Most office pools are won and lost on a handful of games each week. You pick the obvious favourites like everyone else, then the season turns on the coin-flip games and the upsets you did or did not call. The good news is that you do not have to guess at those games blind. Sportsbook lines are a public, constantly updated estimate of each team's chances, and you can use them to make better pool picks without placing a single bet.
Why the lines are worth reading
A point spread or moneyline is not one person's opinion. It starts as an oddsmaker's number and then moves as money comes in from bettors on both sides. By game day, the line reflects injuries, travel, goalie announcements and everything else the market has priced in. Over a season, closing lines are very hard to beat consistently, which is exactly why they make a useful baseline for pool players.
Turning odds into win probabilities
Pools ask you who will win, so the most useful number is the moneyline. It converts to an implied probability with two simple formulas.
- Favourite (negative odds): odds / (odds + 100)
- Underdog (positive odds): 100 / (odds + 100)
Say the Maple Leafs are -150 at home and their opponent is +130.
- Leafs: 150 / 250 = 60.0%
- Opponent: 100 / 230 = 43.5%
Add those together and you get 103.5%, not 100%. The extra 3.5% is the bookmaker's margin, also called the vig or juice. It is built into every line, so the raw numbers overstate both teams' chances a little.
Removing the margin to find fair odds
To get a cleaner estimate, divide each implied probability by the total.
- Leafs: 60.0 / 103.5 = about 58.0%
- Opponent: 43.5 / 103.5 = about 42.0%
Those are the market's fair odds for the game. It is a small adjustment, but in a confidence pool where you rank every game, a couple of percentage points can decide whether a pick sits fourth or seventh on your sheet. Lines for the same game can vary slightly from book to book, so it is worth checking two sources before you lock in a confidence ranking. If one of them is an international crypto sportsbook, read an independent assessment first, such as this Rainbet review, which covers its sports markets, payouts and licensing.
Using spreads in NFL pools
NFL lines are usually quoted as point spreads. A team at -7 is expected to win by about a touchdown. For straight-up pools, the spread gives you a quick sense of confidence.
- Spreads of 1 to 3 points are close to a coin flip. A 3-point favourite wins more often than not, but not by much.
- Spreads of 7 or more suggest a clear favourite.
- Spreads of 10 or more are less common and usually reflect a big gap in quality or a key injury.
In against-the-spread pools, the line is part of the game. Here the market has already done the work of making both sides roughly even, so your edge comes from late news. A starting quarterback ruled out on Friday, or a weather forecast that changes on Saturday, may not be fully reflected in the number your pool locked in on Tuesday.
Using puck lines and moneylines in NHL pools
Hockey is harder to call than football. Scoring is low and a hot goalie can swing any game, so NHL moneylines are usually much tighter than NFL ones. A favourite that would be a near-lock in football is often closer to a two-in-three chance on the ice, and true locks are rare.
The NHL also has the puck line, which is almost always set at 1.5 goals. The favourite at -1.5 needs to win by two or more, which includes empty-net goals late in close games. For a pool that only asks who wins, ignore the puck line and use the moneyline.
Building a confidence pool sheet
If your pool asks you to rank picks by confidence, the method is simple.
- Convert every moneyline into a fair win probability.
- Sort the games from highest to lowest probability.
- Assign your highest confidence points to the top of the list.
That alone tends to beat ranking games on gut feel. Where two games are within a point or two of each other, use tiebreakers like late injury news or a back-to-back schedule.
When to go against the favourite
In a small pool, picking favourites every week is often enough. In a large pool, it usually is not, because hundreds of other entries will make the same picks and you finish in the middle of the pack.
The way to separate yourself is to choose a few spots to take an underdog when the market sees the game as close. A 45% underdog is a reasonable gamble. A 25% underdog is usually not. The lines tell you which is which, so your contrarian picks become calculated rather than random.
A weekly routine that takes ten minutes
- Pull the moneylines for every game on the slate.
- Convert them to fair probabilities.
- Note any game where the line has moved more than a point (NFL) or 20 cents (NHL) since the start of the week, and check why.
- Rank your picks and lock them in before the deadline.
A quick word on betting
This approach is about making better pool picks, not about betting. If you do bet on sports, make sure it is legal where you live, that you meet the legal age (18+ or older depending on your province or state), and that you only stake money you can afford to lose. Play responsibly, and keep the office pool fun.
