Professional analysis of BMI, Ideal Weight, and Daily Calorie Needs
Calculate Your Metrics
Male
Female
Required for BMR and Ideal Weight formulas.
Please enter a valid age (18-100).
Feet and Inches
Please enter a valid weight.
Sedentary (little or no exercise)
Lightly active (exercise 1-3 days/week)
Moderately active (exercise 3-5 days/week)
Very active (exercise 6-7 days/week)
Super active (physical job or training 2x/day)
Used to calculate TDEE (Total Daily Energy Expenditure).
Your Body Mass Index (BMI)
25.1
Overweight
Formula: Weight (kg) / Height (m)²
Ideal Weight Range
144 – 176 lbs
BMR (Resting Calories)
1,750 kcal
Maintenance Calories (TDEE)
2,406 kcal
Weight Analysis Table
Category
BMI Range
Weight Range (lbs)
This table shows the weight boundaries for different BMI categories based on your height.
Chart: Comparison of your current weight vs. ideal healthy weight range.
What is My Weight Calculator?
The my weight calculator is a comprehensive digital tool designed to help individuals assess their body composition and nutritional needs. Unlike simple scales that only provide a single number, this calculator integrates multiple physiological metrics—including Body Mass Index (BMI), Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE)—to provide a holistic view of your health status.
This tool is essential for anyone looking to maintain a healthy lifestyle, lose weight sustainably, or gain muscle mass. By inputting variables such as age, gender, height, weight, and activity level, the calculator derives personalized data points that serve as a foundation for dietary and fitness planning.
Common misconceptions about weight often stem from relying solely on one metric. For instance, a bodybuilder might have a high BMI but low body fat. Therefore, this calculator provides a range of outputs to help you interpret "my weight" in a medical and functional context.
My Weight Calculator Formula and Mathematical Explanation
To accurately determine your health metrics, this calculator utilizes several scientifically validated formulas. Understanding the math behind "my weight calculator" empowers you to make better health decisions.
1. Body Mass Index (BMI)
BMI is a screening tool used to categorize weight. The formula is:
BMI = Weight (kg) / (Height (m))²
2. Ideal Body Weight (Devine Formula)
This formula estimates a healthy weight based on height and gender. It is widely used in medical dosing and nutritional assessments.
Men: 50 kg + 2.3 kg × (Height in inches – 60) Women: 45.5 kg + 2.3 kg × (Height in inches – 60)
3. Basal Metabolic Rate (Mifflin-St Jeor)
This calculates the energy your body needs to function at rest (breathing, circulation, cell production).
Men: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5 Women: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
Variables Table
Variable
Meaning
Unit
Typical Range
BMI
Body Mass Index
kg/m²
18.5 – 24.9 (Normal)
BMR
Basal Metabolic Rate
kcal/day
1,200 – 2,500
TDEE
Total Daily Energy Expenditure
kcal/day
1,500 – 3,500
Practical Examples (Real-World Use Cases)
Example 1: Weight Loss Planning
Scenario: Michael is a 35-year-old male, 5'10" (178 cm), weighing 210 lbs (95 kg). He works a desk job (Sedentary).
Input: Male, 35, 5'10", 210 lbs, Sedentary.
BMI Result: 30.1 (Obese Class I).
BMR: ~1,950 kcal/day.
TDEE: ~2,340 kcal/day.
Interpretation: To lose weight, Michael needs to eat below his TDEE. A 500-calorie deficit (eating ~1,840 kcal/day) would result in approximately 1 lb of weight loss per week.
Example 2: Maintenance for Active Lifestyle
Scenario: Sarah is a 28-year-old female, 5'5″ (165 cm), weighing 135 lbs (61 kg). She exercises 4 days a week (Moderately Active).
Interpretation: Sarah is at a healthy weight. To maintain her physique and performance, she should consume approximately 2,150 calories daily.
How to Use This My Weight Calculator
Select Your Unit System: Choose between Imperial (lbs/ft/in) or Metric (kg/cm) at the top of the calculator.
Enter Personal Details: Input your gender and age. These are crucial for the BMR calculation as metabolism slows with age and varies by gender.
Input Height and Weight: Be as accurate as possible. For height, stand against a wall without shoes. For weight, weigh yourself in the morning before eating.
Choose Activity Level: Be honest about your physical activity. Overestimating activity can lead to a recommended calorie intake that prevents weight loss.
Analyze Results:
Check your BMI to see your general category.
Review the Ideal Weight Range to set long-term goals.
Use the TDEE as your daily calorie budget.
Key Factors That Affect My Weight Calculator Results
While the my weight calculator provides excellent estimates, several biological and environmental factors influence the actual numbers:
Muscle Mass: Muscle tissue is denser than fat. Athletes may register as "Overweight" by BMI standards despite having low body fat. The calculator cannot distinguish between muscle and fat weight.
Age: Metabolic rate decreases by about 2% per decade after age 20. This means older individuals require fewer calories to maintain the same weight.
Gender: Men typically have more lean muscle mass and a higher BMR than women of the same weight and height.
Genetics: Genetic factors influence body frame size (small, medium, large). The "Ideal Weight" formula assumes a medium frame; small-framed individuals might aim for the lower end, while large-framed individuals might aim higher.
Hydration Levels: Water weight can fluctuate by 2-5 lbs daily. This affects your "Current Weight" input but not your actual fat mass.
Hormonal Health: Conditions like hypothyroidism or PCOS can lower BMR below the calculated estimate, making weight loss harder than the math suggests.
Frequently Asked Questions (FAQ)
Is BMI accurate for everyone?
No. BMI is a general screening tool. It is less accurate for athletes with high muscle mass, pregnant women, and the elderly. It does not measure body fat directly.
How often should I check my weight calculator results?
It is recommended to recalculate every time you lose or gain 5-10 lbs, or if your activity level changes significantly. Your calorie needs change as your body weight changes.
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories you burn doing nothing (sleeping). TDEE (Total Daily Energy Expenditure) adds the calories burned through movement and exercise to your BMR.
Why is my ideal weight range so wide?
The range accounts for differences in body frame size and muscle composition. A healthy weight is not a single number but a range where risk of disease is minimized.
Can I use this calculator for children?
No. This calculator uses adult formulas. Children and teenagers require specialized growth charts (percentiles) used by pediatricians.
Does this calculator account for pregnancy?
No. Pregnancy requires specific weight gain guidelines. Please consult an obstetrician for personalized advice.
What is a safe rate of weight loss?
Generally, 1-2 lbs (0.5-1 kg) per week is considered safe and sustainable. This requires a deficit of 500-1000 calories per day.
Why do I weigh more than the ideal weight but look thin?
You may have high bone density or muscle mass ("skinny fat" or athletic build). Focus on body composition and how you feel rather than just the scale number.
Related Tools and Internal Resources
Explore our other health and fitness tools to further optimize your lifestyle:
BMI Calculator – A dedicated tool focusing strictly on Body Mass Index categories and health risks.
Calorie Deficit Calculator – Calculate exactly how much to eat to reach your weight loss goals by a specific date.
BMR Calculator – Deep dive into your resting metabolism and how to boost it.