3 free tools for questions people ask about electricity: how countries differ, what your own use emits, and when a grid is cleanest. Country figures are Ember annual statistics (mostly 2025); the hourly pattern comes from grid operator data and is kept apart from the Ember figures.
How do these countries differ?
Choose two to four of 215 countries and see generation, demand, demand per person, carbon intensity, low carbon share, the fuel mix and the trend since 2000 side by side. The address bar keeps your choice, so you can share it.
Data: Ember annual statistics, latest year per country (most often 2025).
Open the toolWhat is the carbon footprint of my electricity?
Enter a country and your home's yearly or monthly kWh, an electric car's distance and efficiency, or an appliance's power and hours. It returns kilograms of CO2 at that country's average carbon intensity (world average 459 gCO2/kWh in 2025), next to the cleanest and dirtiest large grids.
Data: Ember annual carbon intensity, 2025.
Open the toolWhen is electricity cleanest?
Pick one of 104 grid zones and see the typical low carbon share of generation for each hour of the local day, with the best and worst hours marked. It is a pattern from recent days, not a forecast.
Data: Grid operator hourly generation (EIA and ENTSO-E), latest complete days.
Open the tool