Odds Calculator & Converter
Convert odds between formats and calculate profit on any stake. The default format below is set to fractional — the standard used by bookmakers in Ireland.
€
Decimal Odds —
Fractional —
American —
Implied Probability —
Profit —
Total Return —
Quick Reference: Odds Conversion Table
| Decimal | Fractional | American | HK | Implied % |
|---|---|---|---|---|
| 1.25 | 1/4 | -400 | 0.25 | 80% |
| 1.50 | 1/2 | -200 | 0.50 | 66.7% |
| 1.67 | 4/6 | -150 | 0.67 | 59.9% |
| 1.80 | 4/5 | -125 | 0.80 | 55.6% |
| 2.00 | Evens | +100 | 1.00 | 50% |
| 2.50 | 3/2 | +150 | 1.50 | 40% |
| 3.00 | 2/1 | +200 | 2.00 | 33.3% |
| 4.00 | 3/1 | +300 | 3.00 | 25% |
| 5.00 | 4/1 | +400 | 4.00 | 20% |
| 6.00 | 5/1 | +500 | 5.00 | 16.7% |
| 10.00 | 9/1 | +900 | 9.00 | 10% |
| 21.00 | 20/1 | +2000 | 20.00 | 4.8% |
Frequently Asked Questions
What odds format is used in Ireland?
Ireland bookmakers predominantly use fractional odds. You can usually toggle to other formats in account settings.
How do I convert decimal odds to fractional?
Subtract 1 from the decimal odds, then express as a fraction. e.g. 2.50 − 1 = 1.5 = 3/2 fractional.
How do I calculate profit from decimal odds?
Profit = (Decimal Odds − 1) × Stake. e.g. odds of 2.50 on a €10 stake: profit = (2.50 − 1) × 10 = €15.
What do negative American odds mean?
Negative American odds (e.g. -150) show how much you must stake to win $100. -150 means stake $150 to win $100 profit (total return $250).