System Bet Calculator(2026)

A system bet is a wager built from multiple selections that automatically creates several smaller bets covering different combinations. Unlike a straight accumulator that pays only if every leg wins, a system bet still returns money if some legs lose — depending on how many winners you have.

A Yankee uses 4 selections to create 11 bets: six doubles, four trebles, and one 4-fold accumulator. You need at least two winners to get any return. Total stake equals 11 × your per-bet stake.

Lucky 15 is a Yankee plus 4 singles — total 15 bets from the same 4 selections. Lucky 15 returns money even with just one winner (because of the singles), while Yankee needs at least two winners. Lucky 15 costs more upfront because it has 4 extra bets.

A Heinz uses 6 selections to create 57 bets: 15 doubles, 20 trebles, 15 4-folds, 6 5-folds, and 1 6-fold accumulator. It is named after the famous '57 varieties' slogan. With $1 per bet, total stake is $57.

For each combination size (doubles, trebles, etc.), generate every possible group of selections. Multiply the odds within each group — if all legs in that group win, that combination returns stake × multiplied odds. Sum all winning combinations to get your total return.

Both use 3 selections. A Trixie has 4 bets (3 doubles + 1 treble) and needs 2+ winners. A Patent has 7 bets (Trixie + 3 singles) and returns money even with 1 winner. Patent costs more but is more forgiving.

Mathematically, system bets have the same expected value as the underlying singles and accumulators they contain. They reduce variance compared to a single accumulator but increase total stake. They are a risk-management tool, not a profit hack.

Yes. The math depends only on odds, not on the sport. You can build a system bet from football matches, tennis games, horse races, basketball, esports, or any combination of the above. Just enter the decimal odds for each selection.

An accumulator is a single bet where every leg must win for any return. A system bet is multiple smaller accumulators built from the same selections, so partial wins still pay out. Accumulators have higher max payouts but zero return on partial wins.

Lucky 15 = 4 selections, 15 bets (Yankee + 4 singles). Lucky 31 = 5 selections, 31 bets (Canadian + 5 singles). Lucky 63 = 6 selections, 63 bets (Heinz + 6 singles). All three include singles so one winner guarantees some return.

A Goliath uses 8 selections to create 247 bets — 28 doubles, 56 trebles, 70 4-folds, 56 5-folds, 28 6-folds, 8 7-folds, and 1 8-fold accumulator. It is the largest standard system bet. With $1 per bet, total stake is $247.

Most bookmakers use the same individual selection odds for system bets as for singles. However, some operators add a small margin specifically on combination bets, so the implied probability of the multiplied odds is slightly worse than the individual prices suggest.

Three common causes: (1) the bookmaker rounds differently — fractional vs decimal odds conversions can drop pennies; (2) some bookmakers apply a system bet margin not visible in the displayed odds; (3) place terms or each-way splits change the calculation for racing markets. For straight singles in win-only markets, the math should match exactly.

If you want one winner to guarantee some return, start with a Patent (3 selections, 7 bets) or Lucky 15 (4 selections, 15 bets). Both include singles, which protect against having only one correct pick. Avoid Heinz/Goliath until you understand the cost: a Lucky 63 with $5 per bet is $315 total, not $5.