Fitness & Health Calculators
Use fitness, nutrition, and cycle-date estimators with clear methods and limitations. Results are general information, not diagnosis or individualized medical advice.
BMI Calculator
Calculate BMI and view the standard adult screening categories.
Calorie Deficit Calculator
Compare estimated maintenance calories with daily intake.
Calorie Calculator
Estimate your daily calorie needs for weight loss, maintenance, or weight gain.
Body Fat Calculator
Estimate your body fat percentage using body measurements and formulas.
BMR Calculator
Calculate your Basal Metabolic Rate and daily resting calorie expenditure.
Ideal Weight Calculator
Compare estimated reference-weight ranges from commonly used formulas.
Pace Calculator
Calculate your running pace, finish time, and average speed easily.
Target Heart Rate Calculator
Calculate your aerobic training zones and maximum heart rate limits.
Water Intake Calculator
View an illustrative daily fluid estimate based on weight and selected activity.
Macro Calculator
Calculate your daily protein, carb, and fat distribution goals easily.
Pregnancy Calculator
Calculate your estimated due date and current gestational age.
Pregnancy Weight Gain Calculator
Estimate healthy weight gain ranges during pregnancy based on pre-pregnancy BMI.
Pregnancy Conception Calculator
Estimate a possible conception date from a due date or last menstrual period.
Due Date Calculator
Estimate a possible due date from a last menstrual period and cycle-length input.
Ovulation Calculator
View a calendar-based ovulation estimate using cycle length.
Period Calculator
View calendar-based estimates for upcoming period dates and a possible fertile window.