Free pc & home tool
PSU Wattage Estimator
Estimate a safe PC power supply wattage from CPU, GPU, and component power draw.
Runs locally in your browser. No signup needed.
Why use this?
A safe PSU target can prevent instability and leave room for upgrades.
Quick tips
- Use real CPU/GPU power draw when possible.
- Choose quality over maximum wattage.
- Leave headroom for spikes and future upgrades.