Fitness & Exercise Calculators — Health
Train with targets grounded in exercise science. The exercise heart rate calculator sets your training zones from max heart rate, the workout calorie tool estimates burn by exercise, sets, and reps, and the strength level and muscle gain potential calculators benchmark your lifts and realistic rate of progress. Each shows the formula and assumptions, helping you plan sessions and track gains against evidence-based expectations.
All Fitness & Exercise Calculators
Calculate target heart rate zones for fat burn, cardio, and peak training.
Estimate your natural muscle gain potential from height, wrist, and ankle measurements.
Check your strength level for major lifts against population percentiles by body weight.
Calculate total calories burned during a workout from exercises, sets, reps, and rest.
About Fitness & Exercise Calculators
Train with targets grounded in exercise science. The exercise heart rate calculator sets your training zones from max heart rate, the workout calorie tool estimates burn by exercise, sets, and reps, and the strength level and muscle gain potential calculators benchmark your lifts and realistic rate of progress. Each shows the formula and assumptions, helping you plan sessions and track gains against evidence-based expectations.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common fitness & exercise scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 4tools: Exercise Heart Rate Calculator, Muscle Gain Potential Calculator, Strength Level Calculator, Workout Calorie Calculator — By Exercise, Sets & Reps. Each calculator is free to use with no signup required.