Description Methodology Change log
This tool was built by Hannah Ritchie , with the help of Claude Code.
Add and remove products or activities in the sidebar to compare them on the chart. Most have the option of adjusting the number of hours used, miles driven, or other units of usage.
Actual energy consumption will vary a lot depending on factors such as the age and efficiency of the product, how you're using it (for example, how warm your showers are, or how fast you drive), weather and climate conditions (which is particularly important for the energy usage of heaters and air conditioners).
These numbers represent typical products and usage (specifically for the UK, although it will often generalise elsewhere), and might not reflect your own personal circumstances. If you want to get precise measurements, you will need to use dedicated energy monitoring equipment.
This tool was designed to get a sense of the differences in energy consumption between different products. It's often difficult to understand whether activities matter a lot or very little for our overall energy consumption.
Methodology and Sources for Energy Consumption Estimates
1. General Methodology
All energy consumption values in this tool are measured in watt-hours (Wh), which is the amount of energy consumed over time. The basic formula for calculating energy consumption is:
Energy (Wh) = Power (Watts) × Time (Hours)
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