Speed of Sound in Air Calculator

Speed of sound in dry air at a given temperature, and the distance to a lightning strike from the thunder delay.

How to use the Speed of Sound in Air Calculator

Enter or select: Air temperature.
Fill in what you know of: Thunder delay (optional) — leave the unknown empty.
The results (Speed of sound, Lightning distance) are calculated instantly as you type.
Use “Copy link” to share the calculation with the same input values.

Formula

v ≈ 331.3·√(1 + T/273.15) m/s