Lifestyle Calculators
6 free calculators
Everyday wellness and lifestyle calculators.
Sleep Cycle Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycle science.
90-min cycle × n + 15 min fall-asleep time
Age Calculator
Calculate exact age in years, months, days, and more from a birth date.
Date difference calculation
Caffeine Calculator
Calculate safe daily caffeine limits and estimate how long caffeine stays in your system.
Safe limit: 3–6mg/kg · Half-life: ~5–6 hours
Pregnancy Due Date Calculator
Calculate your estimated due date from your last menstrual period or conception date.
Naegele's Rule: LMP + 280 days
Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on pre-pregnancy BMI using IOM guidelines.
IOM pregnancy weight gain guidelines
Sleep Calculator
Calculate the best times to fall asleep or wake up based on 90-minute sleep cycles. Wake at the right point to feel dramatically more refreshed.
Bedtime = wake time – (N × 90 min) – 14 min
Optimize Your Daily Lifestyle
Health is not just about diet and exercise — lifestyle factors like sleep quality and understanding your body over time play equally important roles. Our lifestyle calculators help you optimize these often-overlooked aspects of wellbeing.
Use the Sleep Cycle Calculator to transform your mornings by waking up at the perfect time in your sleep cycle. Use the Age Calculator for health assessments, medication tracking, or simply to appreciate how far you've come on your health journey.
🍽️ Related Meal Plans
Put your numbers into action with these free 7-day meal plans.