Ideal Weight Calculator
Calculate your ideal body weight using multiple scientific formulas.
Your Information
Enter your height to calculate ideal weight
About These Formulas
Robinson (1983): Most widely used in medical practice
Miller (1983): Similar approach with refined coefficients
Devine (1974): Commonly used for drug dosage calculations
Hamwi (1964): One of the earliest IBW formulas
These formulas provide estimates based on height and gender. Individual factors like muscle mass, bone density, and body composition may affect your ideal weight.
Understanding Ideal Weight
Ideal body weight (IBW) formulas estimate a healthy weight based on your height and gender. These are guidelines, not absolute targets.
Why Multiple Formulas? Different formulas were developed for various purposes - some for medical dosing, others for general health assessment.
Limitations: IBW formulas don't account for muscle mass, bone density, or body composition. Athletes may weigh more while still being healthy.
The BMI Range: The healthy BMI range (18.5-24.9) provides a broader, more flexible weight range.
Factors Affecting Ideal Weight
- •Muscle Mass: More muscle means higher healthy weight
- •Bone Density: Affects overall body weight
- •Age: Metabolism and body composition change
- •Activity Level: Athletes may weigh more
- •Body Frame: Larger frames support more weight
Using Your Results
Use the average as a general target, but consider the BMI range for flexibility.
Focus on overall health markers like energy levels, fitness, and body composition rather than just the number on the scale.
💡 Consult a healthcare provider for personalized weight recommendations based on your individual health profile.
Related Health Measurements
Know your ideal weight? Check these to reach it healthily:
Body Mass Index (BMI)
Track your progress toward ideal weight range
Body Fat Percentage
Ensure weight loss comes from fat, not muscle
Daily Calorie Needs
Plan your diet to reach and maintain ideal weight
Basal Metabolic Rate
Understand your baseline calorie burn
Pro Tip: Ideal weight is a range, not a single number. Focus on sustainable health, not perfection.
Weight Goals & Health
Setting Realistic Goals: Aim for gradual weight changes of 0.5-1 kg (1-2 lbs) per week for sustainable results.
Health Indicators: Your waist circumference, body composition, and fitness level are as important as your weight.
Muscle vs. Fat: Muscle weighs more than fat but takes up less space. Focus on body composition, not just the scale.
When to Seek Professional Advice
- •Planning significant weight loss or gain
- •Have existing health conditions
- •Taking medications that affect weight
- •Pregnant or planning pregnancy
- •Recovering from illness or injury
Healthy Weight by Height — Reference Chart
WHO BMI standard · Adults 18+ · Applies to all genders
| Height | Underweight BMI < 18.5 | ✓ Healthy Range BMI 18.5 – 24.9 | Overweight BMI 25 – 29.9 | Obese BMI ≥ 30 |
|---|---|---|---|---|
| 4'11" | < 92 lbs | 92 – 123 lbs | 124 – 148 lbs | > 148 lbs |
| 5'0" | < 95 lbs | 95 – 128 lbs | 128 – 154 lbs | > 154 lbs |
| 5'1" | < 98 lbs | 98 – 132 lbs | 133 – 159 lbs | > 159 lbs |
| 5'2" | < 101 lbs | 101 – 136 lbs | 137 – 164 lbs | > 164 lbs |
| 5'3" | < 104 lbs | 104 – 141 lbs | 141 – 169 lbs | > 169 lbs |
| 5'4" | < 108 lbs | 108 – 145 lbs | 145 – 175 lbs | > 175 lbs |
| 5'5" | < 111 lbs | 111 – 150 lbs | 150 – 180 lbs | > 180 lbs |
| 5'6" | < 115 lbs | 115 – 154 lbs | 154 – 186 lbs | > 186 lbs |
| 5'7" | < 118 lbs | 118 – 159 lbs | 159 – 191 lbs | > 191 lbs |
| 5'8" | < 122 lbs | 122 – 164 lbs | 164 – 197 lbs | > 197 lbs |
| 5'9" | < 125 lbs | 125 – 169 lbs | 169 – 203 lbs | > 203 lbs |
| 5'10" | < 129 lbs | 129 – 174 lbs | 174 – 209 lbs | > 209 lbs |
| 5'11" | < 133 lbs | 133 – 179 lbs | 179 – 215 lbs | > 215 lbs |
| 6'0" | < 136 lbs | 136 – 184 lbs | 184 – 221 lbs | > 221 lbs |
| 6'1" | < 140 lbs | 140 – 189 lbs | 189 – 228 lbs | > 228 lbs |
Based on WHO BMI classification. Athletes with high muscle mass may appear overweight despite healthy body composition — for a more accurate picture use our Body Fat Calculator.
Ideal Weight Calculator — Common Questions
What is the ideal weight for my height?
There is no single ideal weight — it depends on your height, gender, frame size, and body composition. This calculator uses four evidence-based formulas (Robinson, Miller, Devine, Hamwi) to give a healthy range rather than a fixed number. Use the midpoint as a rough target and body fat percentage to assess composition.
Which ideal weight formula is most accurate?
No single formula is universally most accurate. The Robinson formula (1983) is the most widely referenced in clinical settings. Using the average of all four formulas gives a more balanced estimate. All were designed for adults of typical build — athletes may fall outside the range due to muscle mass.
Why do the four formulas give different results?
Each formula was derived from a different population study in a different decade. They reflect different assumptions about average body frame and gender composition. The range they produce together is more useful than any single value — if you fall within any of the four, you are likely at a healthy weight for your height.
Is ideal weight different for men and women?
Yes. The formulas account for the fact that men typically carry more muscle mass and have denser bone structure than women of the same height, resulting in slightly higher ideal weight ranges. This is why the calculator asks for your gender even though BMI does not.
Can I be healthy above my ideal weight?
Yes. These formulas do not account for muscle mass. An athlete or someone with high muscle mass may be above the ideal weight range while having excellent body composition and health markers. Use body fat percentage alongside this calculator — body composition matters more than the number on the scale.
How often should I weigh myself?
Weekly, at the same time of day — ideally in the morning after using the bathroom. Day-to-day fluctuations of 1–2 kg are normal due to water, food, and digestion. Track the weekly average trend rather than individual daily readings. Month-to-month change is what matters.