Newegg Power Supply Calculator [portable] < EXTENDED >

The 80 PLUS certification guarantees that the power supply converts wall AC power to PC DC power efficiently without wasting excess heat.

Newegg’s calculator relies on a database of TDP (Thermal Design Power) and TGP (Total Graphics Power) values provided by hardware manufacturers.

PCPartPicker is generally superior for build completion and compatibility checking, but Newegg’s calculator stands out for its dedicated UPS recommendation feature. newegg power supply calculator

The Newegg Power Supply Calculator is a free digital tool designed to estimate the total wattage your custom computer requires. Choosing the correct Power Supply Unit (PSU) prevents system instability, hardware damage, and unnecessary energy expenses. Why Accurate Wattage Calculation Matters

The tool simplifies the building process by providing a guided interface to select your key parts: The 80 PLUS certification guarantees that the power

PSUs reach peak electrical efficiency when running between 40% and 80% of their maximum rated load.

The interface allows users to manually input component counts (e.g., "4 sticks of RAM," "2 SSDs"), providing a granular level of detail not found in simpler sliders. The Newegg Power Supply Calculator is a free

While useful for a "rough minimum" starting point, its results are often debated in the PC building community.

Never buy a power supply that exactly matches your calculated wattage. If the Newegg tool states your system needs 500W, you should purchase a .