ISA Calculator

Eliot GeversEliot Gevers

Enter one property to calculate the others based on the International Standard Atmosphere model. Note: Calculating from temperature is only valid in the Troposphere.

Interactive Standard Atmosphere

100 km
0 km
Tropopause(11 km)
Stratopause(20 km)
Stratopause(32 km)
Stratopause(47 km)
Mesopause(51 km)
Mesopause(71 km)
Mesopause(85 km)
Troposphere
Tropopause
Stratosphere I
Stratosphere II
Stratopause
Mesosphere I
Mesosphere II
Mesopause
-100°CTemperature Profile20°C

Hover over the chart to see ISA values at different altitudes.

Open Source & Transparent

This tool is open source and the underlying logic is fully transparent. You can view the source code, understand the calculations, and even contribute improvements to make it better for everyone.

View Source Code