d10

The ten-sided die, or d10, is a polyhedral die used in many tabletop games and probability exercises. It has ten faces arranged as a pentagonal trapezohedron, yielding a uniform distribution of outcomes when rolled. Typically the faces are labeled with digits, commonly 0 through 9. In many games the 0 face represents 10, while some dice are labeled 1–10.

Used in single-roll checks and in dice pools, the d10 provides outcomes from 1 to 10. In percentile systems, two d10s are used: one die indicates tens (00, 10, 20, ..., 90) and the other indicates units (0–9). The sum or the paired digits yield a result from 00 to 99 for precision tasks or ranges.

Role-playing games commonly employ d10s for skill checks, damage, or attribute rolls in systems that use ten-sided dice. Some games require only a single d10 for a result 1–10, while others roll multiple d10s and add or compare to a target. The d10's shape is distinct among standard dice; its faces are not arranged as a simple polygon but as a trapezohedron, which influences how it lands.

Production and variations: Available in translucent or opaque plastics, metal, and glow-in-the-dark options; sold as part of standard dice sets alongside d4, d6, d8, d12, and d20. Numbering schemes vary, and some special editions label faces with 1–10 instead of 0–9. The d10 remains a staple in many gaming communities due to its simple, evenly distributed outcomes and its use in percentile mechanics.