BMI calculator for women

BMI for women is one way to categorise a woman’s weight and predict how it might affect her health. A BMI rating is commonly used to check if adults are within the healthy weight range or if they are underweight, overweight or obese.

What is a BMI?

A BMI or body mass index is an indicator of body fatness. It correlates the risk of health problems with the weight at the population level. BMI is a straightforward and commonly-used screening tool.

To find out your BMI, you just need your height and weight measurements. You input these into the BMI formula to calculate your BMI. Once you have your BMI value you use it to classify your weight category as defined by the World Health Organization (WHO). Weight categories are the same for men and women and include underweight, healthy weight, overweight or obese.

A weight category may lead to certain health problems. For example, people with a high BMI are classified as obese and obese people are at increased risk of many diseases and health conditions including high blood pressure, type 2 diabetes, coronary heart disease, stroke and sleep apnoea.

What is the ideal average BMI for a woman?

The ideal average BMI for a woman is between 18.5 and 24.9. BMI recommendations are the same for men and women as the health risks increase at about the same BMI for both genders. However, at the same BMI, women tend to have more body fat than men. Women should also be aware that pregnancy also affects their BMI and that BMI is not applicable whilst they are pregnant.

The parameters for BMI and their weight categories are:

  • Below 18.5 - Underweight
  • 18.5 to 24.9 - Healthy weight
  • 25.0 to 29.9 - Overweight
  • 30.0 and above – Obese

What should the ideal BMI for women be?

The ideal BMI for women and men is considered to be between 18.5 and 24.9. Above this BMI, women fall into the weight categories of overweight and obese. A BMI of 30 or above indicates obesity. A BMI below 18.5 is classified as underweight.

BMI calculator for women

A BMI calculator for women evaluates a woman’s weight compared to her height.

You will need your height and weight to determine your BMI. To calculate the BMI for women, you can use these measurements in a BMI calculation, BMI calculator, or to review a BMI chart.

The most straightforward formula to work out your BMI uses metric units. It is calculated by dividing your weight in kilograms by your height squared in meters.

BMI = Weight (kg) / Height (m)² (

Once you have computed your BMI you can use the figure to classify your weight of underweight, healthy weight, overweight or obese with the parameters determined by the WHO.

BMI chart for women

You can use a BMI chart for women and men to determine if your weight category is underweight, normal, overweight or obese. A BMI chart is a height weight chart for women and men. It typically has height measurements in feet/inches and/or centimeters along the horizontal axis and weight amounts in pounds or kilograms down the vertical axis.

BMI chart can also be used to indicate a suitable weight range to keep within or to aim for, to maintain or achieve a healthy weight BMI rating. For example, if you are a woman of average UK height at 5 foot 3 inches, you can follow this height column down on the BMI chart. When you reach the normal ‘green’ zone, you can see that you need to be a weight of between 105 pounds to 140 pounds to enjoy a healthy weight BMI rating. A woman of the same average UK height falls into the overweight BMI category if they weigh 145 to 165 pounds.

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