Nap Planner
Free online nap planner that runs entirely in your browser.
How the Nap Planner works
The Nap Planner works on Time you lie down (HH:MM), Minutes to fall asleep and shows the result as you type. The same input always gives the same answer — refresh the page and you will see exactly the same figure, and nothing you type is sent anywhere.
Formula used
Nap Planner is computed by the formula below, using the inputs you provide.
Inputs used: Time you lie down (HH:MM), Minutes to fall asleep.
Worked example
Take the default example — time you lie down (hh:mm) of 14:30, minutes to fall asleep of 12:
- Power-nap wake time: 15:02
- Asleep by: 14:42
- Full-cycle wake time: 16:12
- list: Power nap (20 min sleep): wake at 15:02 — wake before deep sleep — quick refresh, no grogginess, One cycle (90 min sleep): wake at 16:12 — full cycle — memory + creativity boost, Two cycles (180 min sleep): wake at 17:42 — deep recovery — only if the evening allows
Frequently asked questions
- Is the Nap Planner free?
- Yes. There is no signup, no usage limit and no watermark — the calculator runs entirely in your browser.
- Does the Nap Planner store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.
- What inputs does the Nap Planner need?
- Time you lie down (HH:MM), Minutes to fall asleep. Change any of them and the result updates instantly.