Turn an appliance’s wattage and run time into the energy it uses and what it costs to run — per day, week and year at your electricity tariff.
Doing an energy assessment for a client? traqR turns your findings into a tidy quote and report you can send on the spot.
Start free trialPower in watts divided by 1,000 gives kilowatts. Multiply by the hours it runs to get kilowatt-hours (kWh) — the unit you’re billed on.
Multiply the daily energy by the days per week and weeks per year to get total annual consumption for the appliance.
Multiply kWh by your electricity rate (cents per kWh) to turn energy use into a dollar cost per day, week and year.
Multiply its power (kW) by the hours it runs to get kilowatt-hours, then multiply by your electricity tariff. For example, a 2,400 W tool run 6 hours a day uses 14.4 kWh — about $4.61 a day at 32c per kWh.
On the compliance or nameplate label, usually near the power inlet, or in the manual. If only amps and volts are shown, multiply them (W = V × A). For motors and heaters the running wattage may differ from the peak start-up draw.
Use the usage (consumption) rate from your electricity bill in cents per kWh — commonly 25–40c in Australia, though it varies by retailer, plan and time of use. Don’t forget that time-of-use plans charge more in peak periods.
No — this calculates power while the appliance is actively running. Many devices also draw standby power around the clock, which can add up across a workshop or office. For those, estimate the standby watts running 24/7 separately.
This calculator is a general estimate. Actual energy use varies with load, duty cycle, standby draw and appliance condition, and tariffs vary by retailer and time of use. Use nameplate figures and your own tariff for the closest result.
Doing an energy assessment for a client? traqR turns your findings into a tidy quote and report. Try it free for 14 days.