10K Pace Calculator
Calculate average running pace in minutes per kilometer from a distance and elapsed time. For a 10K pace, enter 10 km.
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Calculators
Calculators
Decision-support tools for sizing, cost, capacity, runtime, ownership, and other practical planning questions.
5K Pace Calculator
Calculate your average running pace per kilometer and per mile from a 5K finish time. Enter the total time in minutes and seconds.
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Bike Gear Ratio Calculator
Calculate a bicycle drivetrain's gear ratio by dividing the number of teeth on the front chainring by the number of teeth on the rear sprocket. Enter tooth counts to compare gear combinations. The result is a dimensionless ratio and does not account for wheel size, cadence, or distance traveled per pedal revolution.
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Bike Frame Size Estimate Calculator
Estimate a bicycle frame size in centimeters from rider inseam using a simple category-specific multiplier. This is a starting point for comparing frame size charts, not a substitute for a brand's geometry chart or a test ride.
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BMI Calculator
Estimate body mass index from weight and height using the standard metric formula. BMI is a screening measure and does not assess body composition or health on its own.
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BMR Calculator
Estimate basal metabolic rate (BMR) in calories per day using the Mifflin–St Jeor equation and your weight, height, age, and sex category.
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Body Fat Percentage Estimate
Estimate body fat percentage for adults from weight, height, age, and the Deurenberg BMI equation. This is a general estimate, not a direct body composition measurement.
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Body Surface Area Calculator
Estimate body surface area in square meters from height and weight using the Mosteller formula. This estimate is for general educational use and does not determine medication doses or replace clinical assessment.
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Body Weight Change Calculator
Calculate the difference between a starting and ending body weight in kilograms. Enter both measurements in the same unit and interpret the result as a simple change in recorded weight, not a measure of body composition or health.
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Daily Calorie Needs Calculator
Estimate daily energy needs from age, body weight, height, and activity level using the Mifflin-St Jeor equation. This estimate uses the female equation and is for general wellness planning, not medical advice.
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Calorie Deficit Calculator
Estimate a daily calorie deficit by comparing your estimated maintenance calories with a target daily intake. This arithmetic estimate does not determine individual nutrition needs.
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Cycling Cadence Calculator
Calculate cycling cadence in crank revolutions per minute from the number of crank revolutions and the elapsed time in seconds.
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Cycling Calories Calculator
Estimate calories burned while cycling from body weight, ride duration, and an estimated cycling intensity. This simplified model uses a MET value and does not account for individual physiology or ride conditions.
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Cycling Power Calculator
Estimate average cycling power in watts from work against gravity, rolling resistance, and air resistance over a steady ride. The model assumes constant speed on a steady grade and does not account for acceleration, wind, drivetrain losses, or changing terrain.
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Cycling Speed Calculator
Calculate average cycling speed from distance traveled and elapsed riding time. The result uses the same distance unit per hour, such as kilometers per hour or miles per hour.
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Daily Water Intake Calculator
Estimate a general daily fluid target from body weight and activity duration. This simple model is for planning and education, not individualized medical guidance.
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Half Marathon Pace Calculator
Estimate your average pace per mile and kilometer for a half marathon from a target finish time. The calculation uses the standard half marathon distance of 13.1094 miles, or 21.0975 kilometers.
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Heart Rate Reserve Calculator
Estimate heart rate reserve and a target heart rate from your resting heart rate and a chosen maximum heart rate. The estimate uses the heart rate reserve method and is for general activity planning, not a medical assessment.
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Interval Recovery Time Calculator
Calculate the total recovery time across a number of intervals by multiplying the interval count by the seconds assigned to each interval.
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Ironman Pace and Finish Time Calculator
Estimate your full-distance Ironman race time from your planned swim pace, bike speed, run pace, and transition times. The estimate assumes a 3.8 km swim, 180 km bike, and 42.195 km run.
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Lactate Threshold Pace Calculator
Estimate your average running pace at lactate threshold from a recent hard, evenly paced race or time trial. This simple pace-based estimate is not a blood lactate measurement or a clinical assessment.
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Daily Macro Calculator
Estimate daily protein, carbohydrate, and fat targets in grams from a calorie goal, protein target, and chosen carbohydrate-to-fat calorie split. This is a planning worksheet, not an individualized nutrition prescription.
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Marathon Pace Calculator
Estimate average marathon pace per kilometer or mile from a target finish time. This arithmetic result does not account for course, weather, fitness, or race-day conditions.
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Maximum Heart Rate Estimate by Age
Estimate maximum heart rate in beats per minute using the age-based formula 208 − (0.7 × age). This is a general population estimate, not a measured maximum or a training prescription.
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Protein Intake Calculator
Estimate a daily protein target in grams from body weight and a selected activity level. This simple planning estimate is not a clinical prescription.
