Health Calculators
Free, science-backed tools to help you understand and improve your health — no account needed.
Sleep Calculator
Wake up refreshed, every day
Calculate the perfect bedtime or alarm based on complete 90-minute sleep cycles — the same method used by sleep scientists to minimise morning grogginess.
- 90-minute cycle science
- Bedtime & wake-up modes
- Optimal cycle recommendations
90 min
Sleep cycles
2
Modes
BMI Calculator
Know your healthy weight range
Calculate your Body Mass Index with an animated visual gauge, view your healthy weight range, and get science-backed health guidance — in both metric and imperial.
- Metric & imperial units
- Animated gauge meter
- Healthy weight range
2
Unit systems
4
Categories
Calorie Calculator
Find your daily calorie needs
Calculate your BMR and TDEE using three science-backed formulas. Get personalised calorie targets for fat loss, maintenance, or muscle gain — with full macro breakdown.
- 3 BMR formulas supported
- Macro donut chart
- Fat loss & muscle gain targets
3
BMR formulas
3
Goal modes
Body Fat Calculator
Understand your true body composition
Estimate body fat percentage using the U.S. Navy method with an animated visual bar, ACE category classification, ideal body fat by age, fat-to-lose target, and BMI comparison.
- U.S. Navy & Deurenberg formulas
- Animated body fat category bar
- Ideal BF% by age & fat-to-lose goal
2
Formulas
5
ACE categories
BMR Calculator
Your daily calorie planning tool
Calculate your Basal Metabolic Rate and see TDEE at all activity levels in an interactive table and bar chart. Includes goal calories, macro breakdown, and 3 BMR formula options.
- Interactive TDEE table (5 activity levels)
- 3 formulas: Mifflin, Harris-Benedict, Katch
- Goal calories + macro donut chart
3
Formulas
5
Activity levels
Ideal Weight Calculator
Compare 4 medical formulas side by side
Find your ideal weight using the Devine, Robinson, Miller, and Hamwi formulas. See a formula comparison table, bar chart, BMI healthy range, and optional weight position indicator.
- 4 formulas: Devine, Robinson, Miller, Hamwi
- Formula comparison table + bar chart
- BMI healthy range + weight zone indicator
4
Formulas
2
Visual charts
Pregnancy Calculator
Your complete pregnancy timeline planner
Calculate your due date from LMP, ultrasound, conception date, or IVF transfer. See current week, trimester, baby development by week, full 40-week milestone timeline, and recommended checkups.
- 5 input methods including IVF transfer
- Full 40-week milestone timeline
- Baby size, doctor visits & progress bar
5
Input modes
14
Milestones