Use this free calculator to estimate laptop, desktop and monitor energy together. Enter your power use and electricity rate to see the units, cost and formula.
Enter your details
Every input includes a simple explanation.
Private: the calculation runs in your browser. Your inputs are not sent to GharGanit.
Rated power can be different from average power while the appliance is running.
Voltage, automatic on-off cycling and equipment condition can change real use.
Use this as a budget estimate. The appliance label, how often it runs and all charges on your tariff determine the real bill.
Laptop, desktop and monitor inputs are added only when their entered values are non-zero, supporting several common work setups.
Use average workload power rather than only the power-supply rating and include external monitors or networking equipment separately.
A 650 W desktop power supply does not mean the computer continuously consumes 650 W.
Energy (kWh) = watts × quantity × hours × days × operating factor ÷ 1,000
Use average workload power rather than only the power-supply rating and include external monitors or networking equipment separately.
A 650 W desktop power supply does not mean the computer continuously consumes 650 W.
Use this as a budget estimate. The appliance label, how often it runs and all charges on your tariff determine the real bill.