BMI Calculator

Created by Lead Calculators, Modified on Tue, 16 Sep, 2025 at 2:15 PM by Lead Calculators

The BMI (Body Mass Index) Calculator helps assess whether they are underweight, at a normal weight, overweight, or obese based on their height and weight. By entering their measurements, the calculator provides them with a BMI value and a corresponding weight category.


Users can select their height (in feet) and enter their weight (in pounds). The calculator then computes their BMI using the standard BMI formula: 


BMI = (weight in pounds / (height in inches)²) * 703

The calculator automatically converts their height to equivalent inches. 


Score Calculation

Depending on the calculation results, the scores will be interpreted using the following: 


BMI ScoreScoring Interpretation

Less than 18.5

Low Skeletal Muscle Mass

18.5 - 24.9

Below Skeletal Adequate Muscle Mass

25 - 29.9

Adequate Skeletal Muscle Mass

30 - 34.9

Optimal Skeletal Muscle Mass

35 or higher

Above Skeletal Optimal


Default Email Responses

Each BMI range has a default email response that is sent to the lead once they submit the form. You can customize the email content when setting up your BMI calculator to match your messaging better. 


Low Skeletal Muscle Mass

Default email copy: 

Your BMI is below the healthy range. This might indicate that you're underweight, which can affect your overall health. Consider speaking with a healthcare professional to explore ways to reach a healthier weight.


Below Skeletal Muscle Mass

Default email copy:

Great news! Your BMI falls within the healthy range. This suggests that your weight is appropriate for your height, which is beneficial for your overall health. Keep up the good work by maintaining a balanced diet and staying active.


Adequate Skeletal Muscle Mass

Default email copy: 

Your BMI is slightly above the normal range. This could mean you're carrying a bit of extra weight. It's a good idea to consider lifestyle changes, like adjusting your diet and increasing physical activity, to help bring your BMI back to a healthier range.


Optimal Skeletal Muscle Mass

Default email copy: 

Your BMI is in the high range, which may indicate that you're carrying excess weight. This can increase the risk of health issues. Consider consulting with a healthcare professional to develop a plan for achieving a healthier weight.


Above Skeletal Optimal

Default email copy: 

Your BMI is very high, suggesting a significant amount of excess weight. This can have serious implications for your health. It's important to seek guidance from a healthcare professional to create a personalized plan for reaching a healthier weight.


To edit the copies of each email response, please see our help article on creating a calculator and editing the email templates.

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