Calculate dB, normal power value, or reference power from any two inputs, with unit options for watts, milliwatts, microwatts, and kilowatts.
dB to Normal Value Formula
The following formula is used to convert a dB value to a normal value.
NV = RV * 10^{(dB / 10)}Variables:
- 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.
| Decibels (dB) | Normal Value (W) |
|---|---|
| -40 | 0.0001 |
| -30 | 0.001 |
| -20 | 0.01 |
| -10 | 0.1 |
| -6 | 0.251 |
| -3 | 0.501 |
| -2 | 0.631 |
| -1 | 0.794 |
| -0.5 | 0.891 |
| 0 | 1 |
| 0.5 | 1.122 |
| 1 | 1.259 |
| 2 | 1.585 |
| 3 | 1.995 |
| 6 | 3.981 |
| 10 | 10 |
| 13 | 19.953 |
| 20 | 100 |
| 30 | 1000 |
| 40 | 10000 |
| * Values rounded to 3 decimals where applicable. Assumes reference P_ref = 1 W. Formula: P = P_ref × 10^(dB/10). | |
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.
- First, determine the dB value you want to convert.
- Next, determine the reference value (RV). If not provided, use the default value of 1.
- Use the formula NV = RV * 10^(dB / 10) to calculate the normal value (NV).
- 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)
