Calculators
Super Bowl and Grey Cup squares odds
Check how often each box hits by quarter in football score data (source shown with the map), add up the chance of your boxes and generate a random board to print or share.
Rows: last digit of one team’s score; columns: the other team. Numbers are % of 6,998 NFL games (2000–2025, regular season and playoffs). Which team is the row does not matter here: both orders are averaged.
Most common final digits: 0–7 (3.6%), 4–7 (3.3%), 0–3 (3.2%). Tap squares to add them to yours.
Before the digits are drawn every square is worth the same: total prizes ÷ 100 − the price of a square = $0.00.
Pool prizes and price of a square
Where the numbers come from
Each game’s score at the end of the first quarter, at halftime, at the end of the third quarter and at the final whistle (overtime included), reduced to last digits and counted. «Any of the four» counts games where the square came up at least once.
Expected value of a square = Σ prize × chance for each period − price. Past games describe how football is scored; they do not predict one game.
NFL scores data: nflverse (nflverse-data releases 'pbp' and 'schedules', https://github.com/nflverse/nflverse-data), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Changes: reduced to cumulative scores at end of Q1, halftime, end of Q3 and final.
How a squares pool works
- Draw the gridA board has 100 boxes. One team's digits go across the top, the other team's down the side.
- Sell the boxesPlayers buy boxes, for example at $10 each, and write their names in them before any digits are shown.
- Draw the digitsWhen all boxes are sold, the digits are drawn at random and written along both edges.
- Read the scoreAt the end of each quarter, take the last digit of each team's score. A 17–14 score points to the box at 7 and 4.
- Pay the prizeThe name in that box wins that quarter, for example $250 from a $1,000 pool. The organizer sets the prize split.
Chances before and after the draw
Before the digits
1%While the digits are hidden, every box has the same chance per quarter. No box is better or worse.
After the digits
Some digits end football scores more often than others. Boxes with more common digits get a higher chance – the heat map above shows which.
Your total chance
Add the chances of all your boxes for a quarter. The calculator above does this for Q1, Half, Q3 and Final.
Grey Cup boards
Use the same grid for the CFL final. The heat map comes from football score data – check its source, as it may not match Grey Cup scores.
Average value of one box
Average prize per box = pool ÷ boxes; value = average prize − cost of a box
Example: $1,000 ÷ 100 = $10.00. Minus the $10 cost leaves $0.00 when all money goes back as prizes.
Squares pool vs point spread bet
Squares pool
- You pick or buy boxes first; random digits then set each box's numbers
- Only the last digit of each score matters
- The winner of the game does not matter
- With no organizer cut, the whole pool goes back as prizes
Point spread bet
- You choose a side against a line
- The final margin decides the result
- See point spread explained
- The price includes a margin – a cost for you
Questions
What are the odds of winning Super Bowl squares?
Before the digits are drawn, each box has a 1% chance per quarter. After the draw, it depends on how common your two digits are – the heat map above shows it by quarter.
Which Super Bowl squares numbers come up most often?
Digits that often end football scores hit more. Check the heat map above for each quarter. On a fair board the digits are drawn at random, so you cannot choose them.
How do Grey Cup squares work?
They use the same grid as Super Bowl squares: the last digit of each team's score at the end of each quarter picks the winning box. The heat map may not match CFL scores. More: Grey Cup and CFL betting.
Is a squares pool like a 50/50 draw?
Both share a pool among players by chance. In a 50/50 draw one ticket is drawn from all sold; in squares the score picks a winning box each quarter.
Is there a Super Bowl squares generator here?
Yes. The generator above fills a board with randomly drawn digits. You can print it or share it by link.