Calculate Pc Power Consumption -

[ \textEnergy (kWh) = P_\textAC (kW) \times \texthours used per day \times \textdays per month ] [ \textCost = \textEnergy (kWh) \times \textelectricity rate ($/kWh) ]

If your PC is already built, you can use software to see what individual components are drawing in real-time. calculate pc power consumption

Monthly kWh × Your Local Electricity Rate (e.g., $0.15) . Summary: Average Power Draws Standard Office PC: 60W – 150W Mid-Range Gaming PC: 250W – 450W High-End Enthusiast Rig: 600W – 850W+ Pro Tip: The 80% Rule [ \textEnergy (kWh) = P_\textAC (kW) \times \texthours

Buy a 650W or 750W PSU . Do not buy a 400W or 500W unit. Do not buy a 400W or 500W unit

Sum your components to get your .

These are great for quick estimates, though they often lean slightly high to recommend a power supply from their own catalog.

Here's a step-by-step guide to calculate your PC's power consumption: