Sleep & Recovery
Circadian shift calculator
Estimate days needed to fully adjust to a new sleep schedule after travel, shift work, or a schedule change.
Your inputs
Results
Live result
Days to fully adjust
6.0 days
Direction
Eastward / earlier
Half-adjustment
3.0 days
Rough rule
1 hr/day
Medical disclaimer: This tool is for general educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health.
Related tools
These pair well with the circadian shift.
- Sleep CalculatorFind the optimal bedtime and wake time based on 90-minute sleep cycles so you wake up betwee…
- Sleep DebtTrack cumulative sleep debt across a 7-day week and see realistic recovery nights to clear i…
- BMI CalculatorFree BMI calculator with a visual chart, WHO category ranges, and context on what BMI actual…
- Calorie CalculatorCalculate your daily calorie needs (TDEE) using Mifflin-St Jeor with activity multipliers fo…
- Macro CalculatorCalculate protein, carbs, and fat in grams based on your calories and goal — cutting, mainta…
- Body Fat %Estimate body fat percentage from waist, neck, and hip measurements using the U.S. Navy circ…
Digital Dashboard Hub
Track BMI, calories, sleep, and wellness goals in one place
DDH has 54 health and wellness trackers — from daily habit logs to long-term health trends. No spreadsheets, no apps to sync. Free 14-day trial.
Try 54 wellness trackers free →