Sleep Calculator - Sleep Cycle Optimizer

Calculate optimal sleep and wake times based on 90-minute sleep cycles. Wake up feeling refreshed by timing your sleep to match your body's natural rhythm.

When are you going to bed?

Enter your bedtime and we'll calculate the best wake times based on 90-minute sleep cycles.

Baby Mode

Show wake window recommendations by age

Disclaimer: This sleep calculator is provided as-is for informational purposes only and is not a substitute for professional medical advice. Sleep needs vary by individual. Consult a healthcare provider for persistent sleep issues.