Do you want to know how heavy of a kettlebell you should buy? Functional Strength Lab has provided its users a simple and rough kettlebell calculator to determine how big of a kettlebell they should buy. After you select your gender, weight range, and fitness level, hit “calculate weight” and a prompt with a link to buy your suggested weight kettlebell (from Amazon) will be generated. Disclaimer: Please consult your physician before undergoing any fitness routine! These are only weight suggestions and you should never try to work out with a kettlebell that you are not trained to use or with which you don’t feel comfortable.