A Lucky31 takes the Lucky15 concept one selection further, covering five picks across 31 separate bets. That extra selection adds an entire layer of combinations — ten trebles instead of four, five fourfolds instead of one, plus a brand-new fivefold — making manual settlement genuinely impractical.
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This calculator handles the full 31-line breakdown automatically, including void/non-runner adjustments, each-way place returns, and the standard Lucky31 bonus offers. Enter your five prices and results to see exactly where every pound of return comes from.
📊 How to Use the Lucky31 Calculator
Enter your stake per line first, not your intended total outlay. A Lucky31 always has 31 lines, so even a modest £1 stake per line means a £31 total stake — £62 if each way is switched on.
A Lucky31 always contains exactly 31 bets from five selections: 5 singles, 10 doubles, 10 trebles, 5 fourfolds, and 1 fivefold accumulator.
Enter the decimal odds for each of your five selections and mark each one Won, Placed, Lost, or Void as results settle. If each way applies, choose the correct place terms fraction for the market before checking your final returns.
🔢 Calculator Fields Explained
Stake per Line – the amount wagered on each of the 31 individual bets, not the total stake.
Currency – the currency symbol used to display stakes and returns.
Win Only / Each Way – toggles whether every selection carries a place part alongside the win part.
Place Terms – the fraction of win odds paid for a placed result, when each way is active.
Selection Odds – the decimal price for each of the five legs.
Result – whether that selection Won, was Placed, Lost, or was Void/a non-runner.
1-Winner Consolation – toggles an offer that doubles the winning single’s return if only one of the five selections wins.
All-5 Winners Bonus – an optional percentage uplift some bookmakers add when all five selections win outright.
💰 Understanding the Results
| Result Field | What It Shows |
|---|---|
| Total Returns | Everything paid back across all 31 lines, plus any bonuses applied |
| Total Stake | Full outlay across all lines (doubled if each way) |
| Profit / Loss | Total Returns minus Total Stake |
| Bet Type Breakdown | Returns split by Singles, Doubles, Trebles, Fourfolds, and Fivefold |
The five-group breakdown table is especially useful on a Lucky31, since the extra selection creates a much wider spread of combination sizes than a Lucky15 — a single missing leg can still leave a meaningful cluster of trebles and doubles standing.
A Lucky31 can show an overall loss even with three or four winners, if the losing legs were needed to complete the largest fourfolds and the fivefold.
Focus on the Total Returns figure against Total Stake, rather than the raw winner count — four short-priced winners can still underperform a Lucky31 with three winners at longer odds.
📐 Calculation Formulas
| Component | Formula |
|---|---|
| Line odds (win part) | Product of decimal odds of all non-void legs in that combination |
| Line odds (place part) | Product of [1 + (decimal odds − 1) × place fraction] for each non-void leg |
| Void leg handling | Void legs are dropped from the combination; a fourfold with one void leg pays out as a treble |
| Total stake | 31 × stake per line × (2 if each way, else 1) |
Dropping a void leg from a combination is mathematically identical to simply not including it — a fourfold with one non-runner settles exactly as a treble on the remaining three legs.
📝 Practical Examples
Example 1 – Four winners out of five. Five selections at 2.5, 3.0, 2.0, 4.0, and 1.8, £2 per line, win only. Four win and one loses. Every single, double, treble, and fourfold not touching the losing leg pays out, plus a wide spread of combinations — but the fivefold and any group containing the loser lose.
Example 2 – One winner with consolation. Same five prices, £2 per line, but only selection 1 (2.5) wins. Without consolation, only that single pays £5 against a £62 stake. With the consolation bonus enabled, that single return doubles to £10.
The 1-winner consolation only ever boosts the single bet’s return — it cannot turn any of the doubles, trebles, fourfolds, or the fivefold into winners, since those still require every leg in them to have won.
Example 3 – Void selection. Selection 4 is declared a non-runner. Its single is refunded in full, and every double, treble, fourfold, or the fivefold containing it reduces to a bet on the remaining four selections — effectively turning the bet into a smaller Lucky15-style system plus a refund.
Example 4 – All five winners with bonus. All five selections win, each way, 1/4 place terms, with a 20% all-winners bonus enabled. Every win-part and place-part line across all 31 bets pays out, and the entire total then gets boosted by 20% on top of an already-complete clean sweep across all five legs.
💡 Tips & Best Practices
Always confirm your bookmaker’s exact each-way place terms before betting — the fraction can vary by sport and by field size, and using the wrong one here will misrepresent your place returns.
Check whether the 1-winner consolation offer is currently running on a Lucky31 specifically; some bookmakers only extend this promotion to the Lucky15, not the larger Lucky31.
Remember that a Lucky31’s 31-bet structure means the total stake is more than double a Lucky15’s for the same per-line price — treat the per-line figure, not the “Lucky31” label, as your real staking decision.
If one of your five selections is a clear standout, consider whether a Lucky15 or Canadian on the remaining four might better match your risk appetite than paying for the full extra layer of combinations a fifth selection adds.
Toggling each way on and off for the same five prices quickly shows how much of your potential return the place part is actually contributing, especially once ten trebles and five fourfolds are involved.
Keep a record of the exact place terms and bonus offers live when you placed the bet, since these details matter if a settlement query comes up later.
For horse racing specifically, always recheck the number of runners in each race, since place terms usually depend on field size and can shift the fraction paid on a placed result.
⚠️ Common Mistakes to Avoid
Confusing Stake per Line with Total Stake
The most common Lucky31 error is entering an intended total outlay into the field expecting the per-line stake.
Entering £31 as your “stake” when you meant a £31 total outlay effectively places a £961 bet (31 lines × £31), a 31x overstake that’s easy to miss until after the bet is placed.
