Free Treble Bet Calculator
Enter your stake and the odds for 3 selections to calculate combined odds, total return, net profit, and implied probability.
Use decimal odds greater than 1.00 (example: 1.80).
What is a treble bet?
A treble (also called a 3-fold accumulator) combines three individual selections into one single bet. To win, all three selections must be correct. If even one leg loses, the whole treble loses.
The reason many bettors use trebles is simple: returns can be much larger than placing three separate single bets. That bigger payout comes with higher risk, since all outcomes must land.
How the treble calculator works
This calculator multiplies your three odds together to create the combined treble price, then applies your stake.
- Combined Decimal Odds = Leg 1 × Leg 2 × Leg 3
- Total Return = Stake × Combined Decimal Odds
- Net Profit = Total Return − Stake
- Implied Probability = (1 ÷ Combined Decimal Odds) × 100
If you enter fractional or American odds, the tool first converts them to decimal behind the scenes so calculations stay consistent.
Example treble calculation
Sample Inputs
- Stake: $20
- Selection 1: 1.80
- Selection 2: 2.20
- Selection 3: 1.65
Combined odds = 1.80 × 2.20 × 1.65 = 6.53 (rounded).
Total return = $20 × 6.53 = $130.68.
Net profit = $130.68 − $20 = $110.68.
That illustrates why trebles are popular: modest stakes can produce large potential returns. But remember, all three selections still need to win.
Odds format quick guide
Decimal odds
The most straightforward format. Decimal includes your stake in the return. Example: decimal 2.50 means a $10 stake returns $25 total.
Fractional odds
Common in UK markets. Fractional 3/1 means you profit $3 for every $1 staked, plus your original stake back.
American odds
Common in US sports betting. Positive odds (+150) show profit on a $100 stake. Negative odds (-120) show how much you need to stake to profit $100.
Common mistakes when calculating trebles
- Mixing odds formats without converting first.
- Confusing total return with profit.
- Using impossible American values (like 0 or tiny values near zero).
- Forgetting a treble requires all three picks to win.
Smart ways to use a treble calculator
- Compare multiple treble combinations before placing a bet.
- Check whether the risk/reward is actually worth it.
- Test different stake sizes to manage bankroll exposure.
- Use implied probability to sanity-check very long-shot slips.
Frequently asked questions
Does a treble include my stake in the return?
Yes. Total return includes stake + profit. Net profit removes the original stake.
Can I use this for soccer, horse racing, or basketball?
Yes. A treble is a math structure, not a sport-specific bet type. As long as you have valid odds, the same formula applies.
What if one selection is void?
Rules depend on your sportsbook. In many cases, a void leg is treated as odds of 1.00 and the treble effectively becomes a double. Always confirm your bookmaker terms.
Final note
This betting treble calculator is for educational and planning purposes. Bet responsibly, set limits, and never wager money you cannot afford to lose.