Home › Health & Fitness Calculators

💪 Health & Fitness Calculators

BMI, calories, sleep cycles, ideal weight, body fat, hydration, and more. All free, all instant, no sign-up required.

⚖️Popular
BMI Calculator
Check your body mass index from height and weight.
 🔥Popular
Calorie Calculator
Daily calorie needs based on your age, weight, and activity level.
 😴Popular
Sleep Calculator
Find your best bedtime or wake-up time based on sleep cycles.
 🎯
Ideal Weight Calculator
Estimated healthy weight range based on height and gender.
 📏
Body Fat Calculator
Estimate body fat percentage using body measurements.
 ⚡
BMR Calculator
Basal metabolic rate: calories burned at rest.
 🏃
Pace Calculator
Running pace, finish time, or distance from any two values.
 💧
Water Intake Calculator
Daily hydration goal based on weight and activity.
 🤰
Pregnancy Calculator
Estimated due date from last menstrual period.
 📅
Due Date Calculator
When is your baby due? Enter your LMP or conception date.
 🎂
Age Calculator
Your exact age in years, months, and days.
 💪
Protein Calculator
Daily protein target based on weight and fitness goals.
 🏋️
One Rep Max Calculator
Estimate your 1RM from a recent lift and rep count.
 ❤️
Target Heart Rate Calculator
Safe and effective heart rate zones for cardio exercise.
 🚴
Calories Burned Calculator
Calories burned by activity type, duration, and weight.
 ✅
Healthy Weight Calculator
Healthy weight range based on height using WHO guidelines.
 📈
Pregnancy Weight Gain Calculator
Recommended weight gain during pregnancy by trimester.
 🌸
Ovulation Calculator
Estimate your most fertile days based on your cycle.
 🧬
Body Surface Area Calculator
BSA calculation used in medical dosing and clinical settings.
 🥑
Fat Intake Calculator
Daily fat intake range based on calorie goals.