2d6 roller
Two six-sided dice, shown separately and as a sum.
Roll to draw new faces. Nothing is chosen yet.
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Recent rolls
Rolls you make in this visit show up here.
Each tap is a new pseudorandom draw via crypto.getRandomValues. Not atmospheric noise. How the draw works
About this page
Two six-sided dice are not a uniform picker from 2 to 12. There are 36 ordered outcomes if you can tell the dice apart, which this page can, because it shows both faces. Only one pair sums to 2: 1 and 1. Six pairs sum to 7. A 7 is therefore six times as common as snake eyes. This preset opens at two dice with six faces. Roll, read each face, then read the total. If you only wanted one cube, switch to the d6 page. If you wanted every total from 2 to 12 to be equally likely, you do not want 2d6. You want the number tool, and you should know you have changed the game.
Related
Questions
Why is 7 the most common sum?
Because 1+6, 2+5, 3+4, 4+3, 5+2, and 6+1 all equal 7. That is 6 of 36 pairs, or 1 in 6. The pairs are equally likely. The sums are not. A board game that moves by 2d6 is using that bell shape on purpose. Flattening it would change how often you land on the middle squares.
What are the odds of snake eyes?
1 and 1 is one pair out of 36, about 2.8 percent. Boxcars, 6 and 6, is also 1 in 36. The page shows the two faces so you can confirm you really rolled a pair rather than a summed 2 that could have been mistyped.
What are the odds of 12?
Same as snake eyes: one pair, 6+6. A 12 is not 'due' after a dry spell. Each roll replaces the sample. Across 36 rolls you might see no 12, or more than one. Expect about one, and do not stake a story on the difference.
Does the page roll two dice or one number from 2 to 12?
Two dice. You see two boxes. The sum is arithmetic after the draws. A single draw from 2 to 12 would make snake eyes as common as a 7, which is the mistake this page exists to avoid. The number range 1–6 is a single die written as a numeral.
Can I roll three dice instead?
Change the count. Three d6s are 3d6, a different distribution again, famous in some character-generation rules because the totals clump harder. This URL starts at two because that is the common board-game pair. The heading will still say 2d6, so say the new count out loud if you edit it.
Is the shake a second roll?
No. Each roll is chosen when you press the button. Animation only reveals that draw. The browser uses crypto.getRandomValues and rejection sampling, which the methodology page spells out. This is not a loaded die, and it is not atmospheric noise. The two numbers that remain on screen are the two draws that make the sum.
What totals should I expect besides 7?
6 and 8 each have five pairs out of 36. 5 and 9 have four. 4 and 10 have three. 3 and 11 have two. 2 and 12 have one. You do not need to memorize the list to use the page. You need it if someone claims the totals are equally likely. Roll a few dozen times in class and the middle column should grow faster. A single turn can still be snake eyes. That is one of the thirty-six pairs, and it is allowed.