Reverb Time Calculator
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V is room volume, A is total absorption in sabins (surface area × absorption coefficient summed for all surfaces). Metric: RT60 = 0.161 × V / A (V in m³).
RT60 = 0.049 × V ÷ A (V in ft³, A in sabins)Calculate each surface (walls, floor, ceiling) area multiplied by material absorption coefficient at target frequency. Sum all surfaces.
A = Σ (Surface area × Absorption coefficient)Different spaces need different reverb times. Dead spaces for recording vocals; livelier rooms for drums and orchestral recording.
Control room: 0.3–0.4s | Live room: 0.8–1.5s | Vocal booth: 0.1–0.3sUpdated: July 2026
1440 ft³ untreated RT60 ≈ 0.8s. Adding carpet, curtains, and 4 bass traps targets 0.35s for mixing accuracy.
400 ft³ room with wood floors and drywall at 0.6s RT60 — add reflective diffusion panels rather than absorption to maintain liveness.
64 ft³ booth needs heavy absorption (foam, fiberglass) to achieve 0.15s RT60 for dry vocal capture.
RT60 is the time for sound to decay 60 dB in an enclosed space — the standard measure of reverberation. Enter room dimensions and surface absorption coefficients to calculate RT60 using the Sabine equation and identify treatment needs.