Age-graded running compares a runner's performance with a reference standard for their age and sex, producing an age-grade percentage and an equivalent reference time.
Age Grade % = (World Standard Time for Age & Sex / Actual Race Time) × 100%Explore sports and performance concepts behind calculators for training zones, pace, golf, running, scoring, and athletic planning.
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Age-graded running compares a runner's performance with a reference standard for their age and sex, producing an age-grade percentage and an equivalent reference time.
Age Grade % = (World Standard Time for Age & Sex / Actual Race Time) × 100%Ape Index calculates ape index — arm span minus height — for climbing and fitness, as a difference and a ratio.
Barbell plate loading determines the optimal combination of weight plates to load on each side of an Olympic barbell to reach a target lift weight.
Weight per Side = (Target Total Weight - Barbell Weight) / 2Batting Average calculates batting average, OBP, SLG, OPS, ISO, BABIP, and wOBA — plus season projections and historical comparisons.
Bench Press calculates bench press 1RM with warm-up sets, grip/style corrections, Wilks/DOTS scores, and a 5/3/1 + Smolov Jr training planner.
Bike Gear Ratio calculates bicycle's gear ratio, gear inches, and development (meters per pedal revolution) from the chainring, cog, and wheel size, plus speed at a cadence.
Bowling Score calculates full 10-frame bowling score frame by frame, including strikes, spares, and the tenth-frame bonus balls.
A chess Elo rating estimates playing strength from previous ratings and game results. A player's expected score and rating change depend on the rating difference and the rating system's factor.
R_new = R_old + K × (Actual Score - Expected Score)Evaluate cricket statistics including Batting Strike Rate, Net Run Rate (NRR), and Bowling Average with economy rate.
Cycling Power-to-Weight Ratio calculates cycling power-to-weight ratio (W/kg) from FTP and body weight, with category ratings.
Deadlift estimates deadlift 1RM with 7 formulas, see strength level, and calculates 5/3/1 or Texas Method training weights.
A DIN ski binding setting calculates the precise release torque threshold for alpine ski bindings based on skier weight, height, age, skier type (I, II, III), and ski boot sole length (mm).
ISO 11088 standardizes DIN release torque settings to prevent lower leg injuriesDunk calculates vertical jump needed to dunk a basketball from height, standing reach, and the rim height (10 ft).
Fantasy Baseball Points compares fantasy baseball players with ESPN, Yahoo, CBS, or custom points rules.
Fantasy Football Points calculates fantasy football points using Standard, Half-PPR, or Full PPR scoring configurations.
Fielding Percentage calculates fielder's fielding percentage from putouts, assists, and errors, plus total chances.
Goalie Save Percentage & GAA calculates hockey goalie Save Percentage (SV%) and Goals Against Average (GAA) with NHL performance benchmarks.
Heart Rate Zone determines training heart rate zones for cardio fitness.
Hiking Time estimates hiking time, calories, and water needs using Naismith's Rule.
Marathon Pace calculates marathon splits and target finish time.
Moneyline Bet calculates sports betting payouts, profit, implied probability, and ROI from moneyline odds in American, decimal, or fractional format.
NFL Passer Rating computes official NFL and NCAA passer ratings using passing yards, touchdowns, completions, and interceptions.
Olympic weightlifting totals combine the snatch and clean-and-jerk results. Related scores can adjust the total for body weight, weight class, or federation standards.
Total = Best Snatch (kg) + Best Clean & Jerk (kg)On-Base Percentage calculates batter's on-base percentage (OBP) from hits, walks, hit-by-pitch, at-bats, and sacrifice flies, plus OPS with slugging.
OPS calculates OPS, OBP, SLG, and OPS+ from batting stats with performance tier ratings.
Parlay Bet calculates parlay odds, payout, and profit for 2-15 leg bets in American, decimal, or fractional odds with leg-by-leg breakdown.
Pickleball DUPR Rating estimates pickleball skill rating from a self-assessment of skills and match results, mapped to the DUPR and USAP rating scales.
Player Efficiency Rating computes approximated linear Player Efficiency Rating (aPER) using comprehensive box score metrics.
A point spread is a sports betting handicap set by oddsmakers to level the playing field between two unequal teams, requiring the favorite to win by a margin or the underdog to stay within it.
Covering the Spread requires Final Score + Handicap > Opponent ScoreA powerlifting total is the combined weight lifted in the squat, bench press, and deadlift. Strength scores can then adjust the total for body weight and competition standards.
Powerlifting Total = Squat + Bench Press + DeadliftPredict race finish times across distances using the Riegel and Cameron formulas.
Race fueling plans marathon or ultra endurance nutrition, estimating required carbohydrates per hour, hydration, sodium targets, and energy gel timing.
Target: 30–60g carbs/hr for 1–2.5 hr races; up to 90g carbs/hr (2:1 glucose:fructose) for ultra eventsRace Pace calculates race pace, splits, and finish time predictions.
Racket Sport Rating calculates racket sport skill rating, win probability vs opponents, and estimated rating change using an Elo-style formula.
Running Calorie calculates calories burned while running or jogging.
Running training paces derive target speeds for easy runs, tempo workouts, interval training, and race pace based on VDOT fitness scores.
Easy, Marathon, Threshold (Tempo), Interval (VO2 Max), and Repetition paces derive from Jack Daniels VDOTSlugging Percentage calculates batter's slugging percentage (SLG) from singles, doubles, triples, home runs, and at-bats, plus total bases and ISO.
Soccer xG estimates shot xG on an interactive soccer pitch and save a one-team match log. A free illustrative model, with no sign-up.
Squat estimates squat 1RM using 7 formulas, finds strength level, and build a training plan.
Stride length is the distance covered from the heel strike of one foot to the next heel strike of the same foot during running or walking.
Estimated Walking Stride = Height (in) × 0.413; Running Stride = Height (in) × 1.15 to 1.35A swim split is the time or pace for a segment of a swim. Split calculations can compare per-length, per-100-meter, pool, open-water, and triathlon pacing.
Triathlon pace estimates total race time from swim pace, bike speed, run pace, transition time, and the selected race distance.
Total Time = Swim Time + T1 + Bike Time + T2 + Run TimeTrue Shooting % calculates basketball player's true shooting efficiency by taking into account field goals, three-pointers, and free throws.
WHIP calculates pitcher's Walks plus Hits per Inning Pitched with Elite-to-Poor tier ratings.
Winning Percentage calculates team's winning percentage based on wins, losses, and ties. Get standings format, performance tier, and scenario planning for remaining games.
Youth Sports Cost estimates yearly cost of a child's sport: registration, equipment, tournaments, travel, and coaching, with rec vs travel-team tiers and multiple kids.