- Maths reviewed by Josh Miller
- Tested by Diana Westfield
A system bet calculator works out bets like 2/3 or 3/5, where you back every combination of a fixed size from your picks. A 2/3 system is three doubles on three selections. At £5 a bet that’s £15, and with picks at 2/1, 6/4 and 3/1 the free CasinoCalcs calculator above returns £147.50 if all three win. If only two win, one double still pays, between £37.50 and £60 depending on which two.
System bet calculator: how the bets are counted
“k/n” means every k-fold from n picks. The number of bets is the number of ways to choose k from n:
| System | Made of | Bets | Fewest winners for a return |
|---|---|---|---|
| 2/3 | 3 doubles | 3 | 2 |
| 2/4 | 6 doubles | 6 | 2 |
| 3/4 | 4 trebles | 4 | 3 |
| 3/5 | 10 trebles | 10 | 3 |
| 4/6 | 15 four-folds | 15 | 4 |
Pick any system from 2/3 up to 7/8 in the Bet type list. Stakes can be per bet or for the whole system, and each way, Rule 4 and dead heats work as in the main bet calculator.
System bets against full-cover bets
A system covers one size of multiple. A full-cover bet covers all of them: a Yankee on four picks is the 2/4, the 3/4 and the four-fold together, 11 bets. A system is cheaper but less forgiving. With a 3/4, one loser leaves you a single treble, and two losers return nothing.
System bets are common with European bookmakers, often listed as “system 2 from 3” or “2/3”. UK and Irish bookies sell the same thing as doubles or trebles in a multiples menu. For the classic three-pick bet with singles too, see the Patent calculator.
On football this is what people call a permutations bet. Use it as a football permutations calculator: pick, say, 2 from 5 for ten doubles, and see the cost and returns.
To play every Yankee or Patent from a bigger list of picks instead, use the permed bet calculator.
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