing what you put in and what comes out helps you understand how they fit together.
Get an answer fast
Type what you have and get the answer in seconds — on a phone, tablet, or computer.
Try different numbers
Change one thing and watch the answer change. It is an easy way to compare your choices.
Stays on your device
Your inputs never leave the browser — nothing is uploaded, logged, or stored anywhere.
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