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Sports calculators

Performance and scoring maths for training and competition, from running pace and gear ratios through to rating systems and win percentages.

Steps to caloriesEstimated calories burned from a step count, body weight and average stride length.Half Marathon PaceRequired pace and split times for a half or full marathon from a target finish time.Average SpeedAverage speed in km/h from total distance and total time, for any mode of travel.Bike gear ratio & speedGear ratio, development and road speed for a given chainring, cog and cadence.Bike frame sizeRecommended frame size from inseam length, by bike type.Stride length & distance from stepsStride length from height, and a step count turned into distance.Hull speed (displacement boat)The theoretical top speed of a displacement-hull boat from its waterline length.Wilks score (powerlifting)Bodyweight-adjusted strength score for comparing lifters across weight classes.Elo rating changeHow a single result moves a player or team’s Elo rating.NFL passer ratingThe 0–158.3 quarterback rating from completions, yards, touchdowns and interceptions.Race time predictorPredicts a finish time at a new distance from a recent race result, using Riegel’s formula.Hiking time (Naismith’s rule)Estimated walking time for a hike from distance and total ascent.Bruce protocol VO₂maxEstimated maximal oxygen uptake from total time on a standard Bruce treadmill test.Magic number (pennant race)Combined wins by your team and losses by the nearest rival needed to clinch a spot.Net run rate (cricket)The run-rate differential used to separate teams level on points.Bench Press PyramidA pyramid set-and-rep scheme for bench press, stepping weight up toward a top set from a target working weight.Follow On in Test Cricket CalculatorChecks whether a lead after the first innings of a Test match meets the 200-run follow-on threshold.Net Run Rate (NRR) CalculatorNet run rate for a cricket team from runs and overs, using the scored-minus-conceded method.Win/Loss Percentage CalculatorWin percentage from wins, losses and optional ties, using either the standard or half-win tie convention.Ski Length CalculatorGeneral starting guide to ski length from height and ability level, using standard chin-to-forehead sizing bands.Bike Sizing CalculatorA general bicycle frame size range from rider height, for road, mountain and hybrid bikes.E-bike rangeEstimated riding range from battery capacity and energy use per distance.Fishing reel line capacityHow much line of a new diameter fits on a reel, from a known spool capacity.Pool table room sizeMinimum room dimensions so a cue has room to swing on every shot.Sauna Calories BurnedA realistic, non-exaggerated estimate of calories burned during a sauna session, from resting metabolic rate.Skipping Rope Calories BurnedCalories burned skipping rope from your weight, session length and pace, using standard MET values.Battery Capacity Unit ConverterConverts battery capacity between mAh, Ah and Wh at a given voltage.Speed (km/h) CalculatorAverage speed in km/h from a distance and time, for running, cycling, driving or boating.Training Pace Zones CalculatorEasy, tempo, threshold and interval pace zones from a recent race time or known baseline pace.Steps to MilesConverts a step count to miles, or a target distance in miles to steps, from an average stride length.Beer Pong Cups CalculatorNumber of cups needed per side and in total for a triangle beer pong rack, for any rack size.Swim pacePace per 100 m/yd and average speed for a swim, from distance and time.Cycling power-to-weightWatts per kilogram from your power output and body weight, with a rough training category.Golf course handicapCourse handicap for a round, from Handicap Index, Slope Rating and Course Rating.Ape indexHow your arm span compares to your height, a rough climbing-reach indicator.Bike Pace CalculatorAverage pace per kilometre or mile and road speed from a distance ridden and the time it took.Arrow Kinetic EnergyKinetic energy and momentum of an arrow from its measured or chronographed speed and weight.Boat Speed (Horsepower) CalculatorRough top-speed estimate for a planing boat from engine horsepower and total weight, using the Crouch formula.FIDE Rating CalculatorFIDE-style Elo rating change after one game, using the published FIDE K-factor rules for player category.Cricket Strike Rate CalculatorBatting strike rate from runs and balls faced, or bowling strike rate from balls bowled and wickets taken.ERA (Earned Run Average) CalculatorA baseball pitcher's earned run average, scaled to a standard 9-inning game.MET CalculatorCalories burned from any MET value you enter, plus body weight and duration.Arrow FOC (Front of Centre) CalculatorFront of centre percentage for an arrow, from its length and balance point measured from the nock.VO2 Max Calculator (Cooper Test)Estimates VO2 max from the distance covered in a 12-minute Cooper test, with the equivalent pace.Bike chain lengthChain length in links for a bike from chainstay length and the largest chainring and cog.Baseball WHIPWalks plus hits per inning pitched, the standard measure of baserunners a pitcher allows.Winning percentageWin rate for a team or player, with ties counted as half a win.Batting average (baseball or cricket)Hitting average from hits and at-bats, or runs and dismissals for cricket.Slugging percentageTotal bases per at-bat, a power-hitting measure in baseball and softball.Goalie save percentageShare of shots faced that a goalkeeper stopped, hockey or soccer.Effective field goal percentage (eFG%)Basketball shooting efficiency that weights three-pointers as worth more.Cricket bowling averageRuns conceded per wicket taken, lower is better for a bowler.Earned run average (ERA)A pitcher’s earned runs allowed per nine innings pitched, baseball or softball.Calories burned by heart rateEnergy burned during exercise from average heart rate, age, weight and sex.Vertical leap needed to dunkMinimum vertical jump required to dunk a basketball, from your standing reach and rim height.Rowing ergometer pace to wattsConverts a rowing machine 500 m split time to power output, the Concept2 formula.Triathlon total timeAdds swim, transition, bike and run splits into a total triathlon finish time.On-base percentage (OBP)How often a batter reaches base safely per plate appearance, baseball or softball.Fielding percentageShare of fielding chances handled cleanly, baseball or softball defense.Bench press one-rep maxEstimated one-rep max (1RM) bench press from a weight and rep count, using the Epley formula.NBA game scoreJohn Hollinger’s single-game performance rating from a box score line.True shooting percentageBasketball shooting efficiency that accounts for three-pointers and free throws.MET-minutes per weekWeekly physical activity volume in MET-minutes, checked against the WHO activity guideline.Goals against average (hockey)A goaltender’s goals allowed per 60 minutes of play, the standard hockey goaltending stat.Cricket batting strike rateRuns scored per 100 balls faced, the standard measure of scoring pace in cricket.Steps to km calculatorConverts a step count to distance, or a target distance to steps, from an average stride length.VO2 max calculator for runnersEstimates VO2 max for a runner from a recent race distance and finish time (Jack Daniels formula).Pace calculatorSolves for pace, time or distance when the other two are known.One-rep max (1RM) estimatorEstimated one-rep max for any lift, from a weight and rep count, across four common formulas.

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