Sports & fitness tools

Race predictions, training paces, strength scores, scoring math and match simulators — educational estimates, not coaching advice.

Most popular

Barbell Plate Calculator

Which plates to put on each side of the bar for any target weight.

Climbing Grade Converter

Convert between YDS, French, UIAA, Ewbank routes and V-scale ↔ Font boulders.

Cycling Speed & Power Calculator

Physics model: speed from watts (or watts from speed) with CdA, rolling resistance and grade.

Darts Checkout Calculator

Best checkout routes for any score from 2 to 170, finishing on a double.

Elo Rating Calculator

Expected score and rating change for any two Elo ratings and K-factor.

Golf Handicap Calculator (WHS)

World Handicap System index from your last rounds, plus course handicap.

Playoff Series Probability Calculator

Chance of winning a best-of-3/5/7 series from your single-game win probability.

Power-to-Weight (W/kg) Calculator

FTP watts per kilogram, rider level and all seven Coggan training zones.

Race Time Predictor

Predict your 10K, half and marathon time from any recent race result.

Rowing Split ↔ Watts Converter

Concept2 split to watts, calories per hour and projected times for 2k, 5k and more.

Soccer Score Simulator (Poisson)

Win/draw/loss and most likely scorelines from two expected-goals numbers.

VDOT Running Calculator

Daniels VDOT and easy/marathon/threshold/interval training paces from a race result.

Wilks & DOTS Calculator

Powerlifting scores: DOTS, classic Wilks and IPF GL points from your total.

Running & Endurance

Race Time Predictor

Predict your 10K, half and marathon time from any recent race result.

VDOT Running Calculator

Daniels VDOT and easy/marathon/threshold/interval training paces from a race result.

Age Grading Calculator

Compare race times across ages: age-graded percentage and open-class equivalent.

Heat & Altitude Pace Adjuster

Adjust your goal pace for hot weather and race altitude.

Marathon Fueling Calculator

Carbs per hour, total gels and a fueling schedule for your race duration.

Race Split Calculator

Per-km or per-mile split table for a goal time, with even or negative split pacing.

Swim Pace & CSS Calculator

Critical swim speed from 400/200 m tests, training zones and SWOLF score.

Treadmill Incline Converter

Convert treadmill speed and incline into the equivalent flat outdoor pace.

Triathlon Time Calculator

Total race time from swim pace, bike speed, run pace and transitions.

Sweat Rate Calculator

Liters per hour from pre/post weigh-in, with a per-hour drinking plan.

Cycling & Rowing

Cycling Speed & Power Calculator

Physics model: speed from watts (or watts from speed) with CdA, rolling resistance and grade.

Power-to-Weight (W/kg) Calculator

FTP watts per kilogram, rider level and all seven Coggan training zones.

Rowing Split ↔ Watts Converter

Concept2 split to watts, calories per hour and projected times for 2k, 5k and more.

Bike Frame Size Calculator

Road, MTB and hybrid frame size from your height and inseam.

Bike Gear Ratio Calculator

Gear ratio, gear inches, development and speed at cadence for any chainring/cog.

Bike Tire Pressure Calculator

Front and rear starting pressures from rider weight and tire width.

Climb Time & VAM Calculator

How long a climb takes at your watts, with VAM and speed.

Strength & Gym

Barbell Plate Calculator

Which plates to put on each side of the bar for any target weight.

Wilks & DOTS Calculator

Powerlifting scores: DOTS, classic Wilks and IPF GL points from your total.

Strength Standards Calculator

Is your squat, bench, deadlift or press untrained, novice, intermediate, advanced or elite?

Sinclair Calculator (Weightlifting)

Olympic weightlifting Sinclair total from bodyweight and snatch + clean & jerk.

Scoring & Stats

Darts Checkout Calculator

Best checkout routes for any score from 2 to 170, finishing on a double.

Golf Handicap Calculator (WHS)

World Handicap System index from your last rounds, plus course handicap.

Batting Average & OPS Calculator

AVG, OBP, SLG and OPS from a baseball batting line.

Bowling Score Calculator

Ten-pin score from frame notation with strikes, spares and the tenth frame.

Cricket Run Rate Calculator

Current and required run rate, projected score and the chase equation.

Decathlon & Heptathlon Points Calculator

World Athletics combined-events points from your marks in all ten (or seven) events.

Passer Rating Calculator

NFL passer rating and NCAA efficiency from completions, yards, TDs and INTs.

Pythagorean Expectation Calculator

Expected wins from points scored and allowed — MLB, NBA, NFL, NHL and soccer exponents.

True Shooting % Calculator

Basketball TS%, effective FG% and per-36 stats from a box score line.

Vertical Jump Calculator

Jump height from flight time or reach difference, plus Sayers peak power.

ERA & WHIP Calculator

ERA, WHIP, K/9, BB/9 and K/BB from a pitching line.

Net Run Rate Calculator

Tournament NRR from runs and overs scored and conceded.

Sprint Wind & Altitude Adjuster

Correct 100 m and 200 m times for wind reading and altitude.

Stableford Points Calculator

Hole-by-hole Stableford points from par, stroke index and your gross score.

Ratings & Simulators

Elo Rating Calculator

Expected score and rating change for any two Elo ratings and K-factor.

Playoff Series Probability Calculator

Chance of winning a best-of-3/5/7 series from your single-game win probability.

Soccer Score Simulator (Poisson)

Win/draw/loss and most likely scorelines from two expected-goals numbers.

Badminton Match Probability Calculator

From serve-rally win % to game and match probability with the 30-point cap.

League Season Simulator

Monte Carlo the rest of the season: title, top-N and relegation odds from the current table.

Squash Match Probability Calculator

From serve-rally win % to game and match probability with PAR-11 scoring.

Table Tennis Match Probability Calculator

From serve-point win % to game, deuce and match probability for best-of-3/5/7.

Tennis Match Probability Calculator

From serve-point win % to game, set, tiebreak and match probability.

Volleyball Match Probability Calculator

From serve-rally win % to set and match probability, indoor or beach.

Penalty Shootout Probability Calculator

Shootout win odds from each team’s conversion rate, including sudden death.

Converters & Sizing

Climbing Grade Converter

Convert between YDS, French, UIAA, Ewbank routes and V-scale ↔ Font boulders.

Ski Binding DIN Calculator

ISO 11088-style release value from weight, height, age, skier type and boot length.

Ape Index Calculator

Wingspan minus height — the climber’s reach metric, as difference and ratio.

About these tools

Sports and fitness calculators for athletes and fans alike: race time prediction, VDOT training paces, cycling power estimates, strength scores such as Wilks and DOTS, golf handicaps, darts checkouts, Elo ratings and Poisson-based match simulators. Every tool explains the model it uses, so you know what the numbers mean and where their limits are.