BMI Imperial Calculator

Healthy weight range calculator

Your healthy weight range is calculated by reversing the BMI formula. For your specific height, a BMI of 18.5 gives the lower bound and 24.9 gives the upper bound. This range is where most women have the lowest risk of weight-related health conditions like type 2 diabetes, heart disease, and certain cancers. Remember: the range is a guide, not a rule — muscle mass, bone structure, and life stage all shift what "healthy" looks like for you.

BMI for women: what you should know

Women have unique considerations when interpreting BMI. Essential body fat is higher in women (roughly 10–13% vs. 2–5% in men) due to hormonal and reproductive needs. This means:

• A BMI of 19–20 can be perfectly healthy for many women, especially younger adults
• Muscle-building strength training can raise BMI without increasing health risk
• Post-menopausal women may see BMI rise as muscle mass naturally decreases
• Pregnancy and breastfeeding significantly change appropriate weight ranges
• Waist circumference (under 35 inches for most women) adds important context to BMI

Limitations of BMI

BMI is useful as a population-level screening tool, but it has well-documented limitations. It cannot tell the difference between muscle and fat, doesn't account for fat distribution (belly fat is more dangerous than hip/thigh fat), and doesn't consider age, sex, ethnicity, or pregnancy status. Asian populations often experience health risks at lower BMIs, while athletes may have "overweight" BMIs despite excellent cardiovascular health. Use BMI as one data point alongside waist circumference, blood pressure, cholesterol, blood sugar, and how you actually feel.