Sandy McFadden

This is a great plugin which will help you keep track and brag about the progress you make as you start losing weight or getting healthy. 
You get to decide which measurements you want to keep track of and you can change them at any point.

Health Progress

Health Progress will add a widget and shortcode to your site which will display your starting measurements and progress as you get healthy.

Waterloo Plugins

Add a body mass index calculator to your blog by using the <code>[bmi]</code> shortcode. See the screenshots for previews.
There are 3 built-in styles: material design, Bootstrap, and default (your theme’s styles).
Options:
<ul>
<li>theme – <code>material</code>, <code>clean</code>, <code>default</code>, or <code>none</code></li>
<li>metric – Label text for metric section</li>
<li>imperial – Label text for imperial section</li>
<li>height – Label text for height input</li>
<li>weight – Label text for weight input</li>
<li>heightPlaceholder – Placeholder text for height input</li>
<li>weightPlaceholder – Placeholder text for weight input</li>
<li>submit – Text for submit button</li>
<li>result – Text for result, use <code>%bmi%</code> to represent the calculated BMI</li>
</ul>
Examples: 
 [bmi theme=”clean”] 
 [bmi theme=”material” heightPlaceholder=”Enter your height” submit=”Calculate your BMI!” result=”Your BMI is %bmi%”]

BMI Calculator Plugin

Great!

Add a simple, stylable BMI calculator to your WordPress blog. Comes with several stylish themes.

Health Progress vs BMI Calculator Plugin