Simple inputs
Answer only the questions needed to calculate a useful result.
Turn PC questions into useful answers with simple calculators built for speed and clarity.
Choose a PC calculator, enter your numbers, and get an instant result with no account or unnecessary steps.
Answer only the questions needed to calculate a useful result.
See your result as soon as you are ready, without creating an account.
Understand what the number means so you can make a better decision.
Start with the question you need to solve. Every published PC calculator is collected here automatically, so the newest tools are always easy to find.
Estimate the recommended power supply wattage by adding component power draw and extra headroom for transient spikes, capacitor aging, efficiency, and future…
Open calculatorEstimate a power supply unit's efficiency based on output power, input power, load level, and 80 PLUS certification adjustment. Efficiency is calculated…
Open calculatorEstimate total system power draw and recommended power supply capacity based on major component loads, planned component count, and headroom for efficiency…
Open calculatorEstimate the electricity cost of running a computer power supply by factoring in component power draw, PSU efficiency, daily usage, electricity rate,…
Open calculatorEstimate the electricity cost of a computer power supply unit based on average system draw, daily usage, electricity rate, PSU efficiency, and…
Open calculatorEstimate the electricity cost of running a computer based on average power draw, daily usage, electricity rate, and the number of days…
Open calculatorEstimate a computer's electricity use and cost based on component power draw, daily usage, operating days, electricity rate, and power supply efficiency.
Open calculatorEstimate how much it costs to run a desktop PC based on average power draw, daily usage, electricity rate, power supply efficiency,…
Open calculatorEstimate how much it costs to run a gaming PC based on average power draw during gaming, gaming hours per day, idle…
Open calculatorEstimate the electricity cost of running a computer based on power draw, daily usage, electricity rate, number of computers, and system type.
Open calculatorEstimate the recommended power supply wattage for a desktop PC based on CPU power, GPU power, number of storage drives, number of…
Open calculatorEstimate recommended power supply wattage for a desktop PC based on CPU power, GPU power, number of storage drives, cooling fans, and…
Open calculatorEach PC calculator is designed to keep the process short, understandable, and useful from the first input to the final result.
Choose the PC calculator that matches the question or decision in front of you.
Enter the few details needed for a result tailored to your situation.
Review the answer and supporting context, then move forward with more confidence.
A good PC calculator should do more than produce a number. It should make the inputs easy to understand, present the result clearly, and help you see what to do next.