Wake-Up Time Calculator — Best Time to Wake Up

Enter your sleep time to find the best wake-up time based on 90-minute sleep cycles.

No signup required. Instant results.

When do you want to sleep?

Start time: --:--

Based on 4–6 full sleep cycles (90 minutes each).

If your sleep time already passed today, we assume you mean the next occurrence (e.g. tonight).

Need more options or planning tools?

Use the full sleep calculator for wake-time mode, sleep-now mode, and bedtime planning.

How are wake-up times calculated? We add 4, 5, or 6 full 90-minute cycles to your sleep start time, matching the bedtime mode on our main tool.

What time should I wake up if I go to bed now? Use the full calculator’s “If I sleep now” mode for that scenario.