How do I calculate which power supply I need?

Add up the power consumption of all your PC components, including CPU, GPU, RAM, storage, and peripherals. Use a PSU calculator for precise results.

How to find the perfect PSU?

Choose a PSU with sufficient wattage, 80 Plus efficiency certification, and reliable brand reputation, ensuring about 20-30% headroom for upgrades.

How are PSUs calculated?

PSU wattage is calculated by adding the power needs of each component and accounting for overclocking, peripherals, and future upgrades.

Which calculator is most accurate?

Calculators like OuterVision and our PSU Calculator are highly accurate as they include a wide range of CPUs, GPUs, and customizable options.

Does PSU matter for FPS?

Indirectly, yes. A poor-quality PSU can lead to instability, crashes, or throttling, which can negatively impact FPS and overall performance.

PSU Calculator – Power Supply Calculator

PSU Calculator

CPU: GPU: RAM: Storage Devices: Case Fans: External Peripherals: Overclocking Overhead:

Total Power Usage: 0 W

What is PSU Calculator?

Choosing the right Power Supply Unit (PSU) is essential for building or upgrading a PC. A Power Supply Calculator simplifies this process by helping you determine the exact wattage your system requires. Without the right PSU, your system may face stability issues, overheating, or hardware failure.

Our Power Supply Calculator is designed to provide accurate results by considering every component in your system, from the CPU and GPU to the number of storage devices, peripherals, and even overclocking. Whether you’re a gamer, a content creator, or just building a reliable workstation, our tool ensures you pick the perfect PSU for your needs.

Best PSU Calculator 2025: Why Choose Ours?

When it comes to finding the best PSU calculator, accuracy, ease of use, and flexibility are critical factors. Here’s why our tool stands out as the best:

Extensive Hardware Options
Our tool includes all popular CPUs, GPUs, and other components to ensure precise wattage calculations. Whether you’re using an Intel i3, Ryzen 9, NVIDIA RTX 4090, or AMD RX 7900 XTX, the calculator covers it all.
Accurate Wattage Estimates
Unlike generic calculators, this tool factors in specific power consumption for each component, including overclocking and peripherals. This ensures reliable results tailored to your PC setup.
User-Friendly Interface
The calculator is designed for simplicity, making it accessible even for beginners. You can calculate your total wattage in just a few clicks.
Customizable Inputs
Add details like the number of fans, storage devices, and peripheral wattage to get a fully personalized result.
Free and Always Accessible
Our Best PSU Calculator is completely free and doesn’t require sign-ups or downloads, making it hassle-free to use.

How to Use the Power Supply Calculator?

Using the Power Supply Calculator is straightforward. Follow these steps:

Select Your CPU: Choose your processor from an extensive list of Intel, AMD, and other brands.
Select Your GPU: Pick your graphics card, including the latest NVIDIA and AMD models.
Enter RAM Details: Add the number of RAM sticks in your system.
Input Storage Devices: Specify the number of SSDs and HDDs.
Include Additional Components: Add case fans and external peripherals for an accurate estimate.
Overclocking Options: If you plan to overclock your CPU or GPU, include the additional wattage.

Once you’ve entered all details, hit Calculate Total Wattage, and the tool will provide your power requirements instantly.

Why Do You Need a Power Supply Calculator?

A PSU calculator is indispensable for anyone building a PC. Here’s why:

System Stability: Prevent crashes and hardware damage caused by underpowered PSUs.
Optimized Performance: A suitable PSU ensures all components work at peak performance.
Energy Efficiency: Avoid unnecessary energy consumption by selecting the correct wattage.
Future-Proofing: Choosing the right wattage allows for future upgrades without replacing your PSU.

Tips for Choosing the Right PSU

Once you’ve calculated your system’s wattage, here are some tips for choosing the perfect PSU:

Efficiency Rating: Look for PSUs with at least an 80 Plus Certification. Gold, Platinum, or Titanium ratings are ideal for efficiency and reliability.
Wattage Headroom: Choose a PSU with about 20-30% more wattage than your system’s requirements to accommodate upgrades.
Brand Reputation: Opt for trusted brands like Corsair, Seasonic, EVGA, or Cooler Master.
Modular vs. Non-Modular: Modular PSUs reduce cable clutter and improve airflow, especially in compact builds.

Complementary Tools for PC Builders and Gamers

In addition to the Power Supply Calculator, you can use these tools to further optimize your PC setup:

Games Bottleneck Calculator
Identify whether your CPU or GPU is creating a bottleneck in your gaming experience. This tool ensures your system is balanced for maximum performance.
FPS Calculator
Calculate the average Frames Per Second (FPS) for your favorite games based on your PC’s hardware. Plan upgrades to achieve smoother gameplay.

These tools work hand-in-hand with the PSU calculator to give you a complete understanding of your PC’s capabilities and requirements.

Why Our Tool is the Best PSU Calculator Online

When you search for the best PSU calculator, you want a tool that’s accurate, easy to use, and comprehensive. Here’s why our tool meets all those expectations:

Up-to-Date Hardware Database: Includes the latest CPUs and GPUs to keep up with modern PC builds.
Advanced Customization: Accounts for every detail, including overclocking, peripherals, and cooling solutions.
Fast and Free: Get results instantly without any cost.
Trusted by Enthusiasts: Designed with input from PC builders and gamers for reliable recommendations.

Final Thoughts

Whether you’re building a gaming PC, a workstation, or a general-purpose computer, selecting the right PSU is crucial. Our Power Supply Calculator takes the guesswork out of the process, providing accurate wattage estimates for your build.