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Fitness and Health Calculators

The complete CalcNova fitness and health library — body composition, calories and nutrition, training, and pregnancy. Every calculator is free, runs in your browser, and is built on the standard published formula for its job, checked against reference examples before it goes live. New calculators are added regularly — this page is the complete library and the single place to find every one of them.

28 calculators across three categories — fitness, pregnancy, and other health tools.

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Fitness

Pregnancy

Other

How to Pick the Right Calculator

Start from the question, not the formula. Where do I stand? The BMI calculator gives the standard screening number, the body fat calculator refines it with tape measurements, and the healthy weight calculator turns it into a target range. What should I eat? Chain the BMR calculator into TDEE and the calorie calculator for your goal, then split the calories with the macro and protein calculators. Training? Set running goals with the pace calculator, lifting loads with one rep max, and intensity with target heart rate. Expecting? Start at the pregnancy calculator for the timeline, confirm the date on the due date calculator, and track the healthy range with pregnancy weight gain.

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A note on accuracy

Every calculator here uses the standard formula for its job — Mifflin-St Jeor for metabolic rate, the U.S. Navy tape method for body fat, WHO categories for BMI, Naegele's rule for due dates — and is checked against published reference examples before release. Formulas estimate; bodies vary. Treat every result as a well-founded planning number, not a measurement, and never as medical advice: for decisions about your health, talk to a qualified professional who can examine you in person.

FAQ

Are these calculators free?

Yes — no sign-up, and everything runs in your browser. Nothing you type is sent to a server.

How accurate are they?

Built on the standard published formulas and checked against reference results before release. They are estimates for general information — not a diagnosis and not medical advice.

Can I save or share a calculation?

Yes — calculators update the URL with your inputs. Anyone opening the link sees your exact numbers prefilled.