Cardio Calculators
Pace, splits, and calorie burn for running and swimming.
Browse every calculator in this category below. Each tool is built to give you a fast answer, a clearer benchmark, and a direct path to the next step in your plan.
Running Pace Calculator
Convert pace, distance, and time for any run or race.
Target Heart Rate Calculator
Find your exercise heart-rate zones from age and resting pulse.
Heart Rate Recovery & VO2 Calculator
Estimate recovery score and VO2 max from heart rate response.
Walking Calorie Calculator
Burn rate for walking based on distance, speed, and weight.
Swimming Calorie Calculator
Energy burn for every stroke style and intensity level.
Swimming Pace Calculator
Calculate splits and pace per 100m for pool and open water.
Swim Progress Predictor
Estimate future swimming speed and times based on frequency.
Explore other categories
Jump to another calculator group when you want a different starting point.
Fitness Calculators
Track strength, body composition, and physical benchmarks.
View category →Nutrition Calculators
Dial in calories, protein, and macros for your goal.
View category →Recovery Calculators
Train hard, recover smart, avoid burnout and injury.
View category →Body Recomposition
Plan muscle growth, fat loss targets, and body transformations.
View category →