Joomla Component BMI and Body Fat Percentage (com_wst_bmi) calculator is multilingual with support of 5 languages (Italian, Spanish, German, French and Portuguese). You can use your business logo or an image you like in calculator header, just replace image file in components/com_wst_bmi/images with your image. ( Image / Logo size must be 125 x 30 pixels)
This Joomla Component has easy to use interface. The user must fill in all fields in order to receive accurate calculation.