Thunderball Odds Calculator

Thunderball is the UK National Lottery’s fixed-top-prize two-drum game: five main numbers from 1–39 plus a Thunderball from 1–14, at £1 a line. The top prize is £500,000, not a rolling Saturday jackpot. Operator: Camelot historically, Allwyn since February 2024. Multiple draws each week (the cadence has included Tuesday, Wednesday, Friday, Saturday; check the current Allwyn calendar). This calculator still uses Tickets, Ticket Price, Jackpot, Main Matches and Bonus Matches. Start with Tickets: distinct £1 Thunderball boards for one drawing. Ten lines is Tickets = 10. Do not enter a week’s worth of nights as Tickets unless you bought that many boards in a single draw.

Ticket Price defaults to 1. Leave it. There is no Power Play equivalent. Jackpot defaults to 500000 and should almost always stay there. Thunderball does not roll a mega prize; if nobody hits 5+1 the £500,000 is simply not paid that draw (lower tiers still pay). Overriding Jackpot is only useful if you want a sensitivity check, not because Allwyn advertised a different top prize. Typing a UK Lotto rollover into this field is a mistake.

Main Matches is 0–5 on the 5/39 pool. Bonus Matches is the Thunderball, 0 or 1, from 14 numbers. The £500,000 prize is Main Matches = 5 and Bonus Matches = 1. Matching five mains and missing the Thunderball is the next official tier (£5,000). Matching the Thunderball with fewer mains is how most “I won something” tickets happen, because 1/14 is a fat extra ball. Set Bonus Matches = 1 when the Thunderball is correct; 0 when it is not. This is not UK Lotto: here you do pick the extra ball, and the field exists.

Calculate. Jackpot Odds is 1 in C(39,5)×14 = 1 in 8,060,598. That is the friendliest jackpot denominator on this nine-game list, which is why the prize is capped at £500,000 instead of rolling to £50 million. This Prize Odds is your hypergeometric pattern. Jackpot Chance = 1−(1−p)^tickets. One hundred lines in one draw is about 1 in 80,606 at the top prize. This Prize Chance follows the chosen tier. Jackpot EV = tickets×(500000×jackpotP − 1) at defaults: 500000/8,060,598 − 1 ≈ £0.062 − £1 = −£0.938 per line. Expected Jackpot Return ≈ £0.06. Lower fixed prizes (the published Thunderball table) add return the EV line ignores. Sharing of the £500,000 among multiple 5+1 winners is ignored; it can happen, and when it does each winner’s payout falls, which the printed EV does not reflect.

Thunderball launched in 1999 as the National Lottery’s cheaper, easier, fixed-prize companion to Lotto. You pick five numbers from 39 and one Thunderball from 14. Cost is £1. Top prize is £500,000. Draws run several times a week; the exact weekday set has been tweaked over the licence periods, but it has always been more frequent than Lotto’s Wednesday/Saturday pair. Camelot ran it until Allwyn took the National Lottery licence in February 2024. Same retailer network as UK Lotto and UK EuroMillions; different matrix, different prize philosophy.

There is no famous rolling jackpot because there is nothing to roll. The “famous” Thunderball outcome is hitting £500,000, which has happened many times across more than two decades, usually to a single ticket, occasionally split. That is a different cultural object from the EuroMillions €250 million cap or the 6/59 Must Be Won Saturday. People buy Thunderball because the odds are printable (1 in 8.06 million) and the stake is a pound. They should still see that £500,000 / 8,060,598 ≈ 6.2 pence of expected top-prize return per pound, before lower rungs.

Compared with UK Lotto: Thunderball is 5+1 versus 6, 39+14 versus 59, £1 versus £2, fixed £500k versus rolling jackpot, bonus ball you pick versus bonus ball you do not pick. Compared with EuroMillions: not even close in difficulty or prize. Compared with U.S. Powerball: Thunderball is a different country’s product with a top prize that is 4,000 times smaller than a $2 billion annuity and odds that are 36 times easier. Compared with Cash4Life: both are “capped dream” products, but Thunderball pays a lump £500,000, not £1,000 a day, and it is Allwyn, not a U.S. state lottery.

Prize table below £500,000 is a ladder of fixed amounts for 5+0, 4+1, 4+0, 3+1, 3+0, 2+1, 1+1, and 0+1. The 0+1 rung (Thunderball only) is why so many tickets “win”: C(39,5) in the miss-all-mains term times 1/14. This calculator will give you that odds cell if you set Main Matches = 0 and Bonus Matches = 1; it will not look up the official pound payout for you. Use the Allwyn table for amounts, this page for probabilities.

If your slip is Lotto 6/59, this matrix understates difficulty by a factor of five and a half. If your slip is Set For Life (5/47 + Life Ball 1/10, weekly stipend), go to that calculator instead. Thunderball is the £1, 5/39 + 1/14, £500,000 game, multiple weekly draws, Allwyn/Camelot, United Kingdom only.

Thunderball is the National Lottery’s fixed half-million: five from thirty-nine and a Thunderball from fourteen, at one pound a line. Camelot launched it in 1999; Allwyn inherited the licence in 2024. Several draws run each week. The top prize is five hundred thousand pounds, not a rolling Saturday jackpot. Combinatorics: 1 / [C(39,5)×C(14,1)] = 1/8,060,598. That is the friendliest first-category denominator among the official matrices in this lecture, which is why the prize is capped in six figures instead of rolling to fifty million.

Main combinations: C(39,5) = 39×38×37×36×35 / 120 = 575,757. Multiply by fourteen Thunderball faces: 575,757×14 = 8,060,598. Matching five mains is already one in 575,757; the extra ball makes the advertised top one in 8.06 million. If nobody hits 5+1, the half-million is simply not paid that draw; lower rungs still pay. There is no rollover identity that repairs a bad week’s expectation.

Hypergeometric mains: C(5,k)×C(34,5−k)/C(39,5). Thunderball: one fourteenth or thirteen fourteenths. Five mains without the Thunderball: (1/575,757)×(13/14) = 13/8,060,598, one in 620,046, the five-thousand-pound class in the published table. Four mains plus the Thunderball: C(5,4)×C(34,1)/575,757 × 1/14 = 170/8,060,598, about one in 47,415. Zero mains plus the Thunderball: C(34,5)/575,757 × 1/14 with C(34,5) = 278,256, so 278,256/8,060,598, about one in 29, which is why so many tickets “win something.” Each published rung that cares about the extra ball multiplies the mains hypergeometric by one fourteenth.

Fifty lines: 1−(1−1/8,060,598)^50 ≈ 50/8,060,598, about one in 161,212 at five hundred thousand. Expected top-prize pounds are 500,000/8,060,598 ≈ 0.062 against one pound, so jackpot-only expectation is about minus 0.94 a line. No advertised climb repairs that. Sharing between two 5+1 winners would halve the 500,000 in the formula. A full prize-table expectation adds the fixed lower rungs times their hypergeometrics and remains a house game, which is how a lottery can post a half-million at eight million to one without insolvency.

This is not 6/59 Lotto and not Set For Life’s monthly salary. Keep five from thirty-nine times one from fourteen, one pound, fixed £500,000, Allwyn retail, United Kingdom only.