PC Power Supply Calculator

Calculate exact PSU wattage for your build. Includes headroom recommendations for safety and efficiency.

How to use the PC Power Supply Calculator

  1. Add your CPU and GPU - the highest-draw components.
  2. Add storage drives, fans, RGB strips, and other peripherals.
  3. See total wattage with safety headroom (30% extra).
  4. Get a PSU wattage recommendation: 650W, 750W, 850W, 1000W, etc.
  5. Filter PSUs by wattage and 80+ rating to find a good match.

Power Consumption Calculator

GPU
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CPU
Select CPU...▾
CASE FANS
3 fans
Select components to calculate power →