Archives of Nethys

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Chapter 1: Overview / Getting Started / Some Basic Concepts

1d6, 1d20, etc.

Source Starfinder Core Rulebook pg. 8
These figures are abbreviations for die rolls and indicate which dice you roll to determine a variable number, such as the amount of damage a weapon deals. The first number tells you how many dice to roll, while the second number tells you the number of sides the die or dice must have; if there’s no first number, just roll one die. For example, “roll 2d8” means that you must roll two eight-sided dice, and “roll a d20” means you must roll one 20-sided die. Occasionally, you may need to roll a d3; if you don’t have a three-sided die, you can roll a d6 instead—treat a roll of 1 or 2 as a 1, a roll of 3 or 4 as a 2, and a roll of 5 or 6 as a 3.