Free Fitness Calculators

Science-based tools to help you plan your training and nutrition.

TDEE Calculator

Get your maintenance, cut, and bulk calorie targets using the Mifflin-St Jeor formula.

1RM Calculator

Estimate your one-rep max and working weights for every rep range using the Epley formula.

Calorie Deficit Calculator

Find your daily deficit, calorie target, and goal timeline for fat loss.

Weight Loss Calculator

Plan your weight loss timeline based on your target and daily deficit.

Virtus Athlete

The workout app that puts YOU in control of your strength and fitness journey

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Virtus Athlete is a training tool, not a medical device nor a substitute for professional guidance. Train responsibly, do your own research, and consult a qualified fitness professional if needed.