Free power supply calculators or PC power consumption calculator helps you calculate how much wattage do you need for your PC build！After calculating you can elect a suitable power supply unit（PSU）for your system. Below we have collected some power supply calculators on the Internet, they are free for use!

Power Supply Calculators One:

I like its interface! It is very simply. Input the CPU, GPU and all other components step by step and you will get the wattage needs of your entire system.  

Power Supply Calculators Two:

https://www.coolermaster.com/power-supply-calculator/ 

This calculator is popular and there are two versions of the calculation: the basic version and the expert version. In the basic version, standard keyboard, mouse, and 8 hours of computer utilization per day are already included in calculations. It can save your time if you are a new hand.

Power Supply Calculators Three:

Why should I use a pwer supply calculator?

You could damage the components if you install the PSU wrong. So using a PSU calculator is going to take any of the stress that comes with choosing the right PSU away from the build process.

Read More: How To Calculate How Long Your UPS System Will Run For