Betting Guide
My Bookie Betting Guide
Odds formats, multi maths, bankroll rules and sport-by-sport strategy explained simply.
Smart betting starts with understanding the maths. This guide walks through odds formats, how parlays compound, when hedging actually helps, what a fair bankroll looks like and how to read the most common sport-specific markets. Nothing in here will guarantee a winning ticket, but each section will help you avoid the costly mistakes that punish casual punters.
The Australian default is decimal odds, so 2.20 means a $1 stake returns $2.20 if the bet wins, including the original stake. American odds use plus and minus notation where +120 means $1 wins $1.20 and minus 150 means you need to stake $1.50 to win $1. Fractional odds, common in UK racing, express profit relative to stake.
Use The Bonus Bet Wisely
Odds Formats
Decimal, fractional and American compared with worked examples.
Multi Maths
How parlays compound and why same game multis price differently.
Value & Edge
What expected value means and how to spot a soft line.
Bankroll Rules
Unit sizing, stop losses and the discipline that separates winners from losers.
30+
Sport guides
5 min
Per article
Plain
English
100%
Free
| Format | Quote | Stake $10 returns |
|---|---|---|
| Decimal | 2.20 | $22.00 |
| American | +120 | $22.00 |
| Fractional | 6/5 | $22.00 |
| Decimal odds-on | 1.50 | $15.00 |
| American odds-on | -200 | $15.00 |
What is value in betting and how do I find it?
Value means a price that pays more than the true probability of the outcome. If you assess a market as fifty fifty and the bookmaker offers 2.10, you have value because the fair price is 2.00. Finding value comes down to building your own model or reading the market against your own knowledge of the sport. The simplest way to start is to compare prices across two or three reputable books and look for lines that move slowly because the action is quiet. Niche sports, lower-tier leagues and in-running markets tend to offer the softest prices.
Learn the odds
Decimal is the default in Australia. Get comfortable converting to and from American format.
Pick a sport
Stick to leagues you watch. Edge usually comes from knowledge the algorithm cannot see.
Size your bet
Stake in units. One to two percent of bankroll per wager is a sensible cap.
Track every bet
A simple spreadsheet shows you what is working and what is not within a month.
"Cleared up multi maths in five minutes. The unit sizing chapter changed how I bet completely."
Renee, Brisbane
Beginner
"Same game multi explainer is the clearest version I have read. Now I know why some legs are not allowed together."
Owen, Sydney
Footy bettor
"The exotics section is gold. Trifecta box pricing finally makes sense."
Sara, Cairns
Racing fan
Why does the bookmaker have an edge and how big is it?
Bookmakers price markets with an overround, also called the vig or juice. The implied probabilities of all outcomes on a market add to more than one hundred percent, and the gap is the bookmaker margin. On a coin flip with no edge the fair price is 2.00 either way. A typical Australian sportsbook might price both sides at 1.91, baking in around a four to five percent margin. The edge varies by sport and market depth, with mainstream lines tending to be tighter than exotic specials. Long term winners beat the vig by finding spots where their own probability estimate differs enough from the market to overcome the margin.