The Watt Book
What your home's energy costs, worked out
How many watts, how many kilowatt-hours, and what that costs at your rate: plain guides with calculators you can check. Every guide cites its sources, and our editor reads each one before we publish.
Sourced
Each guide links to the government agencies, labs and makers it draws on.
Edited
Our editor reads and approves every guide before it goes live.
Plain
Short answers first, in everyday words. No hype and no miracle claims.
Our first guides are on the way
Our editor reads every guide before it goes live. The first ones are being written now. Check back soon.
Browse by topic
Generators and Backup Power
How to size a generator or battery for an outage, and run it safely.
Coming soon
Running Costs
What your appliances and devices cost to run, worked out with your own rate.
Coming soon