Bernard Ryan

Chronotype Calculator Discover your natural chronotype using the Munich Chronotype Questionnaire (MCTQ) approach. Find out if you’re a night owl, early bird, or somewhere in between based on your natural sleep patterns. How many days per week do you work? days Your work days are days with social obligations that affect your sleep schedule. Work … Read more

Caffeine Half-Life Calculator Calculate how caffeine is metabolized by your body over time, and discover when it’s safe to sleep without affecting your sleep quality. Note: This calculator uses the half-life formula C(t) = C₀ * (1/2)^(t/h) to estimate the amount of caffeine remaining in your system over time. The average half-life for caffeine is … Read more

Sleep Efficiency Calculator Calculate your sleep efficiency to better understand your sleep quality and make improvements to your sleep schedule. Note: This calculator uses the Duration of Sleep Episode (DSE) formula for more accurate sleep efficiency calculation: SE = TST / DSE (× 100), where DSE includes only time spent attempting to sleep, not other … Read more

Ideal Bedtime Calculator Find your perfect bedtime based on sleep science. Wake up refreshed by aligning with your natural sleep cycles and age-specific recommendations. Your age group: Infant (0-12 months)Toddler (1-2 years)Preschooler (3-5 years)School-age (6-12 years)Teenager (13-18 years)Adult (18+ years) What time do you need to wake up? How long does it typically take you … Read more

Sleep Debt Calculator Track your sleep debt by comparing your ideal sleep needs with your actual sleep hours. Find out if you’re getting enough rest or accumulating sleep debt. How many hours of sleep do you need per night? hours Most adults need 7-9 hours of sleep per night. Adjust based on your personal needs. … Read more

Ideal Body Weight Calculator Calculate your Ideal Body Weight (IBW), Adjusted Ideal Body Weight, and Body Mass Index (BMI) based on your height, weight, and gender. Unit System: Metric (kg, cm) Imperial (lb, ft/in) Gender: MaleFemale Height: cm Current Weight: kg Height: ft in Current Weight: lb Calculate Clear BMI Categories & Health Implications Understanding … Read more

Pregnancy Due Date Calculator Calculate your expected delivery date (EDD) using one of three methods: Last Menstrual Period (LMP), Conception Date, or IVF Transfer Date. Calculation Method: Last Menstrual Period (LMP)Conception DateIVF Transfer Date First Day of Last Menstrual Period: Cycle Length (optional): days Conception Date: IVF Transfer Date: Embryo Stage: 3-Day Embryo5-Day Embryo (Blastocyst) … Read more

Calculate your daily calorie needs using the Harris-Benedict formula to maintain your current weight. Metric (kg, cm) Imperial (lbs, in) Male Female Age: years Activity Level: Basal Metabolic Rate (BMR)Sedentary: little or no exerciseLight: exercise 1-3 times/weekModerate: exercise 4-5 times/weekActive: daily exercise or intense exercise 3-4 times/weekVery Active: intense exercise 6-7 times/weekExtra Active: very intense … Read more

Calculate your Body Mass Index (BMI) to determine if you’re at a healthy weight. Metric (kg, cm) Imperial (lbs, in) Age: years Height: cm Weight: kg Height: ft in Weight: lbs Calculate BMI Clear What Your BMI Means BMI Classification <18.5 Underweight 18.5-24.9 Healthy Weight 25-29.9 Overweight 30-34.9 Obese (Class I) 35-39.9 Obese (Class II) … Read more

Find out when to go to sleep or wake up based on your preferred sleep duration. I want to know when to go to sleep I want to know when to wake up I need to wake up at: I want to sleep for: 0123456789101112131415161718192021222324 hours 0153045 minutes I want to go to bed at: … Read more