Roll a D4
Roll a four-sided die online
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What Is a D4, and How Do I Roll One Online?
The D4 is a four-sided die shaped like a tetrahedron — a small pyramid with no flat top to land on, so a physical D4 is read off the vertex pointing up or the numbers printed along its bottom edges, rather than a face. It's the smallest of the standard polyhedral dice, but it carries real weight at the table: in Dungeons & Dragons it's the damage die for daggers, darts, and several low-level spells, and it turns up in card-and-dice games like Fluxx. Because a physical D4 is easy to lose (and uncomfortable to step on), a virtual one is handy to have around — tap to roll and read the result straight off the screen, no digging through a dice bag required.
Frequently Asked Questions
How do you read a D4 roll?
Unlike other dice, a D4 doesn't land on a flat top face. Read the number at the topmost vertex, or — on dice that print numbers along the bottom edge of each face — the number that appears upright on all three visible sides. RollAD20 skips the ambiguity entirely: the result is shown directly on screen.
What is a D4 used for in D&D?
It's the standard damage die for light weapons like daggers, darts, and slings, and it's rolled for a number of cantrips and minor magical effects — reflecting the smallest amount of damage a weapon or spell can deal.
What is the average roll on a D4?
2.5 — the midpoint between 1 and 4, calculated as (1 + 4) ÷ 2, the same way as any fair die.
Why is a physical D4 hard to roll fairly?
Its tetrahedral shape means it can't tumble the way a cube or icosahedron does — it has fewer faces to land on and can settle unevenly on soft or uneven surfaces. Rolling online sidesteps that: the result comes from cryptographically secure randomness, not physics.
Is this dice roller random and fair?
Every roll uses your browser's cryptographically secure random number generator (the Web Crypto API), so every face has an equal chance of coming up — the same fairness you'd expect from a physical die, no biased algorithm involved.