Choose Newegg's PC power supply calculator to build the perfect computer for your needs. Select the components you want, such as the CPU, GPU, and motherboard, and use our PSU …

Accurately determine the power supply requirements for your PC build. Input your components to get precise wattage recommendations, ensuring optimal performance and stability.

Find the perfect power supply unit (PSU) for your computer system with our accurate PSU calculator. Determine the ideal wattage based on your components and calculate power …

To calculate the correct wattage of the power supply we use the peak power consumption of each component in your configuration according to the manufacturer's information.

Our Power Supply Calculator tool helps you find the right PSU for your PC. Use it to calculate your PC’s wattage and choose the right PSU.

Use our PSU Calculator to find the perfect power supply for your PC build. Input your components and the calculator will work out the best PSU taking into account the wattage requirements for …

Use our Wattage Calculator to determine the ideal PSU for your system. Enter your components to receive accurate wattage recommendations.

Calculate the true power usage of a PC. Check how many watts your computer is using when idle or in full load. This online PSU calculator tells you all you need to know.

This PSU Wattage and Rails Calculator can calculate both wattage and individual voltage rail amperage (3.3V, 5V, 12V and 5VSB) required to run a PC system.

With WhatPSU.com you can easily find out what power supply you need for your PC by simply entering your CPU model and GPU model