Fitness Calculators
Fitness progress is invisible day to day and obvious month to month, which is exactly why it pays to measure. This category covers the numbers behind training: heart rate zones for calibrating intensity, one-rep max estimates for programming lifts, pace and race-time predictors for runners, calorie burn estimates with honest error bars, and body composition tracking that separates fat loss from muscle gain. The theme across all of them is trends over snapshots: a single weigh-in or workout number means little, but the same measurement taken consistently for eight weeks tells the truth. Use these calculators to set targets, structure training weeks, and verify that the program is working. Pair the numbers with how you feel and perform; when data and body disagree, a coach's eyes beat any equation.
42 free fitness calculators. Every tool runs instantly in your browser with the formula shown, a worked example, and answers to common questions.
Beep Test estimates a health-related number from standard formulas used in fitness and medicine.
Bench Standards estimates a health-related number from standard formulas used in fitness and medicine.
Body Fat Fitness estimates a health-related number from standard formulas used in fitness and medicine.
Burpee Test estimates a health-related number from standard formulas used in fitness and medicine.
Cadence Calc solves the little math problems of daily life: dates, trips, timers and quick estimates.
Calories Burned estimates a health-related number from standard formulas used in fitness and medicine.
Calories Exercise estimates a health-related number from standard formulas used in fitness and medicine.
Cycling Speed solves the little math problems of daily life: dates, trips, timers and quick estimates.
Deadlift Standards estimates a health-related number from standard formulas used in fitness and medicine.
Max Heart Rate estimates a health-related number from standard formulas used in fitness and medicine.
Muscle Gain handles kitchen math: scaling recipes, timing food, and estimating nutrition.
One Rep Max estimates a health-related number from standard formulas used in fitness and medicine.
Overhead Standards estimates a health-related number from standard formulas used in fitness and medicine.
Race Predictor solves the little math problems of daily life: dates, trips, timers and quick estimates.
Recovery HR estimates a health-related number from standard formulas used in fitness and medicine.
Resting Metabolic estimates a health-related number from standard formulas used in fitness and medicine.
Row Standards estimates a health-related number from standard formulas used in fitness and medicine.
Rowing Split solves the little math problems of daily life: dates, trips, timers and quick estimates.
Running Pace solves the little math problems of daily life: dates, trips, timers and quick estimates.
Sports Calories estimates a health-related number from standard formulas used in fitness and medicine.
Squat Standards estimates a health-related number from standard formulas used in fitness and medicine.
Steps To Distance solves the little math problems of daily life: dates, trips, timers and quick estimates.
Stride Length solves the little math problems of daily life: dates, trips, timers and quick estimates.
Sweat Rate estimates a health-related number from standard formulas used in fitness and medicine.
Swim Pace solves the little math problems of daily life: dates, trips, timers and quick estimates.
Training Volume estimates any service-style bill from its parts: a base fee plus usage rates.
Treadmill Pace solves the little math problems of daily life: dates, trips, timers and quick estimates.
Vertical Jump works with pure number theory and discrete math: the exact, integer side of mathematics.
Vo2 Beep estimates a health-related number from standard formulas used in fitness and medicine.
Vo2Max estimates a health-related number from standard formulas used in fitness and medicine.
Weight Loss handles kitchen math: scaling recipes, timing food, and estimating nutrition.