Computers and gaming
Power supply calculator
Estimate PSU wattage from CPU, GPU, drives, cooling, peripherals, efficiency and upgrade margin.
Choose adequate power without blindly oversizing.
How it works
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What you need to begin
Keep the real details of your project or device to hand. You can correct answers during the process and no account is required to view the result.
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What the result contains
Choose adequate power without blindly oversizing.
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Limits of the simulation
The result is preliminary, depends on the accuracy of your answers and does not replace a quotation, diagnosis, certification or professional advice.
Frequently asked questions
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Is wattage the only criterion?
No. Build quality, protections, connectors, rail capacity and efficiency also matter.
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Why add headroom?
It covers transient loads, ageing and reasonable future upgrades without operating at the limit.