Enter the dB (decibel) value and optionally a reference value into the calculator to convert it to a normal value. The calculator can evaluate the normal value using the provided dB and reference values.

dB to Normal Value Formula

The following formula is used to convert a dB value to a normal value.

NV = RV * 10^{(dB / 10)}


  • NV is the normal value
  • RV is the reference value (default is 1 if not provided)
  • dB is the decibel value

To convert a dB value to a normal value, multiply the reference value by ten raised to the power of the dB value divided by ten.

What is a dB (Decibel)?

A decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity, often power or intensity. Decibels are commonly used in acoustics to quantify sound levels relative to a reference value. The decibel scale is logarithmic, meaning that a change of 10 dB represents a tenfold change in intensity.

How to Calculate Normal Value from dB?

The following steps outline how to calculate the normal value from a dB value.

  1. First, determine the dB value you want to convert.
  2. Next, determine the reference value (RV). If not provided, use the default value of 1.
  3. Use the formula NV = RV * 10^(dB / 10) to calculate the normal value (NV).
  4. Finally, enter the dB value and the reference value into the calculator to get the normal value.

Example Problem:

Use the following variables as an example problem to test your knowledge.

dB value = 20 dB

reference value (RV) = 1 (default)