Energy
Home Energy Audit and Efficiency Calculator
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22 Oct 2025
About this Tool
The Home Energy Audit Calculator helps you track electricity usage, compare efficiency, and find potential savings. Calculate the annual operating cost for any appliance using presets (including various TV sizes, ovens, and heaters), estimate savings from switching to LED lights, and uncover hidden costs from standby power (phantom load). Supports both UK Pounds (£) and US Dollars ($).
Tool
Home Energy Audit
Calculate usage, identify waste, and find potential savings.
£
/ kWh
Enter the cost you pay for 1 kilowatt-hour of electricity.
Calculate the yearly operating cost for a device. Select a preset or customize the values below.
Current Usage Inputs (Editable Below):
Adjust any of the pre-filled values to match your actual usage.
Annual Operating Cost
Based on your inputs and rate.See how much you can save by replacing old incandescent or CFL bulbs with modern LEDs.
Estimated Annual Savings
This savings is realized every year.Estimate the cost of devices that are "off" but still plugged in (e.g., TV, game consoles, chargers).
Think TVs, modems, phone chargers, etc.
Typically 1W to 5W per device.
Estimated Annual Phantom Cost
Savings can be achieved by using power strips.Advertisement