Questions

Short answers, worked out from the same figures the calculator uses. Each one shows how I got there.

• How much energy does a ChatGPT prompt use?

  About 0.3 Wh to answer, 0.5 Wh with its share of training.

• How much water does ChatGPT use?

  About 2.20 mL a prompt, for cooling and at the power plants.

• What is the footprint of an hour of Netflix?

  About 57 g of CO₂e an hour, for the data centers and networks.

• What is the footprint of Claude Code and other AI coding agents?

  About 120 Wh an hour, or 157 g of CO₂e.

Every factor and source is on How it's calculated. Measure your own use.