Sleep a little better tonight.
Simple, free tools for bedtime, naps, caffeine, sleep debt and soothing sounds. Everything runs on your device.
Sleep Calculator
Find the bedtime or wake-up time that lines up with your sleep cycles.
Nap Calculator
Pick a nap length and see when to set the alarm.
Caffeine Calculator
How much caffeine is still in you at bedtime, and your last-call time.
Sleep Debt Calculator
Add up a week of short nights and plan a realistic catch-up.
Bedtime Calculator
Age-based bedtime range for a given wake-up time.
White Noise & Sleep Sounds
Play white, pink, or brown noise, or rain, with a sleep timer.
A practical starting point
How to sleep better
Small changes to your schedule, caffeine timing, naps, and bedroom can make sleep easier to plan. Read our source-backed guide and choose a step to try tonight.
Why you can trust these tools
Private by design
All calculations happen in your browser. We never see the times or numbers you enter.
Clear about assumptions
Age ranges follow National Sleep Foundation recommendations; the 90-minute cycle is a rough planning average.
Honest about limits
These are estimates for everyday planning, not medical advice or a diagnosis.
Frequently asked questions
Is this medical advice?
No. For general information only. These tools are not medical advice and cannot diagnose or treat any condition. If you have persistent trouble sleeping, talk to a healthcare professional.
Do you collect the times or numbers I enter?
No. All calculations happen in your browser, so the times and numbers you enter never reach us. Our hosting provider may see standard connection logs.
Where do the bedtime age ranges come from?
The age ranges follow National Sleep Foundation recommendations. Individual needs vary, so treat them as a starting point.
Why does the sleep calculator use 90-minute cycles?
The 90-minute cycle is a rough planning average. Real cycle lengths and the time it takes you to fall asleep vary, so the suggested times are estimates.
Do I need an account, and does it cost anything?
No sign-up and no cost. The calculators and the white noise player are free, and nothing you enter is uploaded.