The Workshop

Free sleep tools.

Science-backed calculators and trackers — no signup, no email, no BS. Use them as often as you like.

Sleep Edge Quiz

Answer four questions, get a personalized starting point — articles and tools matched to your specific problem.

Find the bedtime that lets you wake at the end of a 90-minute cycle — not in the middle of one.

Caffeine has a 5-hour half-life. Find the latest you can have a coffee without wrecking your deep sleep.