NRL Same Game Multi Calculator
Work out the payout and combined odds for any NRL SGM in seconds. Add up to 8 legs, plug in your stake, and see the maths instantly — including a fair-odds estimate to compare against what the bookies are offering.
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How SGM odds are actually calculated
The maths every sharp punter should know before placing a same game multi.
A same game multi (SGM) combines two or more bets from the same NRL match into one ticket — for example, the Storm to win + Cameron Munster to score a try + total points over 39.5. To win, every leg has to land.
The raw combined odds are simply each leg's decimal odds multiplied together:
Payout = Stake × Combined odds
Profit = Payout − Stake
So a $50 SGM with three legs at 1.85, 2.20 and 1.50 has raw combined odds of 6.105 and would pay out $305.25 — a $255.25 profit — if the bookmaker priced it at fair value.
They don't.
Why book SGM odds are lower than the maths
The correlation discount is real — and bigger than most punters realise.
Bookmakers reprice SGM legs because outcomes inside the same game are correlated. When Penrith wins by 13+, Nathan Cleary is far more likely to have scored a try. The book can't pay you the standalone odds for both legs without losing money long-term, so it shaves the price.
Typical SGM discounts on NRL markets sit between 10% and 35% off the raw combined odds, depending on how correlated the legs are:
- Low discount (5–10%): Independent markets — first try scorer + total points + alternate handicap from different periods of the game.
- Medium discount (15–25%): Most common SGMs — team to win + player to score, or winning margin + total points.
- Heavy discount (25–35%+): Tightly correlated legs — team to win by 13+ + their dominant player to score a try + alternate line on points.
The calculator above shows the fair price. Compare it to the bookmaker's price on the same SGM — if the book is within 10% of fair, that's a sharp ticket. If it's 30% lower, you're paying a heavy premium for the correlation.
Building better NRL SGMs
Four rules that turn SGMs from lottery tickets into long-term value plays.
- Keep it to 3–4 legs. Every leg you add is another way for the ticket to die. The variance grows faster than the price for most punters past 4 legs.
- Stack legs that tell the same story. If your read is "Storm dominate at home" then "Storm to win + Storm 13+ margin + total points under 41.5" is one consistent thesis. Don't mix contradictory legs.
- Avoid first try scorer in SGMs. First TS markets carry the biggest book margin in NRL (~14%). Use anytime try scorer instead — same player, much sharper price.
- Shop the price across books. Sportsbet, TAB, Ladbrokes and Pointsbet all price SGMs differently. The same 3-leg ticket can vary by 15–20% between books. Compare books.