Every betting math tool in one place — accumulators, full-cover system bets, each-way, staking, value and casino odds. Enter your numbers, see the return instantly. No sign-up, no betting, just the math.
Whether you are working out an accumulator, splitting a each-way horse bet, or checking whether a Lucky 15 is worth the extra outlay, these calculators do the math for you. Betting math is simple in principle — multiply your odds, multiply by your stake — but system bets, place terms and commission make it fiddly to do in your head. Each tool below handles one job well.
A double combines two selections, a treble three, and an accumulator four or more. Every leg must win; the odds multiply together, which is why a small stake can return a large amount.
Full-cover bets combine your selections into every possible multiple so you still get a return when only some of them win. In order of size: Trixie (3 selections, 4 bets), Patent (3, 7 with singles), Yankee (4, 11), Lucky 15 (4, 15), Canadian (5, 26), Lucky 31 (5, 31), Heinz (6, 57), Lucky 63 (6, 63) and the giant Goliath (8, 247). The "Lucky" bets and Patent include singles, so a single winner still returns.
The Kelly criterion tells you what fraction of your bankroll to stake based on your edge. Matched betting and arbitrage calculators show how to back and lay (or bet both sides across bookmakers) to lock in a guaranteed result. The odds converter switches between decimal, fractional and American formats and shows implied probability.
For card games, the poker pot odds calculator tells you the equity you need to make a profitable call, and the blackjack card counting tool converts a Hi-Lo running count into a true count.