Jackpot odds calculator: legs, outcomes and your real chance
A jackpot slip asks you to be right on every match. This calculator multiplies the results per leg by itself once for each leg, which is all the arithmetic there is, and shows the count of combinations, the chance of one blind line and the chance of the usual bonus tier, one leg wrong. It makes no prediction.
Result for 13 legs with 3 results each
- Possible combinations
- 1,594,3233 multiplied by itself 13 times
- Chance that one line gets every leg right
- 1 in 1,594,3230.0000627 percent
- Chance of exactly 12 correct
- 1 in 61,320the usual bonus tier: one leg wrong, any leg
- Lines you would need to cover every result
- 1,594,323one line per combination; the pool does not change this
Illustrative example. Equal chances per result; a real match is not a coin toss and a real slip has its own rules for void legs and bonus tiers.
Worked table: 13, 15 and 17 legs
Three results per leg, every result equally likely. These are the figures the calculator starts from, so the page says the same thing with or without JavaScript.
| Legs | Combinations (3 to the power of legs) | Every leg right | Exactly one leg wrong | Two-way legs instead (2 to the power) |
|---|---|---|---|---|
| 13 | 1,594,323 | 1 in 1,594,323 | 1 in 61,320 | 8,192 |
| 15 | 14,348,907 | 1 in 14,348,907 | 1 in 478,297 | 32,768 |
| 17 | 129,140,163 | 1 in 129,140,163 | 1 in 3,798,240 | 131,072 |
How the arithmetic works
Each leg of a jackpot has a fixed set of possible results. A 1X2 leg has three: home win, draw, away win. When legs are independent, the number of ways the whole slip can fall is the product of the results per leg, so a 13-leg 1X2 slip has 3 multiplied by itself 13 times, which is 1,594,323 combinations. Exactly one of those combinations is the one that happens. A line chosen without any knowledge of the teams therefore has a chance of 1 in 1,594,323. That figure is a property of the slip, not of the operator, the pool or the day.
The same rule gives the near miss. With every result equally likely, a 13-leg line gets exactly 12 right when one particular leg is wrong and the other 12 are right. There are 13 legs that could be the wrong one and two wrong results each, so 26 of the 1,594,323 combinations give exactly 12 correct: about 1 in 61,320. Many Kenyan slips pay a smaller bonus for that tier, and the operator's own rules decide how the bonus pool is shared.
What your own estimate changes
Real matches are not equally likely to end in each result. If you type a chance per leg, the calculator uses it for every leg and raises it to the power of the number of legs. Illustrative example: a line where each pick is right 60 times in 100 has a chance of 0.6 multiplied by itself 13 times, about 1 in 766, and over 17 legs about 1 in 5,857. That is far better than a blind line and still a long way from likely. A real slip mixes strong favourites and toss-ups, so the honest figure lies between the two; the calculator cannot know which legs are which, and neither can a tipster.
What the calculator does not do
It does not pick matches, it does not rate operators, and it does not account for tax, void legs or bonus tiers, all of which are set by law or by the operator's rules rather than by arithmetic. Under section 2 of the Gambling Control Act, 2025 a jackpot is the highest prize from a displayed combination in a game of chance, paid from a fixed prize schedule or an accumulating prize pool, and the size of that pool has no effect on the probability shown here. The guides on winnings and tax, settlement and bonus tiers cover the rest, each with its section cited.
Illustrative example throughout. The arithmetic is exact; the assumption that every result is equally likely, or equally likely at the single figure you type, is not. Nothing on this page is a prediction or an invitation to bet. 18+. Gambling is addictive. Play responsibly.
Questions people ask
Why does the pool size not change my odds?
The pool is the prize, not the chance. A 17-leg slip has 129,140,163 combinations whether the pool is small or record-breaking, so the probability of a blind line is 1 in 129,140,163 either way. A bigger pool only changes what you would win, and under the Third Schedule to L.N. 112 of 2026 prizes above KES 50,000,001 are paid within thirty working days after verification rather than immediately.
What does double chance do to the numbers?
A two-way leg has two results instead of three, so the combinations become 2 to the power of the legs: 8,192 for 13 legs, 32,768 for 15 and 131,072 for 17. Fewer combinations means a better chance per line, which is why slips with two-way legs usually carry smaller prizes. Select 2 results per leg in the calculator to see the full table.
Does the calculator include tax on the prize?
No. Tax is set by the Income Tax Act and the Excise Duty Act, not by probability. As at 1 July 2026 the Third Schedule to the Income Tax Act, Head B, paragraph 5(i), sets withholding on withdrawals made by punters at 5 percent, and paragraph 5(r) sets 20 percent on winnings from a lottery or prize competition. The winnings and tax guides work through examples with the sections and dates cited.
Can I use this to pick a winning line?
No, and no tool can. The calculator shows how unlikely any single line is; it has no information about the teams. A service that claims a certain result for 13 or 17 matches is making a claim the arithmetic rules out, and regulation 9 of the Gambling Control (Advertising) Regulations, 2026 forbids approved gambling adverts from depicting gambling as a source of income or using testimonials.