Blackjack mechanics & rules
Basic strategy was mathematically proven by Roger Baldwin in 1956 and refined by Edward O. Thorp using computer simulations.
Payouts are determined by multiplying the unit stake by the cumulative price of each winning selection or combination line. If any selection is scratched or declared non-runner/void, standard rules settle that leg at neutral odds of 1.00.
Worked example: Blackjack
Holding a Hard 16 against a dealer upcard of 10: basic strategy dictates Late Surrender (forfeiting 50% of your stake) if available, saving money compared to hitting (which busts ~62% of the time). If surrender is unavailable, hit.
Always check bookmaker maximum payout caps and race terms before placing high-volume system bets.
Blackjack inputs & settings
Odds Format & Stake Sizing
Enter odds in optimal move or switch between decimal, fractional, and moneyline formats. Ensure you verify whether you are entering unit stake per bet or total budget.
Settlement Conditions
Select the result for each pick (Won, Placed, Dead Heat, Void, or Lost) to calculate precise return figures.
CALCULATOR QUESTIONS
Blackjack questions
How does a void leg affect a blackjack?
When a selection is void, postponed, or scratched, that specific leg counts as a 1.00 multiplier (money returned for that leg), and the multiple bet rolls down into the remaining folds.
What is the difference between unit stake and total stake?
Unit stake is the amount wagered on each individual bet or line. Total stake equals the unit stake multiplied by the total number of bets in the multiple or system wager.
Are gambling and betting winnings taxed?
Taxation of sports betting winnings varies by country; consult your local tax authority or revenue service.