Win Percentage Calculator Formula

Understand the math behind the win percentage calculator. Each variable explained with a worked example.

Use the Win Percentage Calculator

Formulas Used

Win Percentage

win_pct = round((wins + ties * 0.5) / total_games * 1000) / 1000

Win %

win_pct_display = round((wins + ties * 0.5) / total_games * 1000) / 10

Total Games

total_games_display = total_games

Games Above .500

games_above_500 = wins - losses

Variables

VariableDescriptionDefault
winsWins45
lossesLosses30
tiesTies/Draws7
total_gamesDerived value= wins + losses + tiescalculated

How It Works

How Win Percentage Is Calculated

Formula

Win % = (Wins + 0.5 x Ties) / Total Games

Ties count as half a win and half a loss for percentage purposes.

Context

  • .500: Break-even
  • .600+: Playoff contender
  • .700+: Elite season

    • Worked Example

    45 wins, 30 losses, 7 ties.

    wins = 45losses = 30ties = 7
    1. 01Total games = 45 + 30 + 7 = 82
    2. 02Win % = (45 + 0.5 * 7) / 82 = 48.5 / 82 = 0.591
    3. 03Games above .500 = 45 - 30 = 15

    Ready to run the numbers?

    Open Win Percentage Calculator