Health & Fitness Calculators
Free health and fitness calculators to help you track body composition, plan nutrition, and reach your wellness goals.
BMI Calculator
Calculate your Body Mass Index (BMI) using your height and weight. Supports both imperial and metric units with color-coded health category results.
Calorie Deficit Calculator
Calculate your daily calorie needs and optimal deficit for weight loss. Uses the Mifflin-St Jeor equation with your activity level to find your TDEE and target intake.
Macro Calculator
Calculate your ideal daily macronutrient split for protein, carbs, and fat. Choose from balanced, low-carb, keto, or high-protein diet profiles based on your calorie target.
TDEE Calculator
Calculate your Total Daily Energy Expenditure. Find out how many calories you burn per day based on your body stats and activity level using the Mifflin-St Jeor equation.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method. Enter simple body measurements to get your body fat category and lean mass estimate.
Pregnancy Due Date Calculator
Calculate your estimated due date and track your pregnancy timeline. Enter your last menstrual period to see your due date, current week, and trimester milestones.
BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at rest. See daily calorie needs at different activity levels using the Mifflin-St Jeor equation.
Dog Age Calculator
Convert your dog's age to human years using the latest veterinary science. Results account for your dog's size, since smaller breeds age more slowly than larger ones.
Running Pace Calculator
Calculate your running pace, distance, or finish time. Enter any two values and the calculator will solve for the third. Perfect for planning race goals or tracking training runs.
Sleep Calculator
Find the ideal time to go to sleep or wake up based on 90-minute sleep cycles. Wake up at the end of a cycle to feel refreshed instead of groggy.
Water Intake Calculator
Find out how much water you should drink daily based on your weight, activity level, and climate. Get your personalized hydration goal in liters, ounces, and cups.