Power Supply Calculator

Calculate power supply requirements, efficiency analysis, and operating costs for electronic devices and computer systems. Size PSUs properly with safety margins and efficiency considerations.

Power Supply Analysis

AC Input
Pin
Watts
Power Supply
η = XX%
Heat Loss
XX W
DC Output
Pout
Watts
Efficiency = Pout / Pin × 100%

Calculation Type

Load-Based Power Supply Sizing

W
%
%

About Power Supply Calculations

Proper power supply sizing ensures reliable operation, efficiency, and longevity of electronic systems. Consider load requirements, efficiency ratings, and safety margins for optimal PSU selection.

Key Considerations:

  • Safety Margin: 20-30% headroom for peak loads and aging
  • Efficiency: Higher efficiency reduces heat and operating costs
  • 80 PLUS Ratings: Certification levels for efficiency standards
  • Load Curve: PSUs are most efficient at 50-80% load

80 PLUS Efficiency Standards:

  • 80 PLUS: 80% efficiency at 20%, 50%, and 100% load
  • Bronze: 82%, 85%, 82% efficiency
  • Silver: 85%, 88%, 85% efficiency
  • Gold: 87%, 90%, 87% efficiency
  • Platinum: 90%, 92%, 89% efficiency
  • Titanium: 92%, 94%, 90% efficiency