Amplifier Power, Voltage and Current Calculator

This calculator for amplifier power, voltage and current has little significance but is rather interesting.

In the specifications for an amplifier, it might say something like this:

This is telling you the RMS power (or more correctly, the continuous power) with a 8 ohm load and a different continuous power with a 4 ohm load. But what is the peak power? What is the output RMS voltage and peak-peak voltage? What current is the amplifier delivering through the speakers?

This calculator displays the continuous power, peak power, RMS voltage and peak to peak (p-p) voltage. It displays these results in numbers and graphically. It also calculates the RMS current and peak current.

Simply type in the RMS or Continuous power as stated in the specs, and then enter the test load used (eg. 4 ohms or 8 ohms)

So what can you do with the results of this calculator? Absolutely nothing!

It is for information only. It is for those of you who like to understand and/or visualize what the specs mean and what your amplifier is doing.

These calculations are for a setup similar to how manufacturers test the power capabilities of their amplifiers. They normally drive the amplifier with a sine wave into a test load (normally 4 ohms or 8 ohms) which is not normally a speaker, but rather a constant value non-inductive resistor.

For and explanation of these terms and measurements, see the article on Understanding Amplifier Power.

Please Note: During the Covid-19 pandemic I'm busy with a number of streaming projects, and have very limited time to attend to this website. I'm currently taking up to a week to answer questions. Sorry for any inconvenience.

Disclosure: If you buy through this Amazon USA link Geoff receives a small commission from each sale.
European and Australian readers can use the links on the side panel - Thanks for the support

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Hello Geoff, Please can you help me, i just bought this Speaker Switch Box OMNITRONIC LUB-27 Speaker Switch Box, my question is how many watts ( max ) Speaker can i use, what is power rating: 25 A per channel in speaker watts. Speaker/amplifier switch box with IR remote control 7-channel switch box for speaker pairs or amplifiers Ideal for showrooms for comparing the performance of different speakers or amplifiers Operating mode 1: switching over on 7 speaker pairs to 2 stereo amplifiers with A/B selection Operating mode 2: switching over on 7 stereo amplifiers to 2 speaker pairs with… Read more »