Start with the total cash stake
A £1 Trixie contains four £1 component bets, so it costs £4. A £1 Lucky 15 contains fifteen £1 components and costs £15. The stake printed beside a system name may be the amount per component. Do not subtract £1 from a whole-system return unless £1 really was the total outlay.
Switch to “Total combined stake” if that is the amount on your receipt. The tool requires an exact split in whole pence; it does not silently round each line and change the total amount you entered.
Read a system as a list of smaller bets
Selections A, B and C in a Trixie create A+B, A+C, B+C and A+B+C. Each line has its own stake. Decimal odds multiply within a line; the line returns are then added. A loss kills the lines containing that selection. It does not erase unrelated winning lines.
A void does not erase a component stake
A void contributes a multiplier of one inside each original component. For a £1 Trixie at 2.00, 3.00 and 4.00, with A void and B/C won, the four lines return £3, £4, £12 and £12: £31 in all. The two £12 returns remain separate because two original bets carried separate £1 stakes.
Pending is a state, not a win
The result separates confirmed returns from a conditional total. A line containing a known loss is already lost, even when another selection is pending. A surviving pending line is marked explicitly. Its displayed amount assumes its remaining selections win and is not a forecast or a payment due.
Rounding and supported range
Each component is calculated using exact fractions and rounded to the nearest penny, half pennies up, before the component returns are added. This can differ from rounding only the final sum. Combined cash stake is limited to £100,000; very large unsupported outputs are rejected.
Use the Trixie breakdown, Yankee examples or Lucky 15 examples for a slower walkthrough.
Source and calculation scope
Sky Bet: bet types is the reference for the named system structures. Reviewed . Component returns and scenarios here are our own calculations, not an operator quotation. See methodology and rounding.