Always divide your intended total stake by 31 (or by 62 if each way) before entering the per-line figure.
Forgetting Each Way More Than Doubles the Complexity
Because each way adds a place part to every one of the 31 lines, the total stake effectively doubles compared to the win-only version at the same per-line price.
A £2 each-way Lucky31 costs £124 total, not £62 — a gap that catches out bettors who only mentally budget for the win-only stake on a bet this large.
Always check the total stake figure the calculator shows rather than estimating it from the per-line amount alone.
Assuming Void Legs Simply Vanish From the Bet
A void or non-runner selection doesn’t just disappear from every line in the way some bettors expect.
Instead, every combination containing it reduces to a bet on the remaining legs — a fourfold with one void leg becomes a treble, not a void line itself.
Overlooking Bonus Offer Conditions on a Larger Bet
The 1-winner consolation and all-5-winners bonuses are promotional offers, not universal rules of the Lucky31 bet type, and terms often differ from the equivalent Lucky15 offer.
Always confirm current terms specifically for the Lucky31 before assuming either bonus applies at the same rate as a smaller system bet.
🎯 When to Use This Calculator
This calculator suits anyone who has already placed, or is considering placing, a five-selection Lucky31 and wants an exact potential return under different result scenarios — before or after the events finish.
A Lucky31 exists for bettors who want even broader accumulator-style coverage than a Lucky15 without an all-or-nothing risk profile — this calculator turns that trade-off into real numbers instead of a rough guess.
It’s equally useful for comparing win-only versus each-way versions of the same five prices, or for checking exactly how much a bookmaker’s consolation or all-winners bonus is worth in cash for your specific selections.
🔗 Related Calculators
Lucky15 Calculator, Yankee Calculator, Canadian Calculator, Trixie Calculator, Patent Calculator, Each Way Calculator
📖 Glossary
Lucky31 – a 31-bet system covering all singles, doubles, trebles, fourfolds, and the fivefold accumulator across five selections.
Single – a bet on one selection alone.
Double – a bet requiring both selections in a pair to win.
Treble – a bet requiring all three selections in a group of three to win.
Fourfold – a bet requiring all four selections in a group of four to win.
Fivefold – the single bet requiring all five selections to win.
Each Way – a bet split into a win part and a place part.
Place Terms – the fraction of win odds paid for a placed result.
Non-Runner – a selection withdrawn before the event, treated as void.
Void Bet – a line neither won nor lost; stake refunded.
Consolation Bonus – a promotional offer doubling the winning single’s return if only one selection wins.
System Bet – a bet covering multiple combinations of selections rather than one single accumulator.
Decimal Odds – odds expressed as a single multiplier of the stake, including the stake itself.
❓ Frequently Asked Questions
How many bets are in a Lucky31?
A Lucky31 always contains exactly 31 bets from five selections: 5 singles, 10 doubles, 10 trebles, 5 fourfolds, and 1 fivefold accumulator.
This count is fixed regardless of odds or results — even if four of the five selections lose outright, the bet still technically consisted of 31 separate lines when it was placed.
What happens if one of my five selections is a non-runner?
A void selection is dropped from every combination it appears in — its single is refunded, and any double, treble, fourfold, or the fivefold containing it settles as a bet on the remaining four legs only.
In practice, a Lucky31 with one non-runner behaves very similarly to a Lucky15 on the four remaining selections, plus a refunded single.
Is a Lucky31 worth it if only one selection wins?
Only the single bet on that one winning selection pays out under normal terms, so the return is usually far smaller than the total stake unless the winning price was very large.
This is exactly the scenario the 1-winner consolation bonus is designed to soften — many bookmakers double that single winning bet’s return specifically for this outcome.
What’s the difference between a Lucky15 and a Lucky31?
A Lucky31 adds a fifth selection and covers 31 total bets instead of 15, including an extra layer of trebles, a full set of fourfolds, and a fivefold accumulator not present in a Lucky15.
This means a Lucky31 costs roughly double a Lucky15 at the same per-line stake, but also spreads risk across a wider set of combinations.
Can a Lucky31 lose money even with four winners out of five?
Yes — if the four winners are short-priced favorites and the fifth, losing selection was needed to complete the highest-value fourfolds and the fivefold, the returns from the working singles, doubles, and trebles can still fall short of the total stake.
This is precisely why checking the calculator’s Profit/Loss figure directly, rather than just counting winners, matters on a bet this size.
Do all bookmakers offer the same Lucky31 bonuses as a Lucky15?
No — the 1-winner consolation and all-5-winners bonus percentages are promotional terms set individually by each bookmaker, and some run different rates (or no offer at all) for a Lucky31 compared to a Lucky15.
Always check your bookmaker’s current terms and conditions for the specific offer live at the time you placed your Lucky31 bet.
⚖️ Legal Disclaimer
This calculator is provided for informational and educational purposes only. Bonus terms, consolation offers, and place terms vary by bookmaker and by promotion, and this tool relies on the figures you enter rather than any live bookmaker feed. Always confirm your specific bookmaker’s exact terms before placing a bet. Gambling involves financial risk; please gamble responsibly and only with money you can afford to lose.
Lucky31s are brutal for accumulator betting on esports because you’re stacking five picks and needing most of them to hit just to break even. I’ve been burned on these with CS:GO lineups where a stand-in player gets subbed in after odds are set, and suddenly your fourfold is dead even though three legs printed. The calculator handles voids properly at least, which matters when rosters change mid-tournament. But honestly the real problem is the bet structure itself—you’re paying for 31 separate lines when maybe two or three of those combinations actually matter. On tight esports markets where value is razor-thin, the math works against you hard. Stick to singles or proper parlays if you’re trying to make money.