Recalculate SPL at Different Power & Distance
Have a datasheet SPL but a different setup in the real world? Use this calculator to estimate the Sound Pressure Level (SPL) for your power and listening distance. The estimation relies on simple acoustic rules of thumb: doubling power ≈ +3 dB, while doubling distance ≈ −6 dB.
To use the calculator, fill in the SPL given on the datasheet (with its reference Power and Distance), then your Target Power and Target Distance. The tool outputs the predicted SPL Calculation for those conditions.
We apply the free-field model:
SPL₁ = SPL₀ + 10·log₁₀(P₁ / P₀) − 20·log₁₀(d₁ / d₀)
No. +3 dB is twice the power, not necessarily twice the perceived loudness.
Enter meters (e.g., 50 cm → 0.5 m; 3 ft → 0.914 m).
Rooms add reflections and modal behavior; the calculator intentionally models a free-field to keep predictions simple and consistent.