running Calculators
Pace Calculator
Find your running pace in minutes per kilometer from any race or training run. Enter your total time and distance to instantly see how fast you ran each kilometer.
Marathon Time Predictor
Predict your full marathon finishing time using a recent 5 km, 10 km, or half marathon result. Useful for setting a realistic race goal before your first or next 42.2 km event.
Running Calories Calculator
Estimate the calories you burn on any run based on your body weight, distance covered, and pace. Useful for tracking energy expenditure in a training log or weight-management plan.
VO2 Max Calculator
Estimate your aerobic fitness level (VO2 max) from a timed run by entering distance, time, and age. Helpful for tracking cardiovascular improvement over a training cycle.
Running Split Calculator
Calculate the expected time at any checkpoint during a race by dividing your total target time evenly across the distance. Ideal for pacing strategy before a 5 km, 10 km, or marathon.
Training Pace Zones Calculator
Determine your personalized running pace zones from a recent race result. Use this before a training cycle to set effort-based targets for easy runs, tempo sessions, and intervals.
Running Cadence Calculator
Calculate your running cadence in steps per minute by counting steps over a short timed interval. Use this mid-run or during drills to check if your stride rate falls in the optimal efficiency range.
Race Finish Time Calculator
Predict your total race finish time from distance and your planned pace per kilometre. Essential for pacing strategy before a 5K, 10K, half-marathon, or marathon.
Weekly Mileage Planner
Distribute your weekly running kilometres across your available training days, including a proportional long run. Use this when building a training block to balance load and recovery intelligently.
Altitude Pace Adjustment
Estimate how much slower your running pace will be at elevation compared to sea level. Use this before racing or training at altitude to set realistic effort targets and avoid blowing up early.
Race Pace Calculator
Find the exact per-mile or per-kilometer pace you need to hit your finish-line goal. Enter your race distance and target time to instantly see the required split.
Running Calorie Burn Calculator
Estimate the calories you burn on any run by factoring in your body weight, distance, pace, and terrain type. Useful for fueling strategy, weight management, and training load tracking.
Marathon Training Pace Calculator
Determine your personalised easy, tempo, interval, and long-run training paces from your marathon goal time. Helps structure every week of training to peak on race day.
Running Power Zone Calculator
Calculate your running power zones from your critical power output and body weight, adjusted for training altitude. Ideal for athletes using power meters like Stryd to structure interval and threshold sessions.
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. Enter temperature, humidity, your normal pace, and heat acclimation level to get your adjusted target.
Running Stride Rate Calculator
Find your ideal running cadence (steps per minute) based on your height, current pace, target pace, and terrain. Use this when fine-tuning your running form to reduce injury risk and improve efficiency.
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. Ideal for planning weekly training schedules without overtraining.
Running Race Equivalency Calculator
Predict your expected finish time at any race distance using a recent race result. Based on the Jack Daniels equivalency model, it adjusts for the extra fatigue cost of longer distances.
Running Pace Calculator
Convert between finish time, distance, and pace for any running workout or race. Use it to plan race strategy, set treadmill speed, or analyze a completed run.
Training Zone Calculator
Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method. Use it when structuring your weekly runs to target specific fitness adaptations.
Race Split Calculator
Plan your race pace by calculating per-mile or per-km splits from your goal finish time. Use it when targeting a specific finishing time for any race distance from 5K to marathon.
Taper Schedule Calculator
Determine how much to reduce your weekly mileage during the weeks before a marathon or half marathon. Ideal for runners finalizing their race-week training plan.
Altitude Running Adjustment Calculator
Estimate how much slower your running pace will be at high altitude compared to sea level. Use this when traveling to a race at a significantly different elevation than where you train.
Running Calorie Calculator
Calculate how many calories you burn on a run based on your weight, distance, pace, and terrain type. Useful for tracking energy expenditure in training or weight management planning.
Heart Rate Training Zones Calculator
Calculate your personalized heart rate training zones using your resting and maximum heart rate. Designed for distance runners who want to optimize aerobic base, tempo, and interval training intensities.
Running Hydration Calculator
Estimates how many ounces of fluid a runner needs during a run based on body weight, duration, temperature, and intensity. Use it before long runs or races to plan your hydration strategy and avoid dehydration.
Treadmill Pace Converter
Converts treadmill speed (MPH or KPH) to running pace (per mile or per km) while accounting for incline grade. Ideal for translating treadmill display numbers into the pace metrics runners track outdoors.
Running Cadence & Stride Calculator
Estimates your target running cadence (steps per minute) and stride length based on your height, current pace, and experience level. Use it when trying to improve running efficiency or reduce injury risk.
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. Use it during race planning to build your on-course nutrition strategy.
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. Use it when ramping up training to catch dangerous load spikes before they cause injury.
Marathon Training Calculator
Plan your marathon buildup by calculating a weekly mileage target and ideal training paces from your goal finish time. Use it when structuring a training block weeks before race day.
Running Calorie Burn Calculator
Estimate the calories you burn on any run by entering your weight, distance, pace, and terrain type. Useful for fueling decisions, weight management, and post-run nutrition planning.
Race Time Predictor
Predict your finish time at any race distance using a recent result from a different distance. Ideal for setting realistic goals when stepping up from a 5K to a half marathon or full marathon.
Running Cadence Optimizer
Find your optimal running cadence in steps per minute based on your height, current pace, and running style. Use it to reduce injury risk and improve running economy.
Training Load Calculator
Quantify your overall training stress each week by combining mileage, intensity, hard workout count, and years of experience. Use it to balance progression and recovery and avoid overtraining.
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. Use it to avoid dehydration on hot or long training days.
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. Useful for comparing training adaptations over time.
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. Ideal for marathon and ultramarathon preparation.