RT60 Calculator

How It Works

RT60 is the time it takes for sound to decay by 60 dB after the source stops. The Sabine equation RT60 = 0.161V/A calculates this from room volume (V in m³) and total absorption (A in sabins). Each surface contributes area × absorption coefficient to total A. Ideal RT60: mixing rooms 0.2-0.4s, control rooms 0.3-0.5s, live rooms 0.8-1.2s. Common absorption coefficients: concrete 0.02, drywall 0.05, carpet 0.3, acoustic foam 0.7, heavy drapes 0.55.