Fitness Calculators
Training, pace, and body composition calculators.
One Rep Max Calculator
Estimate your one-rep max using the Epley formula.
Running Pace Calculator
Calculate your running pace per kilometer or mile.
VO2 Max Calculator (Cooper Test)
Estimate VO2 max from the distance covered in a 12-minute run.
Steps to Calories Calculator
Estimate calories burned from a step count.
Marathon Time Predictor
Predict your marathon finish time from a recent race result.
Wilks Score Calculator
Calculate a simplified powerlifting Wilks score to compare lifters across weight classes.
Swim Pace Calculator
Calculate your swimming pace per 100 meters or yards.
Training Load (RPE) Calculator
Calculate session training load using duration and rate of perceived exertion.
Karvonen Target Heart Rate Calculator
Calculate a more precise target heart rate using the Karvonen formula and your resting heart rate.
Rowing Split Pace Calculator
Calculate your rowing pace per 500 meters.
Cycling Average Speed Calculator
Calculate your average cycling speed from distance and time.
Heart Rate Recovery Calculator
Calculate your heart rate recovery, a marker of cardiovascular fitness.
Training Volume Calculator
Calculate total training volume from sets, reps, and weight.
Weekly Mileage Increase Calculator (10% Rule)
Calculate a safe maximum weekly mileage increase for runners.
One Mile Time Predictor
Predict your one-mile race time from a recent longer race.
Sayers Vertical Jump Power Calculator
Estimate lower-body peak power output from vertical jump height and body mass.
Stride Length Calculator
Calculate your average stride length from distance and step count.
Calories to Distance Calculator
Estimate how far you'd need to walk or run to burn a given number of calories.
Workout Density Calculator
Calculate how much training volume you complete per minute of workout time.
Rep Tempo Time Calculator
Calculate total time under tension for a set based on lifting tempo.
Calories Burned Cycling Calculator
Estimate calories burned during a cycling session.
Rowing Machine Calories Calculator
Estimate calories burned during a rowing machine (ergometer) workout.