Power Supply Efficiency Calculator
Determine PSU efficiency by comparing output to input power.
Approximate values; check manufacturer specifications.
Examples
- Output 400 W, Input 500 W ⇒ 80%
- Output 300 W, Input 360 W ⇒ 83.33%
- Output 600 W, Input 750 W ⇒ 80%
FAQ
Why is efficiency important?
Higher efficiency reduces wasted energy.
Can efficiency exceed 100%?
No, it's always below 100%.
Do ratings vary with load?
Yes, efficiency changes depending on load.
Is this for AC to DC supplies?
Yes, it's commonly used for PSU comparisons.
Additional Information
- Efficiency = (output ÷ input) × 100.
- Higher efficiency reduces wasted energy and heat.
- Actual efficiency varies with load and operating conditions.