Free Fitness Calculators

Evidence-based fitness and nutrition calculators to help you train smarter. All tools are free, no signup required.

TDEE Calculator

Estimate your daily calorie burn based on your stats and activity level.

Macro Calculator

Get your daily protein, carb, and fat breakdown for any goal.

Protein Intake Calculator

Find your optimal daily protein target based on science.

One-Rep Max Calculator

Estimate your max lift from any weight and rep count.

Calorie Deficit Calculator

Plan your calorie deficit and estimate your fat loss timeline.

Subscription Savings Calculator

Compare FlexToast's quarterly plan vs. monthly fitness apps.

Discover Your Fitness Archetype

Answer a few questions and find out what type of lifter you are.

Find Your Archetype →

Want More Than Numbers?

These calculators give you a starting point. FlexToast AI analyzes your physique photos and builds a complete training and nutrition program custom-built for your body.

Get Your FlexToast Plan →