PC Power Calculator
Add up what your PC's components draw, and see the supply capacity that total suggests.
Computers & Laptops tools
PC and PSU power, laptop battery and charging, UPS sizing, RAM, storage, data transfer and running cost - worked from the specifications of the hardware you actually have rather than from a table of guesses.
Gaming PC Power Calculator
What a gaming build draws and the supply capacity it suggests, from the specifications of the parts you are actually…
PSU Wattage Calculator
The power supply capacity a system needs, from its load and the headroom you want above it.
PC Power Supply Load Calculator
What percentage of its rating your power supply is carrying, and how much capacity is left.
PSU Headroom Calculator
How much of your power supply is spare, in watts and as a percentage.
PSU Efficiency Calculator
Measured power supply efficiency from the wall reading and the DC output, with the losses in watts.
PC Electricity Cost Calculator
What a desktop costs to run per day, month and year, at your own electricity rate.
Gaming PC Electricity Cost Calculator
What a gaming PC adds to the bill, from the power it draws while you are actually playing.
Gaming Session Cost Calculator
Energy used and what it costs for a single session, from a power draw and a duration.
Computer Running Cost Calculator
What a computer costs to keep: electricity worked out for you, plus the maintenance, software and replacement costs you…
PC Cost Per Hour Calculator
What an hour of running a computer costs, in electricity and anything else you count.
Laptop Power Consumption Calculator
How much energy a laptop uses over a working day, and what it costs if you add your rate.
Laptop Electricity Cost Calculator
What a laptop costs to run per day, month and year at your own electricity rate.
Laptop Battery Runtime Calculator
How long a laptop battery lasts, from its watt-hours and the power the machine is actually drawing.
Laptop Battery Capacity Calculator
Watt-hours, amp-hours and milliamp-hours for a laptop battery, from its voltage and capacity.
Laptop Charging Time Calculator
How long a laptop battery takes to charge, with the slowdown above 80% accounted for rather than ignored.
Laptop Charging Cost Calculator
What one laptop charge costs and what that comes to over a month, counting the energy the meter sees.
Monitor Power Calculator
Total power for your monitors, from the wattage on their own labels.
Multi-Monitor Power Calculator
Add up the power of a multi-monitor setup, each display on its own row.
Monitor Electricity Cost Calculator
What your monitors cost to run per month and year, at your own electricity rate.
UPS Capacity Calculator
The UPS rating a load needs, in both VA and watts - because a unit has to satisfy both limits.
Computer UPS Runtime Calculator
How many minutes a UPS will hold your computer up, from its battery and the load it is carrying.
UPS Battery Capacity Calculator
The battery capacity in ampere-hours a given load and backup time would need.
UPS Charging Cost Calculator
What recharging a UPS battery costs after an outage, and over a month of them.
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