Sport calculators
Pace, training zones, one-rep maxes and scoring — for planning a session, pacing a race, or settling a number after one. Zones built on an estimated maximum heart rate can be off by 10 to 20 bpm, so use a measured value whenever you have one.
Backpacking Food Weight CalculatorEstimate how much your trail food will weigh from trip length, calories and food calorie density, with a safety buffer.Bike Gear Ratio CalculatorChainring and cog teeth to gear ratio, gear inches, metres of development, Sheldon Brown gain ratio and speed at your cadence, with a full gear chart.Boxing punch power calculatorImpact force is the effective striking mass times the change in speed over the contact time (F = m·v/t); the punch also carries momentum m·v and kinetic energy ½·m·v². Enter the mass behind the fist, the fist speed and the contact time.Calories burned calculatorEstimate calories burned during an activity (MET method).Climbing Grade ConverterConvert climbing grades between YDS, French, UIAA, British trad, Ewbank and Saxon for roped routes, and between the V-scale and Fontainebleau for bouldering.Cooper 12-Minute Run CalculatorEstimate VO₂max and your fitness category from the Cooper 12-minute run test, from the distance you covered, your age and sex.
Army Body Fat CalculatorThe US Army AR 600-9 tape method, with the pass/fail limit for your age band.Bench Press CalculatorYour bench 1RM, the load for every rep range, and where it sits against your bodyweight.Body Recomposition CalculatorMaintenance calories, protein target and an honest feasibility score for losing fat while gaining muscle.FFMI CalculatorFat-free mass index — the muscularity measure that height-corrects where BMI cannot.Lean Body Mass to Strength CalculatorPredict your squat, bench and deadlift from lean mass, and score how much of that potential you've realised.Lift percentage of 1RM calculatorFind the weight to load for a given percentage of your one-rep max.
At-bats per home run (AB/HR) calculatorAt-bats per home run shows how often a hitter goes deep: AB/HR = at-bats ÷ home runs. A lower number means more frequent power — elite sluggers sit around one homer every 10–15 at-bats.Basketball rebound percentage (TRB%) calculatorEstimate the percentage of available rebounds a player grabbed while on the court (TRB%).Batting average calculatorCompute a baseball or softball batting average from hits and at-bats.Bowling score calculatorA full ten-pin bowling scorecard you fill in ball by ball. Tap how many pins fell on each throw and it applies the real rules — a strike scores 10 plus your next two balls, a spare 10 plus your next ball, and the 10th frame allows three throws — showing the frame-by-frame grid with X, / and running totals, plus undo and example games from a perfect 300 to a beginner card.Effective field goal percentage (eFG%) calculatorEffective field goal percentage adjusts the standard FG% to credit three-pointers with the extra point they are worth: eFG% = (FGM + 0.5·3PM) ÷ FGA × 100. It gives a fairer picture of a shooter's efficiency than raw field goal percentage.ERA (earned run average) calculatorEarned run average is the classic pitching stat: the earned runs a pitcher allows per nine innings. ERA = (earned runs × 9) ÷ innings pitched. Innings use the .1 = ⅓, .2 = ⅔ notation, so 180.2 means 180 and two-thirds innings.