Free Health CalculatorMobile optimization

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Calculate everything from BMI, body fat, calories, and basal metabolic rate to fertile period, ovulation, pregnancy, and menstruation with just one click.

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🔥 The most searched calculator
Instantly check your BMI based on Korean standards, obesity level, and target weight.
⚖️ Go to BMI Calculator
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10 types
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Go to Health Calculator

Each calculator operates on an independent URL. Clicking a card will take you to the corresponding calculator.

🏋️ Body Composition · Weight Management
⚖️
🔥 #1 Popularity

BMI Calculator

Calculate the Body Mass Index based on height and weight, and check the obesity standard stages and target weight for Koreans.

Based on Korean standardsTarget weightBMI spectrum
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🎯
High search demand

Standard weight calculator

Calculate standard weight using the Broca formula, BMI formula, and Lorenz formula, and compare it to your current weight.

Broca OfficialBased on a BMI of 22Gender distinction
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📊
Body composition analysis

Body fat calculator

Calculate body fat percentage using BMI-based body fat percentage and the Navy formula (waist, neck, and hip circumference).

Body fat percentageNavy OfficialMuscle mass estimate
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Diet essentials

Calorie calculator

Calculates daily required calories based on activity level and recommended calorie intake based on target weight.

TDEE calculationActivity levelWeight loss/gain
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Exercise Basics

Basal Metabolic Rate Calculator

Calculate Basal Metabolic Rate (BMR) and Activity Metabolic Rate using the Harris-Benedict-Mifflin-St. George formula.

BMR calculation2 formulasActivity metabolic rate
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🌸 Women's Health · Pregnancy
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Pregnancy preparation

Fertility Calculator

If you enter your menstrual start date and cycle, it displays your next fertile period and dates with a high probability of fertility on a calendar.

fertile periodPregnancy probabilityCalendar display
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📅
🔥 Popular

Ovulation Calculator

If you enter your last menstrual period start date and cycle length, it automatically calculates the estimated ovulation date and fertile period.

Expected ovulation datePregnancy periodExpected next period
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🤰
Essential during pregnancy

Pregnancy Calculator

Calculate the due date (expected delivery date) and current gestational age by entering the last menstrual period or fertilization date.

due dategestational ageQ3 Classification
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📆
Weekly Fetal Development

Pregnancy Week Calculator

Check the accurate gestational age, days, trimester, and fetal development information based on the last menstrual period or ultrasound reference date.

Weeks of pregnancy · DaysFetal developmentQuarterly division
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Periodic Management

Period Calculator

Provides the next period due date, cycle calendar, and 6-month forecast based on the last period start date and cycle input.

Expected next period6-month predictionPeriodic analysis
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Why is a health calculator necessary?

Checking your health with numbers allows you to set clear goals. You can assess your current status with BMI and body fat, manage your diet with calories and basal metabolic rate, and use the women's health calculator to prepare for pregnancy and manage your health cycle.

Order of Using the Body Composition Calculator

  • Step 1: BMI Calculation Identify current obesity level and target weight
  • Step 2 Body Fat Measurement: Check for skinny fat
  • Step 3 Basal Metabolic Rate Calculation: Determine the minimum daily calorie expenditure
  • Step 4 Calorie Calculation: Daily calorie setting for target weight
💡 Beware of skinny fat: Even if your BMI is normal, a high body fat percentage poses a health risk. Please use a BMI and body fat calculator together.
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Frequently Asked Questions

What is the normal range for BMI?
According to the Korean Society for the Study of Obesity, the normal range for Koreans is a BMI of 18.5 to 22.9. A BMI of 23 or higher is classified as overweight, and 25 or higher is classified as obese. Stricter standards are applied compared to Western criteria (overweight for a BMI of 25 or higher).
What is basal metabolic rate?
Basal Metabolic Rate (BMR) is the minimum number of calories the body consumes to sustain life when in a resting state without doing anything. It varies depending on gender, age, height, and weight, and can be checked using a BMR calculator.
How do I calculate ovulation day?
If your menstrual cycle is 28 days, ovulation occurs 14 days before your next expected period. If your cycle is different, calculate it as 'next expected period – 14 days'. The ovulation calculator automatically calculates the date when you enter your last period start date and cycle length.
How do you count the weeks of pregnancy?
Pregnancy weeks are calculated starting from the first day of your last menstrual period. Since this is based on the first day of the last period rather than the date of conception, it is counted approximately two weeks before the actual conception. Please check the exact week and trimester using the pregnancy calculator.

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