Electronics & Circuits
Intermediate

Decibel (Power)

Power ratio expressed in decibels.

Formula

dB=10log⁡10P2P1dB = 10\log_{10}\frac{P_2}{P_1}

Variables

P_1,P_2Powers

Example

×10 ⇒ 10 dB

Did You Know?

Every 3 dB gain doubles power, so decibels turn huge multiplicative ranges into manageable additions.

decibelgaindb