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Official MLB scoring statistics and core sabermetrics for hitters and pitchers. Used by coaches filling out stat sheets…
Efficiency and rating statistics for the major team sports, each defined by a published league or analytics formula. Used by…
Handicap and scoring math governed by published rule sets: the World Handicap System for golf and USBC rules for ten-pin bowling…
Rating systems and tournament structure math shared by chess, esports and league sports. Used by tournament directors, club…
Odds format conversion, payout math and bankroll/value tools used by sports bettors and traders. Every tool works from stated…
Exact combinatorial probability and house-edge math for card games, table games and lotteries. Used by poker players studying…
External ballistics, scope adjustment, arrow setup and angling math for shooters, hunters, archers and anglers. Formulas follow…
Damage, drop-rate, dice and scale math for gamers and model builders. Used by MMO and ARPG theorycrafters, gacha players…
Most used in sports, games, gambling odds & hobbies
- Batting Average CalculatorMLB Official Baseball Rules, Rule 9.22Enter hits and at-bats and this calculator returns batting average to three decimal places exactly as an official scorer would…
- On-Base Percentage (OBP) CalculatorMLB Official Baseball Rules, Rule 9.22On-base percentage is the share of plate appearances in which a hitter reaches base by hit, walk or hit-by-pitch. This…
- Slugging Percentage, OPS & ISO CalculatorMLB Official Baseball Rules, Rule 9.22Slugging percentage is total bases divided by at-bats — the average number of bases a hitter earns per official trip to the…
- ERA Calculator (Earned Run Average)MLB Official Baseball Rules, Rule 9.16Enter earned runs and innings pitched and this calculator returns earned run average scaled to a full game — nine innings for…
- True Shooting Percentage CalculatorBasketball Reference / Dean Oliver shooting-efficiency definitionsTrue shooting percentage measures scoring efficiency across all three ways to score — two-pointers, three-pointers and free…
- NFL Passer Rating CalculatorNFL passer rating formula (adopted 1973)The NFL passer rating combines four passing rates — completion percentage, yards per attempt, touchdown rate and interception…
- Hockey Save Percentage CalculatorNHL official statistics definitionsSave percentage is the share of shots on goal a goaltender stops. Enter shots against and goals against and this calculator…
- Golf Handicap Index Calculator (World Handicap System)USGA/R&A Rules of Handicapping (World Handicap System), 2024 revisionA World Handicap System Index is the average of the lowest 8 Score Differentials in your most recent 20 rounds — not the…
- Course Handicap & Playing Handicap CalculatorUSGA/R&A Rules of Handicapping (World Handicap System), 2024 revisionYour Handicap Index is portable; your Course Handicap is not. This calculator applies the World Handicap System conversion —…
- Bowling Score Calculator (Ten-Pin Scoring)USBC Playing Rules, ten-pin scoringType your rolls and this calculator scores the game exactly as a league scoresheet does: an open frame is worth the pins you…
- Elo Rating Change CalculatorFIDE Rating RegulationsEnter your rating, your opponents' ratings and how each game finished, and this calculator returns your expected score, the…
- Betting Odds Converter & Implied Probability CalculatorEnter a price in any format - American moneyline, decimal, fractional or Hong Kong - and this calculator returns the other…