Category
Health Calculators
Everyday health and fitness estimators with clear formulas and plain-language notes.
BMI Calculator
Calculate body mass index from height and weight.
Calorie Calculator
Estimate BMR, maintenance calories, and a simple weight-loss target.
Body Fat Calculator
Estimate body fat percentage using circumference measurements.
Pace Calculator
Calculate running pace, total minutes, and speed.
Cycle Calculator
Estimate the next cycle date from a start date and cycle length.
Cycle-Based Fitness Planner
Estimate a planning date from a cycle start and an editable day offset.
Cycle-Based Wellness Planner
Estimate a wellness planning date from a cycle start and an editable day offset.
Pregnancy Date Calculator
Estimate a due date from a last-period date using an editable day offset.
Pregnancy Weight Calculator
Compare current pregnancy weight gain with an editable target range.
Conception Date Calculator
Estimate a conception date from a due date with an editable offset.
Premature Baby Corrected Age Calculator
Estimate corrected age in weeks from chronological age and weeks early.
28-Day Cycle Care Planner
Plan a 28-day cycle milestone from a start date and editable offset.
Body Shape Calculator
Estimate waist-to-hip and waist-to-height ratios.
Target Heart Rate Calculator
Estimate maximum heart rate and training zone from age and intensity.
Exercise Calories Calculator
Estimate calories burned from MET, weight, and duration.
Water Intake Calculator
Estimate daily water intake from body weight.
Waist-To-Hip Ratio Calculator
Calculate waist-to-hip ratio from body measurements.
Running Calories Calculator
Estimate running calories from weight and distance.
Blood Alcohol Calculator
Estimate BAC with editable drink, body-water, and metabolism assumptions.
Smoking Cost Calculator
Estimate smoking cost over days, months, and years.
Sleep Cycle Calculator
Estimate sleep duration from sleep cycles and minutes per cycle.
Child Height Prediction Calculator
Estimate child adult height from parent heights with an editable offset.