Save Electricity Calculator

Where is energy being wasted in your home now?
How much electricity and money can be saved? Calculate what you can save here.
In 5 minutes you could learn to have savings of $100s or $1000s every year and help the environment.

Fill in the sections where you can make changes to save electricity. Click on Get Results buttons to find out your savings. See electricity saved, money saved, water saved and CO2 reduction. A detailed results area shows where you should concentrate your energy efficiency efforts.
Conserve power ideas

Description Quantity

Power Cost in Dollars (or local currency) per kWh example 0.16

Off Peak Power Cost in Dollars (or local currency) per kWh example 0.10

Year Electricity Cost in Dollars (or local currency) example 1600

Total New Lighting hours per day using Compact Fluorescent Lights.Total = Light 1 x hours + Light 2 x hours ... Also consider replacing halogen lights fittings for miniature CFL (this requires an electrician)

Bedroom air conditioners now running on off peak electricity tariff. Total number of air conditioners changed over.

Surplus fridges are turned off. Number of fridges turned off for the majority of the year.

Now pool / pond / spa pump set on timer. Enter value of hours per day now in use. Yearly timer average is acceptable.

Now washing machine set to use cold water only. Click in box if cold water washing is taken up.

Water Efficient Shower Heads fitted. Showers per day using water efficient shower heads. Try to limit showers to 4 minutes.

Water Efficient Tap Aerators fitted. Minutes per day using new taps. Fix any tap leaks promptly.

Computer/s now has Computer Power Management enabled. E.g. S3 Sleep or Hibernation if idle for 30 minutes. Number of computers.

Laptop/s now has Computer Power Management enabled (in battery and mains power modes). Number of laptops.

Peripherals are turned off at the wall when computer is off. E.g. Printer, scanner, speakers, external hard drive. Foot controlled power boards are available. USB controlled power boards only power up when the computer is on.

New Insulation fitted on ceiling to local recommended standards. Click in checkbox if insulation is planned or completed.

Heated or cooled rooms are sealed. Chimney flues closed when not in use. Doors closed to reduce volume being conditioned. Draft Stoppers fitted to door, windows sealed, exhaust fans have seals when not in use. Click in checkbox if activity is planned or recently completed.

Playstation 3 is turned off at the wall when not in use. 4 button remote controlled power boards are available suitable for entertainment equipment.

Xbox 360 is turned off at the wall when not in use.

Hifi is turned off at the wall when not in use.

DVD or Blue Ray player is turned off at the wall when not in use.

Press button after completing or adjusting fields in the top table.

Local links: Homepage , Energy Efficiency Section , Energy Calculators , Energy Efficient Home Checklist
Save Electricity for Business Calculator , Efficiency eBook

Save Electricity Calculator Strategy


Look at the detailed results.
Which electricity saving activities should be completed first?
More accuracy can be made using the specialised Energy Calculators.
Affordable energy meters are available for power points and buildings.
See reviews in Energy Efficiency section.
Review the Energy Efficient Home Checklist to find out other saving ideas.

Single Power point meter Single Phase Building Power meter

Save Electricity Calculator Yearly Results

Power Saved kWh

Money Saved $$$

Water saved in litres

Carbon Footprint reduced CO2 kg

How much does the Save Electricity Calculator potentially help you?

electricity use

Save Electricity Calculator Detailed Yearly Results

Save Electricity Calculator Assumptions

Compact Fluorescent light uses 13 watts. Incandescent light was using 75 watts. See Light Energy Calculator for more information.
Bedroom air conditioner uses 900 watts and is running the compressor at 50% duty cycle. Assume 4 months use each year.
Each surplus fridge uses 700 kWh of energy in a year.
Pump uses 1000 watts.
Washing machine uses 100 litres of hot water per load. Washing machine used for 4 loads each week. Each litre of water takes 0.052 kWh to heat.
Water efficient shower head uses 9 litres per minute. Old shower head uses 20 litres per minute. Average Shower lasts for 5 minutes. Shower is using 50% hot water.
Water efficient tap aerator uses 5 litres per minute. Old taps uses 20 litres per minute. Tap is running 50% hot water.
Computer power management enabled reduces computer power consumption by up to 38%. Computer uses 200 watts when on. Assume computer is left on.
Laptop uses 50 watts when on. Assume laptop is left on. See Computer Energy Calculator for more information.
Computer peripherals even in standby consume power. Assume 30 watts total standby unless switched off at the wall.
Insulation can reduce cooling and heating costs by up to 30%. Assume 40% of electricity used is for heating or cooling.
Up to 30% more in heating and cooling energy can be saved with simple draft stopping practices.
Playstation 3 will use approximately 190 watts when on or on standby. It is best to turn this device off at the wall. See Appliance Energy Calculator for more information.
Xbox 360 will use approximately 150 watts when on or on standby. It is beat to turn this device off at the wall.
Hifi will use approximately 30 watts on standby for these calculations (it can be higher). It is best to turn this device off at the wall.
DVD or Blue Ray will use approximately 20 watts when on or on standby. It is best to turn this device off at the wall.
Carbon footprint based on 1 kWh makes 1 kg of CO2 from a coal thermal electricity plant.

Saving Electricity Further Considerations

Do you feel more savings could be achieved?
Consider having all halogen lights to be replaced with either LED lights or replacing the fitting for a miniature compact fluorescent light. Save 80 to 88% in power.
Can electronic ballasts be fitted to fluorescent tube lights and save up to 33% in power? See Light Energy Calculator
Is your fridge or freezer over 10 years old? Efficiency of these appliances have improved over time. Can a single larger fridge/freezer replace many smaller fridges?
Consider altering pool pump hours per day relative to the seasons and needs.
Can task lighting be used instead of general room lighting?
Can air conditioned or heated areas be segmented to reduce volume and energy consumption.
Can countdown timers be used for various appliances including air conditioners?
Can reverse cycle air conditioning be used instead of electric element heating devices?
Can solar hot water be introduced? See Solar Hot Water Calculator
Can solar power be introduced? See Solar Power Calculator

To get a better understanding of energy consumption requires real time measurement.
Power point energy meters can be bought for $25.
Building energy meters can be bought for $100 (3 phase are $150).
Examples of these devices are reviewed in the Energy Efficiency Section

power changes up or down

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