Electricity Cost Calculator: Appliance Power Consumption Guide
Electricity cost depends on power draw, usage time, and your tariff. Estimating an appliance's running cost helps you cut waste and budget accurately.
Power, Time, and Cost
Cost equals power in kilowatts times hours used times the price per kWh. A 2 kW heater running 3 hours at ¥0.6/kWh costs about ¥3.6 per day. The calculator does this for any device.
Finding an Appliance's Wattage
Check the label or manual for watts. Common references: a fridge runs 100-200 W, a laptop 50-90 W, and an air conditioner often 1-2.5 kW while cooling.
Standby Power Adds Up
Devices left on standby still draw a little power 24/7. A few watts across many devices can equal a full appliance running a couple of hours a day.
Cutting the Bill
Shift heavy loads to off-peak hours if your tariff is time-of-use, unplug rarely used devices, and prioritize efficient replacements for items you use daily.
Appliances Ranked by Running Cost
The biggest costs usually come from heating and cooling: air conditioners, water heaters, space heaters, and electric ovens. Small electronics cost little individually but add up when used daily.
Rank your own devices with the calculator and target the top three for changes first. Fixing the biggest consumers delivers most of the savings with the least effort.
How to Estimate an Appliance's Cost
- Find the wattage on the appliance label or manual.
- Enter the power, the hours you use it per day, and your price per kWh.
- Read the daily and monthly estimates, then rank your appliances by cost.
Use your real usage pattern rather than the rated maximum—an air conditioner running intermittently costs far less than one running flat out.
Quick tip: revisit your estimate each season. Heating and cooling dominate costs, so the ranking of your appliances shifts between summer and winter.
Online 🧮 Electricity Cost Calculator
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