DiceKit

Roll 2 dice

Press Roll to throw two fair six-sided dice. DiceKit shows each die and the total, and keeps a history of recent rolls. With two dice, totals from 2 to 12 are not equally likely: 7 comes up most often (6 ways out of 36), while 2 and 12 have only one way each. The chart shows the full distribution, and you can set a target to see the chance of rolling at least that number.

Fair rolls from your browser's crypto random generator

History

    Saved you some time? Leave a tip, entirely optional.

    For other games, tap 3d6 or type any other dice.

    Dice notation

    You typeMeaning
    d20One 20-sided die
    3d6+2Three six-sided dice plus 2
    1d8+1d6-1Mixed dice and a modifier
    4d6dl1 or 4d6kh3Roll four d6, drop the lowest (keep the highest three)
    2d20kh1 / 2d20kl1Advantage / disadvantage
    d% or d100Percentile die, 1 to 100

    How the rolls and odds work

    DiceKit draws each die from your browser's cryptographic random number generator (crypto.getRandomValues), using rejection sampling so no face is favoured. Nothing is sent anywhere. The odds are exact: plain dice are combined one at a time (a convolution of their distributions), and keep or drop rules are calculated by counting every possible combination. Only very large keep or drop pools are estimated by simulation, and the result says so.

    Handy averages

    DiceAverageRange
    d63.51–6
    2d672–12
    3d610.53–18
    4d6 drop lowest12.243–18
    d2010.51–20
    d20 with advantage13.831–20
    d20 with disadvantage7.181–20
    8d6288–48

    Frequently asked questions

    What is the probability of rolling doubles?

    1 in 6 (6 of the 36 combinations).

    What is the chance of rolling an 8 with two dice?

    5 in 36, about 13.9%.

    What is the average roll of two dice?

    7.

    Is DiceKit free?

    Yes, with no sign-up or ads.

    Is my roll history saved?

    Yes, in this browser only, and you can clear it at any time.

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