Computer PSU Wattage Calculator

Building a new PC or upgrading your existing one? Use our calculator to determine the recommended power supply wattage for your components to ensure optimal performance and stability.

* Calculations are rounded up for easier power supply selection. An extra 10% headroom is also added for system stability.

Quick Guide: How to Use the Calculator

Getting started is easy. Here's how to get your result:

1. Choose Your Components
   Select your CPU, GPU, cooling setup, and storage devices from the dropdowns.

2. Adjust Quantities If Needed
   Got more than one graphics card or drive? You can fine-tune the numbers to match your exact build.

3. Click Calculate
   Hit the button, and we'll give you a recommended PSU wattage—including a bit of headroom for safe, reliable operation.

Helpful Power Supply Tips

• Leave Room to Grow
  Planning future upgrades? Go with a PSU that offers a little extra power.

• Check for Efficiency Ratings
  Look for 80 Plus certifications—these models use power more efficiently and generate less heat.

• Double-Check Compatibility
  Make sure your PSU fits your case and supports the connections your components need.

Why Proper Power Supply Selection Matters

An underpowered PSU can lead to system instability, random shutdowns, or even component damage. On the other hand, an extremely oversized PSU may waste energy and money. Our calculator helps you find the sweet spot for reliable performance.