Female Ideal Body Weight Calculator
Use your height to estimate ideal body weight (IBW) for women using four common medical formulas (Devine, Robinson, Miller, and Hamwi).
This tool is for educational use and does not replace personalized medical advice.
What is ideal body weight for women?
Ideal body weight (IBW) is an estimate of a healthy body weight based mainly on height and sex. For women, common formulas start from a baseline at 5 feet and add a small amount for each inch above that height. Clinicians use IBW in settings like medication dosing, nutrition planning, and health screening.
It is important to treat IBW as a reference point, not a strict target. Your healthiest weight can vary based on body composition, muscle mass, bone structure, age, activity level, and medical history.
How this female IBW calculator works
This calculator converts your height and applies four widely used formulas for women:
- Devine: 45.5 kg + 2.3 kg per inch over 5 ft
- Robinson: 49.0 kg + 1.7 kg per inch over 5 ft
- Miller: 53.1 kg + 1.36 kg per inch over 5 ft
- Hamwi: 45.5 kg + 2.2 kg per inch over 5 ft
You also get a healthy BMI weight range (BMI 18.5 to 24.9) so you can compare a formula-based estimate with a broader screening range.
How to interpret your result
1) Look at the range, not one exact number
If one formula says 58.4 kg and another says 61.2 kg, that variation is normal. The body is not one-size-fits-all.
2) Compare with your current weight carefully
If you entered current weight, the calculator shows how far above or below the formula average you are. This is useful for context but should not be treated as a diagnosis.
3) Combine numbers with real health markers
- Energy levels throughout the day
- Strength, endurance, and mobility
- Blood pressure, lipids, and blood sugar
- Sleep quality and menstrual health
Why women should use IBW as a guide, not a rule
Female body composition naturally changes across life stages, including adolescence, pregnancy/postpartum, and menopause. Muscle gain from training can also increase scale weight while improving health outcomes. For these reasons, IBW is best used alongside waist measurements, fitness markers, and lab values.
Practical next steps after calculating
If your goal is fat loss
- Aim for gradual change (often 0.25 to 0.75 kg per week).
- Prioritize protein intake and resistance training.
- Use sleep and stress management to support appetite control.
If your goal is healthy weight gain
- Increase calories modestly with nutrient-dense foods.
- Strength train consistently to gain lean mass.
- Track trends monthly instead of reacting to daily fluctuations.
Example female IBW estimates
For a woman who is 5'4" (162.6 cm), formula outputs typically land around the upper 50s to low 60s kg range. For 5'8" (172.7 cm), values often move into the mid-60s kg range. These are estimates, but they help create realistic planning targets.
FAQ
Is ideal body weight the same as BMI?
No. IBW formulas estimate a target weight from height using fixed equations. BMI is a ratio of weight to height and gives broad categories.
Can athletic women have a higher healthy weight than IBW?
Yes. Higher muscle mass can place body weight above formula estimates while overall health remains excellent.
Should I use this during pregnancy?
Use pregnancy-specific guidance from your clinician. Standard IBW formulas are not designed for pregnancy weight planning.
Bottom line
An ideal body weight calculator for females is a fast way to set a starting point. Use the result as one data point, then personalize with your health goals, lifestyle, and professional guidance when needed.