Health tools
Fitness and Health Calculators
Browse practical health, nutrition, pregnancy, fitness, and wellness calculators. Each tool uses a shared responsive calculator engine with formulas, copy controls, and structured data.
Body Composition
BMI Calculator
Calculate body mass index from height and weight.
Body Fat Calculator
Estimate body fat percentage from BMI, age, and sex.
Healthy Weight Calculator
Find a healthy weight range using BMI 18.5 to 24.9.
Anorexic BMI Calculator
Check BMI against a low BMI threshold.
Overweight Calculator
Estimate BMI category and weight above healthy BMI range.
Ideal Weight Calculator
Estimate ideal body weight with the Devine formula.
Army Body Fat Calculator
Estimate body fat using U.S. Army circumference method.
Lean Body Mass Calculator
Estimate lean body mass from height, weight, and sex.
Body Type Calculator
Estimate body-shape category from basic measurements.
Nutrition
Macro Calculator
Estimate daily protein, carbohydrate, and fat targets.
Carbohydrate Calculator
Estimate carbohydrate calories and grams from daily calories.
Protein Calculator
Estimate daily protein needs by body weight and activity.
Fat Intake Calculator
Estimate daily fat grams from calorie target and fat percentage.
Weight Watcher Points Calculator
Estimate food points from calories, sugar, saturated fat, and protein.
Pregnancy
Pregnancy Calculator
Estimate due date and pregnancy progress from last menstrual period.
Pregnancy Conception Calculator
Estimate conception date from due date or last menstrual period.
Conception Calculator
Estimate conception and fertile window dates.
Pregnancy Weight Gain Calculator
Estimate recommended pregnancy weight gain range by starting BMI.
Due Date Calculator
Estimate due date from last menstrual period.
Ovulation Calculator
Estimate ovulation date and fertile window.
Period Calculator
Estimate next period and cycle dates.
Fitness
Pace Calculator
Calculate running pace, speed, and finish time.
One Rep Max Calculator
Estimate one-repetition maximum from lifted weight and reps.
Calories Burned Calculator
Estimate calories burned from MET value, weight, and duration.
Target Heart Rate Calculator
Estimate target heart-rate zones by age and intensity.