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.
Inputs
Result
Definitions
IAS
Indicated Airspeed — what the instrument reads
CAS
IAS corrected for instrument and position error
TAS
True airspeed — CAS corrected for density
GS
Ground speed — TAS ± wind component
Rule of thumb
TAS ≈ IAS × (1 + 0.02 · alt_kft)
Last updated: