ToolPronto
Sleep-time calculator
Plan possible bedtimes or wake times from configurable cycle and fall-asleep assumptions.
Sleep-time calculator
Plan possible bedtimes or wake times from configurable cycle and fall-asleep assumptions.
Your entries stay in this browser and are never included in analytics.
Times use your current time zone: UTC
First option
- Second option
- Jul 20, 2026, 7:12 AM
- Third option
- Jul 20, 2026, 8:42 AM
Candidate times
- 6 × 90 min: Jul 20, 2026, 5:42 AM
- 5 × 90 min: Jul 20, 2026, 7:12 AM
- 4 × 90 min: Jul 20, 2026, 8:42 AM
How it was calculated
t₀ − (N × 90 min) − 15 minSleep-time calculator
Plan possible bedtimes or wake times from configurable cycle and fall-asleep assumptions. Your entries stay in this browser and are never included in analytics. Sleep cycles vary. These times do not guarantee better sleep and are not medical guidance.
Sleep-time calculator — How it was calculated
- Explore suggested bedtimes for a planned wake-up time using sleep cycles.
- Explore possible wake-up times from a chosen bedtime and sleep latency.
- Compare cycle lengths without treating the suggestions as guaranteed rest.
How it was calculated
- Plan possible bedtimes or wake times from configurable cycle and fall-asleep assumptions.
- Your entries stay in this browser and are never included in analytics.
- Sleep cycles vary. These times do not guarantee better sleep and are not medical guidance.