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Best of 7 Calculator

Calculate win probabilities, series outcomes, and elimination scenarios for any best-of-7 series. Enter team names, game-by-game win probability, and track the live series score.

Win probability · All possible outcomes · Game tracker · Elimination scenarios · Series length distribution

Teams & Win Probability

Set each team's per-game win probability (must sum to 100%)

Team A: 50% Team B: 50%
50%
50%
%
Quick Presets

Series Score Tracker

Click a game to record who won — updates probabilities live

Team A
0
wins
–
Series in progress
Team B
0
wins
Game Results (click to record winner)
Series Progress
Live Series Odds
50%
Team A series win prob
Team A50.0%
Team B50.0%
Games played0 / 7
Wins needed (A)4
Wins needed (B)4
Comeback Probability

Probability of winning series when down 3–1 or 3–0 (at 50/50 per game)

Down 3–012.5%
Down 3–125.0%
Down 3–250.0%
Tied 2–250.0%
Up 3–087.5%
Up 3–175.0%
Up 3–250.0%
Bo7 Format
Games to win4
Max games7
Min games4
Possible outcomes70
At 50/50: Avg length~5.81 games
Sports Using Bo7
NBA PlayoffsAll rounds
NHL PlayoffsAll rounds
MLB PlayoffsLCS + WS
esports (LoL, Dota)Grand Finals