Speed of Sound Calculator

The speed of sound depends on the medium and temperature. In dry air at 20°C it is approximately 343 m/s

The calculator uses the standard published formula for speed of sound. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, Celsius. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Speed in air = 331.3 × √(1 + T°C/273.15) m/s. Each step in the calculation is shown so you can verify the result manually.