Betting Odds Converter

Odds format

Odds value

Stake ($)

American—

Decimal—

Fractional—

Implied probability—

Total payout—

Profit—

Free betting odds converter — enter American, decimal, or fractional odds and instantly see all three formats, implied probability, and payout on your stake, in one screen (no separate calculator needed).

This tool is for informational purposes only and is not a substitute for professional financial or medical advice. Consult a qualified professional before making decisions. See our Disclaimer.

How it works

Enter odds in American (+150/-200), decimal (2.50), or fractional (3/2) format
See the equivalent odds in all three formats plus implied probability
Enter a stake to see the payout and profit

Frequently asked questions

What do plus and minus mean in American odds?

Negative odds (like -200) show how much you'd need to bet to win $100 — the favorite. Positive odds (like +150) show how much you'd win on a $100 bet — the underdog.

Is this gambling advice?

No — this is a pure math and format-conversion tool. It doesn't recommend whether or what to bet.

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2026-09-28

Update history

2026-09-28 Launched: sport-agnostic American/Decimal/Fractional odds converter with implied probability and stake payout calculated in one screen. Entirely client-side, no hardcoded event odds.