Fitness calculators

Quick estimates for the numbers people ask about most: how many calories your body burns, roughly how much body fat you carry, and how heavy your one rep max probably is. Each calculator runs in your browser, sends nothing and stores nothing, and the page under it explains the formula, what the number can and cannot tell you, and what to do with it. They are estimates for general fitness use, not medical advice.

• BMRBMR Calculator: How Many Calories Your Body Burns at RestHow many calories your body burns at rest, and your daily total by activity level.
• %Body Fat Calculator (U.S. Navy Method)Estimate your body fat percentage with a tape measure (U.S. Navy method).
• 1RMOne Rep Max Calculator (1RM)Estimate your one rep max from the sets you already do, with training weights.

The information on this page and on this website is intended to provide general information only. The content on this website does not constitute a professional opinion, a recommendation, or a substitute for consulting an expert in a specific field or obtaining a medical opinion. It is not medical advice. BodyPlus is not a medical device. If you have a health condition or an injury, talk to a qualified healthcare professional before starting. Stop exercising and seek appropriate help if you feel pain, dizziness or other concerning symptoms.