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Sleep Calculator

Free sleep calculator to calculate wake time from bedtime. Instant results in your browser — no signup.

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Goal planner

Work backward from a target to the plan you need.

Your target

Start from the goal, then fill the constraints.

Results update when you click Calculate.

What you need to do

Required action to hit the target.

Suggested bedtime

85:00

Required to reach your target

Wake time − (cycles × 90 minutes)

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Recently used

Tools you open will show up here on this device — with your last inputs when available.

What this result means

Free sleep calculator to calculate wake time from bedtime. Instant results in your browser — no signup. Calculate wake time from bedtime using bedtime; cycle duration assumption. Result: suggested wake times.

Assumptions

  • Rule dependency: Assumption dependent.

How it works

Calculate wake time from bedtime using bedtime; cycle duration assumption. Result: suggested wake times.

Example

Example: “sleep cycle calculator”. Enter your values and click the button to get a result.

Frequently asked questions

What does this wake time from bedtime calculator do?+

It helps you calculate wake time from bedtime. Typical search: “sleep cycle calculator”.

How should I read the result?+

Calculate wake time from bedtime using bedtime; cycle duration assumption. Result: suggested wake times.