One die, many dice
Strictly, one is a die and two or more are dice, so a single virtual die is still "roll a dice" to most people, and nobody at the table will correct you mid-fight. The roller above does both: choose a die, set how many, and the total comes out with every die shown so you can check the sum.
Which die do I need?
| If you are rolling | Use |
|---|---|
| An attack, a saving throw or a skill check | d20 |
| A coin flip, or a yes or no | d2 |
| One of three, or 1d3 damage | d3 |
| Damage from a dagger, or a Bless bonus | d4 |
| Damage from a shortsword, or a Fireball | d6 (Fireball is eight of them) |
| Damage from a longsword or rapier | d8 |
| Damage from a heavy crossbow or Fire Bolt | d10 |
| Damage from a greataxe | d12 |
| A wild magic surge or a treasure table | d100 |
| A table with a thousand entries | d1000 |
Are virtual dice fair?
Each face has the same chance, the same as on a well-made real one. The number comes from your browser's cryptographic random generator, and the roller throws away the few values that would tilt the result towards low numbers, so a d6 lands on each face one time in six. For a whole character's worth of dice in one go, the main roller keeps lists you can save.