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PSU Wattage Calculator

Ensure your PC has enough power. Select your core components to get a recommended PSU wattage.

Advanced PSU Calculator

Calculate precise power requirements with efficiency analysis

PSU Wattage Calculator – Find the Right Power Supply for Your Gaming PC

Choosing the right Power Supply Unit (PSU) is critical for building a stable and future-proof gaming PC. An underpowered PSU can cause crashes, random shutdowns, or even long-term damage to your components. Our PSU Calculator makes it easy to estimate the exact wattage your system needs, whether you’re planning a fresh build or upgrading your graphics card.

Why Use a PSU Wattage Calculator?

Picking a PSU isn’t just about grabbing the highest wattage you can find. Overspending on an unnecessarily powerful PSU wastes money, while underestimating your needs risks system instability. A PSU wattage calculator ensures that you strike the perfect balance between cost, efficiency, and performance.

How Does the PSU Calculator Work?

Our tool analyzes the combined power requirements of your CPU, GPU, RAM, storage devices, and peripherals. It then recommends the ideal PSU wattage to prevent bottlenecks and ensure long-term stability. This way, you can buy confidently without overpaying for extra power you’ll never use.

For the most accurate analysis, pair this tool with our PC Bottleneck Calculator. It identifies weak links in your system so you know whether your next upgrade should be a GPU, CPU, or power supply.

Benefits of Using Our PSU Calculator

  • Prevent Crashes & Instability: Ensure your PSU can handle your most demanding gaming sessions.
  • Save Money: Avoid overspending on an unnecessarily high-wattage power supply.
  • Future-Proof Your Build: Account for upcoming upgrades like GPUs or additional storage.
  • Peace of Mind: Build a system that runs smoothly under full load without risk.

Build Smarter with the Right PSU

The PSU is the foundation of a reliable gaming rig. With our PSU Wattage Calculator, you can accurately determine how much power your system needs before making a purchase. Pair it with our FPS Calculator to see how your hardware translates into real-world gaming performance and achieve the perfect balance between power and gameplay.

Got your power sorted?

Now, make sure your CPU and GPU are a balanced match for peak performance. An unbalanced system can waste your hardware's potential.

Check for Bottlenecks →

Frequently Asked Questions

Quick answers to common questions about choosing the right PSU for your gaming PC.

How does the PSU calculator determine the required wattage?
The PSU calculator estimates wattage by analyzing your CPU, GPU, RAM, storage devices, cooling system, and additional components. It also adds a recommended safety margin for stability and future upgrades.
Is it bad to use a PSU with much higher wattage than needed?
No. A higher-wattage PSU won’t damage your PC — it simply provides extra headroom. Your system only draws what it needs. For best efficiency, aim for 50–70% load utilization.
Does PSU efficiency (80 Plus rating) affect gaming performance?
PSU efficiency ratings don’t directly affect FPS. Instead, they show how much power is wasted as heat. A higher efficiency PSU reduces electricity use and helps keep your PC cooler.
Can undervaluing PSU wattage cause hardware damage?
Yes. Using an underpowered PSU may cause crashes, boot failures, or stress components over time. The PSU calculator helps prevent this by recommending the correct wattage for your build.