Free Lucky 31 calculator
5 selections, 31 bets — 5 singles + 10 doubles + 10 trebles + 5 fourfolds + 1 fivefold. Single-winner safety net plus standard bookmaker bonuses.
| Type | Bets | Stake | Win | Place | Return |
|---|---|---|---|---|---|
| Total | 0 | £0.00 | £0.00 | £0.00 | £0.00 |
What a Lucky 31 actually is
A Lucky 31 is the 5-selection sibling of the Lucky 15. You pick five selections and the bookmaker writes 31 bets: 5 singles, 10 doubles, 10 trebles, 5 fourfolds, and 1 fivefold accumulator. A £1 Lucky 31 costs £31 total. It is a Canadian with the 5 singles added — and the singles unlock the bookmaker bonus payouts that pure Canadians don't get.
Two bonuses are standard at UK retail: a single-winner bonus (typically 2x or 3x the odds on the one winning leg if only one of your 5 lands) and an all-5-winners bonus (typically a 10–25% uplift on the total return when every selection wins). Like Lucky 15, the bonuses tilt the EV without ever fully closing the bookmaker's margin gap.
Worked example — five winners at 4/6
Five short-priced selections at 4/6 (1.67 decimal), £1 unit stake — total outlay £31. Settling each component:
- 5 singles × (£1 × 1.67) = £8.33
- 10 doubles × (£1 × 2.78) = £27.78
- 10 trebles × (£1 × 4.63) = £46.30
- 5 fourfolds × (£1 × 7.72) = £38.58
- 1 fivefold × (£1 × 12.87) = £12.87
Total return before bonuses = £133.86 on £31 outlay — a profit of £103. With a typical 10% all-winners bonus, total becomes about £147.25 for a profit of £116. Not a jackpot — but at 4/6, you weren't going to get one. What you bought was a high-strike-rate slip with five short-priced winners, and the Lucky 31 structure converted that into a 4.7× return.
And with only one winner at 4/6? You collect the single (£1.67) plus a 2x odds bonus (extra £1.67) = £3.34 on £31. Net loss £27.66 — most of your stake. The Lucky 31 singles cushion is genuinely useful but it doesn't work miracles at short prices.
Lucky 31 vs Canadian vs Lucky 63
The three options when you're committed to a 5- or 6-selection full-cover bet:
| Bet type | Selections | Bets | Singles? | Bonuses? |
|---|---|---|---|---|
| Canadian | 5 | 26 | No | No |
| Lucky 31 | 5 | 31 | Yes (5) | Standard |
| Lucky 63 | 6 | 63 | Yes (6) | Standard |
Lucky 31 is the singles-bonus version of a Canadian. If your 5 picks are short-priced and you want the single-winner cushion, Lucky 31 is the right call. If you've got 6 picks, step up to Lucky 63 — but the unit price doubles, so be sure you actually have 6 selections you fancy.
Why bigger doesn't mean better value
Thirty-one bets compound the bookmaker's margin across every leg, and the fivefold and fourfolds carry the most concentrated overround. The bonus structure narrows the edge but rarely closes it. The overround hiding inside every leg you back is the cornerstone read on how margin actually compounds — essential before stacking into 30+ bet wagers.
Related tools and guides
- Betting Calculator — full multi-mode calculator: accumulator, system bets, lay, free bet, arbitrage.
- Canadian Calculator — same 5 selections without singles (26 bets, cheaper, no bonuses).
- Lucky 15 Calculator — the 4-selection equivalent (15 bets, same bonus structure).
- Lucky 63 Calculator — the 6-selection version of the same idea (63 bets).
- Odds Converter — Decimal ↔ Fractional ↔ American with implied probability.