calculator
Odds Converter
Convert American ↔ Decimal odds and instantly see implied probability.
Inputs
Enter either format — we’ll fill the other automatically.
Tip: Implied probability is the break-even win rate at the given odds.
Results
Conversion + break-even probability.
Use this before EV / No-Vig so you’re working off the right numbers — not guesswork.
Why odds matter
If you don’t understand what the price means, you can’t know if a bet is good.
Odds are the language of betting — they tell you how much you win and (more importantly) the
break-even probability you need to be profitable long-term. If a line implies a team has a 52.4%
chance to win, and you believe their real chance is 56%, that gap is an edge. When you can quickly convert odds
and check implied probability, you stop betting “vibes” and start comparing price vs. true probability.
That’s the difference between random gambling and disciplined, repeatable decision-making.
- Enter American odds (ex: +120 / -110) or Decimal odds (ex: 1.91).
- The other format fills automatically.
- Use Implied probability as the break-even win rate.
- If your “true probability” is higher than implied, you’ve found value.