running Calculators
Last updated: May 2026
Pace Calculator
Find your running pace in minutes per kilometer (or per mile) by dividing total run time by distance covered.
Marathon Time Predictor
Predict your marathon finish time from a recent 5K, 10K, or half marathon result using empirical scaling factors tuned to typical recreational runners.
Running Calories Calculator
Estimate calories burned on a run based on body weight, distance covered, and pace using empirical multipliers from exercise physiology research.
VO2 Max Calculator
Estimate your VO2 max (maximum oxygen uptake) from a timed run by combining distance, time, and age into a Cooper-style empirical formula.
Running Split Calculator
Calculate the expected time at any checkpoint during a race by dividing a target finish time evenly across the distance.
Training Pace Zones Calculator
Determine your personalized running pace zones from a recent race result.
Running Cadence Calculator
Calculate your running cadence in steps per minute by counting steps over a short timed interval.
Race Finish Time Calculator
Predict your total race finish time from distance and your planned pace per kilometre.
Weekly Mileage Planner
Distribute your weekly running kilometres across your available training days, including a proportional long run.
Altitude Pace Adjustment
Estimate how much slower your running pace will be at elevation compared to sea level.
Race Pace Calculator
Find the exact per-mile or per-kilometer pace you need to hit your finish-line goal.
Running Calorie Burn Calculator
Estimate the calories you burn on any run by factoring in your body weight, distance, pace, and terrain type.
Marathon Training Pace Calculator
Determine your personalised easy, tempo, interval, and long-run training paces from your marathon goal time.
Running Power Zone Calculator
Calculate your running power zones from your critical power output and body weight, adjusted for training altitude.
Running Heat Index Calculator
Estimate how much to slow your easy run pace on hot, humid days to maintain equivalent effort and avoid heat illness.
Running Stride Rate Calculator
Find your ideal running cadence (steps per minute) based on your height, current pace, target pace, and terrain.
Running Recovery Time Calculator
Estimate how many hours of recovery you need between hard running sessions based on workout duration, intensity, age, and fitness level.
Running Race Equivalency Calculator
Predict your expected finish time at any race distance using a recent race result.
Running Pace Calculator
Convert between finish time, distance, and pace for any running workout or race.
Training Zone Calculator
Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method.
Race Split Calculator
Plan your race pace by calculating per-mile or per-km splits from your goal finish time.
Taper Schedule Calculator
Determine how much to reduce your weekly mileage during the weeks before a marathon or half marathon.
Altitude Running Adjustment Calculator
Estimate how much slower your running pace will be at high altitude compared to sea level.
Running Calorie Calculator
Calculate how many calories you burn on a run based on your weight, distance, pace, and terrain type.
Heart Rate Training Zones Calculator
Calculate your personalized heart rate training zones using your resting and maximum heart rate.
Running Hydration Calculator
Estimates how many ounces of fluid a runner needs during a run based on body weight, duration, temperature, and intensity.
Treadmill Pace Converter
Converts treadmill speed (MPH or KPH) to running pace (per mile or per km) while accounting for incline grade.
Running Cadence & Stride Calculator
Estimates your target running cadence (steps per minute) and stride length based on your height, current pace, and experience level.
Marathon Fueling Calculator
Calculates how many grams of carbohydrates you need during a marathon or long race based on body weight, expected finish time, intensity, and weather.
Running Injury Risk Calculator
Scores your running injury risk as a percentage based on weekly mileage, how sharply you increased it, your experience level, and recovery quality.
Marathon Training Calculator
Plan your marathon buildup by calculating a weekly mileage target and ideal training paces from your goal finish time.
Running Calorie Burn Calculator
Estimate the calories you burn on any run by entering your weight, distance, pace, and terrain type.
Race Time Predictor
Predict your finish time at any race distance using a recent result from a different distance.
Running Cadence Optimizer
Find your optimal running cadence in steps per minute based on your height, current pace, and running style.
Training Load Calculator
Quantify your overall training stress each week by combining mileage, intensity, hard workout count, and years of experience.
Running Hydration Calculator
Estimates how much fluid you need to drink before, during, and after a run based on your body weight, ambient temperature, run duration, and effort level.
Running Economy Calculator
Calculates a running economy score that reflects how efficiently you convert aerobic capacity into race speed, accounting for VO2 Max, pace, body weight, and experience.
Marathon Taper Calculator
Calculates the recommended weekly training volume for each week of your pre-race taper, scaling down from peak mileage based on your recovery rate, taper length, and race distance.