Win Loss Ratio Calculator
Calculate your win/loss ratio, win rate percentage, and winning streak statistics for any competitive activity. Enter your total wins and losses to instantly see your performance metrics — whether you track sports records, trading results, sales conversions, or gaming stats.
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What is Win Loss Ratio?
The win/loss ratio divides total wins by total losses to produce a simple performance metric. A ratio of 2.0 means you win twice for every time you lose. The win rate percentage (wins ÷ total games × 100) provides an alternative view: a 2:1 ratio corresponds to a 66.7% win rate. Both metrics are widely used in sports, trading, gaming, sales, and any competitive endeavor to measure and track performance.
Understanding your win/loss ratio in context is essential. In sports, the ratio varies dramatically by competition level — a 3:1 ratio in recreational play may equal a 1:1 ratio in professional competition. In trading, the win/loss ratio must be evaluated alongside the average win size versus average loss size (risk-reward ratio). A 40% win rate can still be profitable if average wins are significantly larger than average losses.
Formules et Équations utilisées
Ce calculateur s'appuie sur 5 équations fondamentales :
1 Win Loss Ratio ▼
45 wins and 30 losses: W/L = 45/30 = 1.50:1.
2 Win Rate Percentage ▼
45 wins in 75 games: Win Rate = (45/75) × 100 = 60%.
3 Profit Factor (Trading) ▼
30 wins × $500 avg / 20 losses × $400 avg = $15,000/$8,000 = 1.875.
Explore all calculation options on the Calculateur de Ratio home page.
Comment utiliser ce calculateur
Pour utiliser ce Calculateur de Ratio, suivez ces 3 étapes :
Saisir les Valeurs
Saisissez les valeurs de ratio connues dans les champs. Laissez un champ vide — c'est la valeur manquante que le calculateur va chercher à résoudre.
Choisir le Mode
Sélectionnez le mode de ratio — Résoudre, Simplifier ou Mettre à l'échelle. Chaque mode applique des formules différentes à vos valeurs.
Obtenir les Résultats
Cliquez sur Calculer. L'écran de résultats affiche la réponse avec une barre de ratio interactive, un diagramme circulaire et le détail des calculs.
Exemples Pratiques et Solutions Étape par Étape
Voici 3 exemples de calculs résolus avec les étapes détaillées grâce à ce calculateur :
Saisie 1 Team record: 42 wins, 28 losses
Saisie 2 Trading: 55 wins ($200 avg), 45 losses ($150 avg)
Saisie 3 Sales: 18 deals won, 32 lost, 10 pending
Foire Aux Questions
How do I calculate my win/loss ratio? ▼
Win/Loss Ratio = Total Wins ÷ Total Losses. If you have 75 wins and 50 losses, your ratio is 1.50 (or 3:2). If you have 30 wins and 30 losses, your ratio is 1.0 (even record). A ratio above 1.0 means more wins than losses.
What is a good win/loss ratio? ▼
It depends entirely on context. In major league baseball, 60% (1.5:1) is excellent. In casual gaming, 60% might be average. In day trading, 50% with a 2:1 reward-to-risk ratio is profitable. In sales, close rates of 20-30% are typical for complex B2B sales. Compare to your specific domain's benchmarks.
What is the difference between win rate and win/loss ratio? ▼
Win rate = Wins ÷ Total Games × 100 (a percentage). Win/loss ratio = Wins ÷ Losses (a ratio). With 60 wins and 40 losses: win rate = 60%, win/loss ratio = 1.5. Win rate accounts for total games; ratio only compares wins to losses directly.
How many games do I need for a reliable win rate? ▼
At least 30-50 outcomes for basic reliability, 100+ for moderate confidence, and 200+ for high statistical significance. With fewer than 30 games, a few lucky or unlucky results heavily skew the percentage. The larger the sample, the more stable and reliable the win rate becomes.
Can my win/loss ratio be negative? ▼
No. Wins and losses are non-negative numbers, so the ratio is always 0 or positive. A ratio of 0 means zero wins (0/N = 0). With zero losses, the ratio is technically undefined (division by zero) — most systems display it as the number of wins or infinity.
How do I account for ties in my win rate? ▼
Three common approaches: (1) Exclude ties and calculate only from decisive results. (2) Count each tie as 0.5 wins and 0.5 losses. (3) Use a points system (win=2, tie=1, loss=0). The method depends on your sport/activity's conventions. Specify which method you use for consistency.
What win rate do I need to break even in trading? ▼
It depends on your reward-to-risk ratio. With 1:1 risk-reward, you need 50% win rate to break even. With 2:1 (average win is twice average loss), you only need 33.3%. With 3:1, you need 25%. The formula: Break-even win rate = 1 ÷ (1 + Reward/Risk ratio).
How does win rate differ across sports? ▼
NBA: league average is 50% (41-41), elite teams reach 73% (60-22). NFL: 50% average, elite 75% (12-4). MLB: 50% average, elite 60% (97-65). Tennis grand slam champions often have 80%+ career win rates. Chess grandmasters typically maintain 60-70% against all rated opponents.
Should I track win rate by opponent or overall? ▼
Both. Overall win rate gives the big picture, but opponent-specific rates reveal matchup advantages and weaknesses. In sports, you might dominate weaker opponents (85%) but struggle against top teams (35%). This detail is hidden in the overall average (60%).
How do professional traders evaluate win/loss ratios? ▼
Professional traders evaluate win rate alongside average win size (R-multiple). The profit factor = (Win Rate × Avg Win) ÷ (Loss Rate × Avg Loss). A profit factor above 1.0 is profitable. Many successful traders have 40-50% win rates but average wins that are 2-3× larger than average losses.
What is the Kelly Criterion and how does it relate to win rate? ▼
The Kelly Criterion calculates the optimal position size based on your win rate and payoff ratio: Kelly % = Win Rate − (Loss Rate ÷ Payoff Ratio). With 55% win rate and 1.5:1 payoff: Kelly = 0.55 − (0.45/1.5) = 0.25 (bet 25% of bankroll). It maximizes long-term growth rate but requires accurate win rate data.