Accurate, science-based fitness tools to help you achieve your health and fitness goals. Calculate BMI, heart rate zones, calorie needs, and more.
Professional fitness calculators and health tools
Professional heart rate calculators and health tools
Professional weight loss calculators and health tools
Professional-grade calculators trusted by fitness enthusiasts worldwide
Japanese walking is also called interval walking training (IWT) 🔥
Test your bench press max in different ways
Calculate your heart rate zones with this simple calculator
Calculate your Body Mass Index (BMI)
A Test to Measure (predict) VO2 Max
Your Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns each day
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform its most basic life-sustaining functions
Estimate fat loss
Expert insights and tips to help you reach your fitness goals
Short answer: Yes — technically. A pound of certain foods can contain more than 3,500 calories, which is about what a pound of body fat stores.
Many fitness apps calculate Zone 2 using Threshold Heart Rate—which can lead to training too hard. Here’s why HR Max is the better method for accurate Zone 2 workouts.
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