Sound Pressure Level (SPL) Formula & Calculator

Sound Wave Acoustic pressure level Calculation

P - Sound presure (Pa)
P0 - Reference sound presure (Pa)

Sound pressure level (SPL) calculator - formula & step by step calculation to measure the logarithmic RMS value of the sound or acoustic pressure caused by the sound wave relative to a reference value in decibels. SPL (dB) = 10 log10(p2/po2). Sound pressure p in Pa & reference sound pressure level po in Pa are the key elements of this calculation. It's useful tool to find out the audible sound or noise pollution.


In environmental engineering, the below formula is used to calculate the sound wave's acoustic pressure level. The step by step calculation for each set of inputs let users to understand how to perform such noise wave pressure calculations manually.
formula to calculate Sound Pressure Level (SPL)

In the field of environmental engineering, while working with noise pollution, sometimes it's important to analyse the sound wave's characteristics. The above formula & step by step calculation may useful for users to understand how the values are being used in the above formula, however, when it comes to online for quick calculations, this sound pressure level (SPL) calculator helps the user to perform & verify such calculations as quick & easy as possible.