SPL from Power Calculator

Calculate speaker SPL from sensitivity, amplifier power, and distance. Free loudspeaker sound level calculator for system planning.

How the SPL power calculator works

Sensitivity at 1 W/1 m, amplifier power, listening distance, and optional peak headroom produce continuous and peak SPL estimates using logarithmic power and distance laws.

Key terms

  • Sensitivity - efficiency rating: higher dB means louder per watt.
  • Continuous vs peak SPL - programme material has short peaks above average level.
  • Inverse square law - -6 dB per doubling of distance for point sources.

Frequently asked questions

  • What is sensitivity? SPL produced at 1 W into 1 m on axis, typically 85-100 dB for pro and hi-fi drivers.