From D&D Wiki
|This material is published under the OGL 1.0a.|
These rules use the following die notations:
- d4 = four sided die
- d6 = six sided die
- d8 = eight sided die
- d10 = ten sided die
- d12 = twelve sided die
- d20 = twenty sided die
- d% = percentile dice (a number between 1 and 100 is generated by rolling two different ten-sided dice. One (designated before rolling) is the tens digit. The other is the ones digit. Two 0s represent 100.)
Die rolls are expressed in the format:
- [#] die type [+/- modifiers]
Example: 3d6+2 means: "Roll 3 six sided dice. Add the result of the three dice together. Add 2."
In general, if you wind up with a fraction, round down, even if the fraction is one-half or larger.
Exception: Certain rolls, such as damage and hit points, have a minimum of 1.
Sometimes a special rule makes you multiply a number or a die roll. As long as you’re applying a single multiplier, multiply the number normally. When two or more multipliers apply, however, combine them into a single multiple, with each extra multiple adding 1 less than its value to the first multiple. Thus, a double (x2) and a double (x2) applied to the same number results in a triple (x3, because 2 + 1 = 3).
Basic Task Resolution System
These rules assume a standardized system for determining the success or failure of any given task. That system is:
- d20 + Modifiers vs. Target Number
The Modifiers and Target Number are determined by the type of task.
If the result of the d20 roll + the Modifiers equals or exceeds the Target Number, the test is successful. Any other result is a failure.
A "natural 20" on the die roll is not an automatic success. A "natural 1" on the die roll is not an automatic failure, unless the rules state otherwise.
Back to MSRD
This page is protected from editing because it is an integral part of D&D Wiki. Please discuss possible problems on the talk page.