Baseball Stat Calculators
Free baseball statistics calculators: figure ERA, batting average, slugging percentage, OBP, OPS, WHIP, and fielding percentage, plus find the right bat size.
Hitting Stat Calculators
Measure offensive performance with the core hitting statistics, from batting average to the on-base and slugging numbers that drive OPS.
Batting Average Calculator
Calculate a batting average from hits and at-bats. AVG = hits / at-bats, shown as a three-decimal number like .305.
Slugging Percentage Calculator
Calculate slugging percentage (SLG) from singles, doubles, triples, home runs, and at-bats. SLG = total bases / at-bats.
OBP Calculator
Calculate on-base percentage (OBP) from hits, walks, hit-by-pitch, at-bats, and sacrifice flies. OBP = (H + BB + HBP) / (AB + BB + HBP + SF).
OPS Calculator
Calculate OPS (On-base Plus Slugging) by adding on-base percentage and slugging percentage. Enter OBP and SLG directly or the underlying stats.
Pitching & Fielding Calculators
Evaluate run prevention and defense with ERA, WHIP, and fielding percentage.
ERA Calculator
Calculate a pitcher's Earned Run Average (ERA) from earned runs and innings pitched. ERA = (earned runs x 9) / innings pitched.
WHIP Calculator
Calculate a pitcher's WHIP (Walks plus Hits per Inning Pitched) from walks, hits, and innings pitched. WHIP = (walks + hits) / innings pitched.
Fielding Percentage Calculator
Calculate fielding percentage from putouts, assists, and errors. FPCT = (putouts + assists) / (putouts + assists + errors).
Equipment Sizing
Pick the right gear with our baseball bat size guide based on your height and weight.
Quick Jump to Section
About Our Baseball Stat Calculators
Our collection of baseball calculators helps athletes of all levels track their performance, set realistic goals, and optimize their training. Whether you're a beginner looking to complete your first 5K or an experienced marathoner aiming for a personal best, these free tools provide the insights you need.
All calculators use scientifically validated formulas and are designed to be easy to use on any device. Simply enter your data and get instant results that you can use to plan your training and track your progress.