One Rep Max Calculator
Estimate one-repetition maximum from a submaximal weight and repetition count using the Epley formula.
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Health & Fitness Calculators
Explore free health & fitness calculators designed for quick estimates, clear inputs and practical results.
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Health & Fitness Calculators
Wilks Score Calculator
Estimate a legacy Wilks score from body weight, lifting total and sex-specific coefficients.
Use calculator →Brzycki 1RM Calculator
Estimate one-repetition maximum using the Brzycki equation.
Use calculator →Sleep Calculator
Estimate a bedtime from wake time and a selected number of 90-minute sleep cycles.
Use calculator →Pregnancy Weight Gain Range Calculator
View a general singleton pregnancy weight-gain range by pre-pregnancy BMI category; confirm personal targets with a clinician.
Use calculator →Walking Calorie Calculator
Estimate calories burned while walking using body weight, duration and a MET value.
Use calculator →Heart Rate Zone Calculator
Estimate maximum and target training heart rate using age, resting heart rate and the Karvonen method.
Use calculator →BMI Calculator
Calculate BMI from weight and height and see the standard adult BMI category.
Use calculator →BMR Calculator
Estimate daily basal metabolic rate with the Mifflin-St Jeor equation.
Use calculator →TDEE Calculator
Estimate total daily energy expenditure from BMR and an activity factor.
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