What inputs do I need?

You need the power consumption of each component in watts, such as CPU, GPU, drives, and peripherals.

Does it include safety margin?

Yes, the calculator adds a recommended safety margin to ensure stability.

Power Supply Size Calculator

Q: Can I use it for gaming PCs?

Yes, it works for gaming, workstation, or general purpose PCs.

Estimate the required PSU wattage for your PC or electronic project.

Recommended PSU Size

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About Power Supply Size Calculator

CalHub’s Power Supply Size Calculator helps you determine the required wattage for your PC or electronics project. By summing the power consumption of each component and adding a safety margin, you ensure stable and efficient performance.

How to Use?

Enter the name and power consumption (in watts) of each component (CPU, GPU, drives, etc.).
Click "Add Component" to include more components.
Click "Calculate PSU Size" to get the recommended power supply wattage.
The calculator adds a safety margin to ensure stable operation.

Frequently Asked Questions

Yes, the Power Supply Size Calculator is completely free to use.

You need the power consumption of each component in watts (CPU, GPU, drives, peripherals).

Yes, a recommended 20% safety margin is added to ensure stable PSU operation.

Yes, it works for gaming, workstation, or general-purpose PCs.

No registration is required. You can use it instantly.