01
Pick your mode
Use Single for one pick, Parlay/Acca for an all-must-win multi, and System/Round Robin when you want smaller combo bets instead of one all-or-nothing ticket.
Betting Tools
LiveBet Calculator: Parlay, System & ROI Payout Estimator Tool
Free multi-mode bet calculator for parlays, systems, and single bets. See exact profit, ROI, and implied odds instantly. No signup. HTML5, mobile-friendly.
Single · Parlay · SystemRisk meter + Monte CarloFree · No signup
Estimated profit$100.00LowView result
BET CALCULATOR
BET CALCULATORBet calculator for singles, parlays, accas and systems
Choose the slip type and odds format once, enter the stake and odds, then check payout, ROI and risk before you bet.
Single: one pick, one stake·Enter stake and one odds line.
All odds use
$USD
Enter the amount you plan to stake. Results update instantly.
Tap to enter odds in the selected format. Profit and ROI update as you type.
PROFIT
$100.00
TOTAL PAYOUT
$200.00
ROI
+100.00%
RISKLow
View detailed results
PROFIT
$100.00
Money on top of your stake.
TOTAL PAYOUT
$200.00
Stake + profit. What lands in your wallet.
ROI
+100.00%
Profit ÷ stake. A quick way to compare slips.
RISK
LowTier from implied probability — see legend below.
PROFIT
$100.00
Money on top of your stake.
TOTAL PAYOUT
$200.00
Stake + profit. What lands in your wallet.
ROI
+100.00%
Profit ÷ stake. A quick way to compare slips.
RISK
LowTier from implied probability — see legend below.
How is this result calculated?The tool converts every format to Decimal first, then uses the same payout math for singles, parlays/accas and system bets.
Implied probability = 1 ÷ Decimal odds
Parlay hit rate = multiply each leg's implied probability
Profit = stake × (Decimal − 1)
ROI = profit ÷ total outlay
How system bets are handled
The system tab creates every 2/N, 3/N or 4/N round-robin combo with the same stake per combo. The headline card shows the all-legs-win case; the ladder shows what different numbers of winning legs can return.
Quick example
$100 at Decimal 2.50 returns $250 total, with $150 profit and 150% ROI. A three-leg parlay with each leg priced at 50% has only a 12.5% combined hit rate.
Low ≥ 50% · Medium 30–50% · High < 30%
HOW IT WORKS
Pick a slip. Add odds. Check the payout.
Use one odds format for the whole slip by default. Add your stake and lines, then read profit, payout, ROI and risk before you place the bet.
02
Type stake and odds
Choose the odds format once, then enter every line in that format. If a slip really mixes formats, open the advanced per-leg setting.
03
Read the cards, then the chart
Start with profit, total payout and ROI. If you want the long-run picture, expand the simulator and look at the spread, not just the average.
ODDS LADDER
Common odds lines at your stake
Use this as a quick odds ladder before you pick a line. Profit and payout use the stake above; the risk tag follows the same implied-probability rule as the calculator.
| Decimal | American | Hong Kong | Implied prob. | Profit | Total return | Risk |
|---|---|---|---|---|---|---|
| 1.50 | -200 | 0.50 | 66.7% | $50.00 | $150.00 | Low |
| 1.80 | -125 | 0.80 | 55.6% | $80.00 | $180.00 | Low |
| 2.00 | +100 | 1.00 | 50.0% | $100.00 | $200.00 | Low |
| 2.50 | +150 | 1.50 | 40.0% | $150.00 | $250.00 | Medium |
| 3.00 | +200 | 2.00 | 33.3% | $200.00 | $300.00 | Medium |
| 4.00 | +300 | 3.00 | 25.0% | $300.00 | $400.00 | High |
| 6.00 | +500 | 5.00 | 16.7% | $500.00 | $600.00 | High |
$100 — $100
RISK TIERS
What the risk tags mean
The tag comes from implied probability. It is not a prediction, but it is a fast way to see whether a line is closer to even money, a live underdog, or long-shot territory.