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Race Time Predictor
Estimate a finish time for a target race distance from a completed race result using a standard distance-projection model. The estimate assumes comparable fitness, pacing, course conditions, and preparation.
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Recipe Nutrition Calculator
Estimate the total calories and calories per serving in a recipe by summing ingredient calories and dividing by the number of servings. Enter ingredient calories from package labels or another nutrition source. This estimate does not calculate protein, carbohydrates, fat, or other nutrients.
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Running Cadence Calculator
Estimate running cadence in steps per minute from your step count and elapsed time. Enter the total steps recorded while running and the matching duration in minutes.
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Running Pace Calculator
Calculate your average running pace per kilometer from the distance covered and elapsed time. Enter distance in kilometers and time in minutes.
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Running Splits Calculator
Estimate your average pace per mile and per kilometer from a planned or completed running distance and total time. Splits are even-pace estimates and do not account for terrain, fatigue, or pace changes.
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Sleep Debt Calculator
Estimate accumulated sleep shortfall across a selected number of days by comparing your sleep goal with your actual average sleep. This simple arithmetic estimate does not diagnose a sleep disorder or determine how much sleep you need.
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Sports Drink Mix Quantity Calculator
Estimate the grams of drink mix needed for a batch by multiplying bottle count by volume per bottle and the mix amount per liter. This assumes each bottle uses the same volume and mix concentration.
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Sweat Rate Calculator
Estimate your average sweat loss per hour during a training session from your body mass change, fluid intake, urine output, and workout duration.
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Swim Pace Calculator
Calculate your average swimming pace per 100 meters or 100 yards from your swim distance and elapsed time. Enter distance in the selected unit and total time in minutes and seconds.
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Swim Split Calculator
Estimate your average time per equal-distance swim split from a total swim time and the number of splits. Enter the total time in seconds and the split count to calculate an average split in seconds.
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Training Equipment Load Volume Calculator
Calculate the total load volume moved across your training sets by multiplying the number of sets, reps per set, and load per rep. Enter load in kilograms. This simple arithmetic estimate assumes the same load and reps apply to every set.
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Training Pace Calculator
Calculate your average running pace in minutes per kilometer from a distance and total duration. This simple calculator assumes a steady average pace across the full distance.
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Training Set Duration Calculator
Estimate a training session's duration in seconds from the number of sets, time per set, and rest periods. The estimate assumes the same set and rest duration throughout and counts one rest after each set when enabled.
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Training Volume Calculator
Calculate total lifted load in kilograms by multiplying the number of sets by reps per set and weight per rep. This simple estimate assumes the same reps and weight for every set and does not measure training intensity, effort, or workout quality.
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Treadmill Pace Calculator
Calculate your average treadmill pace in minutes per mile from your running time and distance. Enter elapsed time in minutes and distance in miles to see the average pace for a completed or planned run.
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Triathlon Finish Time Calculator
Estimate total triathlon time by adding your swim, transition, bike, and run segment times. Enter each segment duration in minutes.
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VO2 Max Estimate from 12-Minute Run
Estimate aerobic fitness using the distance covered in a 12-minute run. This field test provides an approximate VO2 max value and is not a laboratory measurement.
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Waist-to-Height Ratio Calculator
Calculate waist-to-height ratio by dividing waist circumference by height. Enter both measurements in the same unit.
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Waist to Hip Ratio Calculator
Calculate waist-to-hip ratio by dividing waist circumference by hip circumference. Enter both measurements in centimeters or both in inches.
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Walking Calories Calculator
Estimate calories burned during a walk using body weight, walking time, and an assumed average MET value. This is a general estimate, not a measurement of individual energy use.
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Weekly Strength Training Time Calculator
Estimate your total strength training time in a typical week by multiplying the number of sessions by the minutes spent in each session. The estimate counts the session duration you enter and does not assess workout intensity, exercise selection, or recovery needs.
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Weekly Training Session Capacity Calculator
Estimate how many sessions fit into a week by dividing available weekly training minutes by the minutes planned for each session. The estimate assumes every session has the same duration and does not schedule rest days or account for recovery.
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Weight Loss Calorie Planning Calculator
Estimate a daily calorie target from your maintenance-calorie estimate and chosen daily calorie reduction. This is a simple planning model, not a medical assessment or personalized nutrition prescription.
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Workout Distance Calculator
Estimate your total training distance by multiplying the number of workout sessions by the distance covered in each session. Enter sessions and distance in kilometers.
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Workout Sessions Per Week Calculator
Calculate your average workout sessions per week by dividing the total number of sessions by the number of weeks in your tracking period. This simple average assumes each counted session is one workout and does not account for duration, intensity, or rest days.
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