>2 - If the roll is greater than or equal to 2ģ - Roll 3 d6's and count one success for each roll of 3 or higherġ0d63f1 - Roll 3 d6's and count one success for each roll of 3 or higher and one failure for each 1ġ0d65 - Roll 10 d6's and count one success for each roll of 4 or less and one failure for each roll of 5 or moreĮxploding dice, also known as 'rule of 6' or 'rule of 10s' depending on your gaming system, rolls an additional die if the maximum is rolled. If the operation is not specified = is assumed and for most modifiers the entire Compare Point can be left off for the default behavior. A Compare Point consists of an optional compare operation and a target number. We'll call this a Compare Point or CP for short in the roll modifiers below. Many modifiers compare each die to a target number to decided if the modifier action should be applied. Rolls can have multiple modifiers applied to a single roll to allow for complex dice expressions.

Each modifier states which Types Of Dice it can be applied to in parentheses after the modifier name. Modfiers that can change the behavior or outcome of dice rolls. Dice computation can be used with both Basic and Fate dice. Computed Dice Roll (N+Y)dX/ Nd(X+Y)Ĭomputes the number of dice to roll or the number of sides on the dice based on the mathematical expression in the parentheses. These dice have three sides with values of -1, 0, and 1. N must be greater than or equal to 0 and X must be greater than or equal to 1. Rolls N traditional (almost, you can have any number of sides that you want) dice with X sides per die. Roll20 supports more than just your standard polyhedrons when rolling dice, below are the available die types you can use in your games. Finally, the entire remaining formula is evaluated, including observing proper math order of operations (parentheses first, then multiplication/division, then addition/subtraction). Next, floor() and ceil() functions are executed. '2d6' is rolled including any special dice such as dropped or exploding), then the result of that roll is substituted into the formula. The roll is executed: first, dice are rolled for any dice (e.g. This means that putting parentheses inside of your dice formula will not always affect the outcome of the roll (for example, you can't force a variable to be interpreted before a macro). While the Roll20 dice engine does support basic math and functions such as floor() and ceil(), it is first and foremost a dice engine, and so it has its own order of operations. Roll20 Dice Specification Order of Operations

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