Fitness Tools & Calculators

Explore our collection of free fitness tools designed to help you track your progress and achieve your health goals.

Online Interval Timer

A lightweight interval timer that runs directly in your browser. Get notifications for work and rest intervals while using your computer.

Calculate your Body Mass Index to assess your body weight relative to your height.

Determine your Basal Metabolic Rate - the calories your body burns at rest.

Calculate your Total Daily Energy Expenditure based on your activity level.

Find your optimal protein, carb, and fat intake for your fitness goals.

Estimate your body fat percentage using the US Navy Method.

Calculate your One-Rep Max to optimize your strength training.

Calculate your Maximum Heart Rate (MHR) and training zones.

Download our customizable Interval Timer App. Perfect for HIIT, Tabata, and keeping your workouts on track anywhere, anytime.