All sports calculators

23 free tools, from chrono running to your calorie deficit. Choose your goal.

Pilier 1 Course à pied / cardio VMA, FC max, zones cardiaques, VO2 max, prédiction de chrono, convertisseur allure/vitesse. Pilier 2 Musculation / force 1RM, pourcentages de charge, volume de séance, disques à charger, score Wilks/DOTS. Pilier 3 Composition corporelle IMC, TDEE, métabolisme de base, masse grasse, masse maigre, poids idéal, ratio taille/hanches. Pilier 4 Nutrition sportive Macros, déficit/surplus calorique, besoins en protéines, hydratation, calories brûlées par activité.

How to choose the right calculator

Each family of tools corresponds to a type of objective. Running if you prepare a time or structure your heart zones. Bodybuilding if you want to calibrate your loads and schedule your sessions. Body composition to assess your state of fitness and set a course. Nutrition to manage your energy on a daily basis and during training.

Why separate calculators?

All calculations start from simple measurements (height, weight, age, sex, activity level) but answer different questions. The VMA calculation gives a speed in km/h that can be used to calibrate a split. VO2 max gives a physiological potential in mL/kg/min. BMR gives your energy at rest. The TDEE the total energy of a day. Knowing each indicator means managing your progress without approximation.

Precision and limits

All our calculators use the reference equations (Mifflin–St Jeor for BMR, Karvonen for cardiac zones, Epley/Brzycki for 1RM, etc.). These formulas are scientifically validated but are based on statistical estimates: never replace medical advice or personalized coaching on the basis of a single calculation.

À consulter aussi

Calcul VMA Vitesse maximale aérobie en 5 min Calcul IMC Indice de masse corporelle TDEE Dépense énergétique totale Calcul 1RM Max load on one rep. Calculating macros Protéines, glucides, lipides Zones cardiaques Méthode Karvonen

Questions fréquentes

Yes. All Koatcher calculators are free, with no registration required and no advertising in the tool.

For athletes of all levels (beginner to competitor), coaches who calibrate their sessions, and quantified-self enthusiasts who want to track their metrics.

Each page specifies the reference formula and the sources. We use the consensus equations in the scientific literature (Mifflin–St Jeor, Karvonen, Epley, etc.).

If you are logged in to your Koatcher account, you can save your results and monitor their progress. Otherwise the calculations remain in your browser.