Sound Power to Pressure Calculator
Estimate free-field sound pressure level from sound power level, distance, and directivity factor.
A QUICK WALKTHROUGH
How to use this tool
- Enter matching measurements and period definitions.
- Review the formula assumptions and limits.
- Calculate locally in your browser.
Formula and limits
Lp=Lw+10log10(Q/(4πr²)) dB re 20 μPa convention. Point source, free field; reflections and barriers excluded. This is not a safety, regulatory, acoustic compliance, or storage-system guarantee.
Privacy
Inputs are processed locally and are not uploaded.
GOOD TO KNOW
Common questions
Does this predict performance?
No. It applies the displayed formula to values you provide.