Sports calculators

Pace, power, and performance math for every sport.

Running, cycling, swimming, and gym math — from race pace and splits to power-to-weight and training-load calculations.

Calculators

165

Topics: All Running (14) Cycling (10) Swimming (8) Gym (2)

Reactive Strength Index (RSI) from Jump Height and Contact Time Calculator

Calculates RSI = jump height (m) / ground contact time (s). Values >2.5 are elite; 1.5–2.5 are good; <1.5 needs improvem...

basic

19,762 4.8 1 min

Sports

Sport Climbing Grade Comparison Calculator

Converts between the French (sport climbing), US Yosemite Decimal System (YDS), and V-scale bouldering grades.

basic

15,824 4.5 1 min

Sports

Sweat Rate and Fluid Replacement Calculator

Calculates sweat rate = (pre_weight − post_weight + fluid_consumed) / exercise_hours. Recommends fluid replacement per h...

basic

15,773 4.1 1 min

Sports

Soccer Expected Goals xG Simple Model Calculator

Estimates expected goals (xG) for a shot in soccer/football using a simplified exponential model based on shot distance...

basic

11,872 4.9 1 min

Sports / Swimming

Swimming Pace per 100 m / 100 yd Calculator

Converts total swim time and distance into pace per 100 m or 100 yd, and projects splits for any target race distance.

basic

2,358 4.8 1 min

Sports

Wrestling Weight Cut Hydration Calculator

Calculates the weight to lose for a weight class, estimated water deficit, and recommended rehydration volume for wrestl...

basic

991 4.6 1 min

Sports

Wingate Anaerobic Peak Power from Load and Cadence Calculator

Estimates Wingate peak power: PP = Torque × ω = (load × 9.81 × wheel_radius) × (2π × peak_rpm / 60). Mean power ≈ 0.75 ×...

basic

947 4.2 1 min

Sports

Wet Bulb Globe Temperature (WBGT) Heat Stress Calculator

Estimates outdoor WBGT ≈ 0.7×Tw + 0.2×Tg + 0.1×Td, where Tw is wet-bulb temperature, Tg is black-globe temperature, and...

basic

18,218 4.9 1 min

Sports

Cross-Country Skiing Speed & Effort Calculator

Estimates power output and aerobic demand of cross-country skiing from speed, body mass, and terrain gradient.

basic

15,319 4.0 1 min

Sports / Running

Maximal Aerobic Speed (MAS) Calculator

Estimates Maximal Aerobic Speed (MAS) from VO₂max or a time trial, and calculates training paces at different percentage...

basic

12,949 4.1 1 min

Sports

Kayak/Canoe Paddling Cadence and Speed Calculator

Estimates kayak/canoe speed from stroke rate (strokes/min) and effective forward distance per stroke: speed = (distance_...

basic

7,925 3.9 1 min

Sports

Elo Rating Change from Match Result Calculator

Calculates the new Elo rating for a player after a match. K-factor controls rating volatility. Expected score E accounts...

basic

6,754 3.9 1 min

Sports

Rowing 2K Average Split Time Calculator

Calculates the average 500m split = total_seconds / 4, speed in m/s, and compares split to Concept2 rating categories.

basic

1,749 4.9 1 min

Sports / Cycling

Cycling FTP Watts per Kg Calculator

Calculates cycling power-to-weight ratio from Functional Threshold Power (FTP) and body mass, and classifies the rider c...

basic

1,146 4.7 1 min

Sports / Running

Aerobic Threshold Heart Rate Estimate from Max HR Calculator

Estimates the aerobic (AeT) threshold HR ≈ 0.65–0.75 × HRmax, and the anaerobic threshold (AnT) HR ≈ 0.82–0.90 × HRmax....

basic

24,339 4.9 1 min

Sports

Target Heart Rate Zone from Max and Resting HR Calculator

Calculates target heart rate training zones using the Heart Rate Reserve (HRR) method. Enter lower and upper intensity p...

basic

23,756 4.2 1 min

Sports

Ski Slope Angle & Steepness Calculator

Calculates ski slope angle (degrees), gradient (%), and vertical drop from slope length and rise, plus estimated descent...

basic

23,450 4.8 1 min

Sports

Ski Resort Vertical Descent and Runs per Day Calculator

Estimates total vertical descent (number of runs × vert per run), lift time vs ski time, and calories burned: ~400 kcal/...

basic

20,767 3.9 1 min

Sports

Relative Strength & Body Weight Ratio Calculator

Calculates relative strength ratio (lift/bodyweight) for squat, bench, and deadlift, and classifies performance level ag...

basic

5,712 3.9 1 min

Sports / Cycling

Cycling FTP Watts-per-Kilogram Calculator

Calculates cycling FTP (watts/kg) from absolute FTP and body weight. Classification: <2 untrained, 2–2.9 recreational, 3...

basic

2,711 4.8 1 min

Sports

Tennis Serve Ace Statistic Calculator

Calculates serve statistics including first-serve %, points won on 1st/2nd serve, ace rate, and estimated hold % from se...

basic

817 4.6 1 min

Sports / Running

Running Economy: VO₂ at Submaximal Running Pace Calculator

Estimates VO₂ at submaximal speed using the ACSM running equation: VO₂ (mL/kg/min) = 0.2 × speed(m/min) + 0.9 × speed(m/...

basic

23,038 4.8 1 min

Sports

Boxing Punch Force from Mass and Velocity Calculator

Estimates the peak force of a punch from fist mass, punch velocity, and impact distance (glove compression) using the wo...

basic

22,617 4.6 1 min

Sports

Squat Strength-to-Bodyweight Ratio Calculator

Calculates squat:bodyweight ratio and classifies performance: <1.0 untrained, 1.0–1.5 novice, 1.5–2.0 intermediate, 2.0–...

basic

16,135 4.5 1 min

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Sports calculators

Reactive Strength Index (RSI) from Jump Height and Contact Time Calculator

Sport Climbing Grade Comparison Calculator

Sweat Rate and Fluid Replacement Calculator

Soccer Expected Goals xG Simple Model Calculator

Swimming Pace per 100 m / 100 yd Calculator

Wrestling Weight Cut Hydration Calculator

Wingate Anaerobic Peak Power from Load and Cadence Calculator

Wet Bulb Globe Temperature (WBGT) Heat Stress Calculator

Cross-Country Skiing Speed & Effort Calculator

Maximal Aerobic Speed (MAS) Calculator

Kayak/Canoe Paddling Cadence and Speed Calculator

Elo Rating Change from Match Result Calculator

Rowing 2K Average Split Time Calculator

Cycling FTP Watts per Kg Calculator

Aerobic Threshold Heart Rate Estimate from Max HR Calculator

Target Heart Rate Zone from Max and Resting HR Calculator

Ski Slope Angle & Steepness Calculator

Ski Resort Vertical Descent and Runs per Day Calculator

Relative Strength & Body Weight Ratio Calculator

Cycling FTP Watts-per-Kilogram Calculator

Tennis Serve Ace Statistic Calculator

Running Economy: VO₂ at Submaximal Running Pace Calculator

Boxing Punch Force from Mass and Velocity Calculator

Squat Strength-to-Bodyweight Ratio Calculator