Low
Low — likely outcomes
Implied probability ≥ 50%. These are favourites or near-even lines. Payout is smaller, but this is where most flat-stake betting starts.
Medium
Medium — competitive markets
Implied probability between 30% and 50%. These are competitive underdog or plus-money spots: more variance, but still realistic enough for normal stake sizing.
High
High — long-shot territory
Implied probability < 30%. This is long-shot territory. Many parlays and accas end up here even when each leg looks short, so keep stake size under control.
LONG-TERM ROI SIMULATORRun 1,000 Monte Carlo trials on your lineUse this only when you want the longer view. It repeats the same stake and odds across 1,000 simulations, then shows the spread of outcomes — not just the average. The orange band is the middle 80%; the white line is the median path.
Pick a horizon. Short runs are dominated by luck; long runs converge to the math.
Trials
1,000
FINAL MEAN PROFIT
$17.80
Where the average run ends after the chosen number of bets. Treat it as a baseline, not a promise.
TRIALS IN PROFIT
46.3%
Share of simulated runs that finished above water at the final checkpoint.
P10–P90 SPREAD
$2,600.00
How wide the middle 80% of outcomes are. Wider spread means more bankroll swing.
Win probability is computed as 1 ÷ decimal. This treats the bookmaker's line as the true probability — a useful baseline. If you have an edge, your real long-run mean would shift upward; if the line carries vig, it shifts downward.
This is a calculator, not betting advice. It uses the odds you enter and standard payout math; final settlement always depends on the sportsbook's confirmed slip, market rules and any void, push, cash-out or bonus-bet terms.
FAQ
Common questions about bet calculation
The questions bettors usually check before placing a slip: payout math, void legs, accas, system stakes, same-game parlays and odds formats.
How do I calculate profit and total return on a single bet?
Profit = (decimal odds − 1) × stake. Total payout = decimal odds × stake. So a $100 single at 2.50 pays $250 back: $150 profit plus the original $100 stake.
How are parlay, accumulator or acca odds multiplied?
Every leg is converted to Decimal first, then multiplied. Example: 2.00 × 1.91 × 2.10 = 8.022. A normal parlay/acca needs every leg to win, so the payout grows fast but the hit rate drops fast too.
What happens if one parlay leg is void, pushed or cancelled?
In most sportsbooks, a void, push or cancelled leg is treated as Decimal 1.00, so it neither wins nor loses and the parlay is recalculated using the remaining valid legs. Final settlement still depends on the bookmaker's own rules.
What do 2/N, 3/N and 4/N system bets mean?
A system bet, also called a round robin in some markets, splits your picks into smaller combos. 2/N creates every double, 3/N every treble and 4/N every four-fold. You may still get a return without every leg winning.
How is total stake calculated for a system bet?
Total stake = stake per combination × number of combinations. For example, five selections in a 2/N system create 10 doubles. If you stake $10 per combo, your total outlay is $100.
Why might the calculator differ from my sportsbook payout?
Common reasons are odds movement, rounding, void/push legs, cash-out, free bets, bonus stakes or local settlement rules. The calculator uses the odds you type in; the confirmed sportsbook slip decides the final payout.
Can I use this for same-game parlays?
Use it only as a rough payout check. Same-game parlay legs are often correlated, so sportsbooks reprice them instead of simply multiplying each leg like a normal accumulator. The final in-app SGP price is the number that matters.
How do I enter Hong Kong, Malay or Indonesian odds?
Choose the odds format shown on your betting screen, then type the price exactly as displayed. The calculator converts Hong Kong, Malay and Indonesian odds to Decimal first, then calculates single, parlay and system returns from that Decimal value.
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DEEPER CONTEXT
Long-form on the XYES Blog
Checked the numbers? Open the sportsbook.
XYES Sportsbook keeps Decimal odds front and centre, with Hong Kong, American, Malay and Indonesian views for cross-checking. Use the calculator to sanity-check the slip, then place it with 0.30%–1.10% sports rakeback on every settled bet.