Roll 20 Dice

Odds when you roll 20 dice

Total of 20d6

The total ranges from 20 to 120, averages 70, and is most likely to be 70.

Totals with less than a 0.05% chance are left out of the table.

When you roll 20 dice at once

Huge dice pools: In success-counting games where a 5 or 6 is a hit, twenty dice average 6.67 hits. You reach at least 5 hits 84.85% of the time, at least 7 hits 52.07% of the time, and at least 10 hits 9.19% of the time. Rolling and counting that many physical dice is slow, which is where an online roller helps most.

Epic damage: The biggest spells in D&D roll handfuls of d6s. Meteor Swarm, a 9th-level spell, deals 20d6 fire damage plus 20d6 bludgeoning damage to each creature that fails its save. Roll 20 dice twice, or once and add the dice yourself. For smaller rolls such as 8d6 Fireball damage, use the expression rollers.

The law of large numbers: Twenty dice show why big rolls are predictable. A single die is just as likely to show 1 as 6, but the total of twenty lands within 10 of 70 most of the time, and the most likely total, 70, appears 5.18% of the time. It is a quick classroom demo of how averages settle down as you add more dice. Compare with roll 10 dice.

Roll 20 Dice FAQ

What is the average total of 20 dice?

The average total of twenty six-sided dice is 70, with a range of 20 to 120. A total from 60 to 80 happens 82.98% of the time.

What are the odds of no 6s on 20 dice?

The chance that none of twenty dice shows a 6 is 2.61%. At least one 6 appears 97.39% of the time.

How many hits do 20 dice get if 5s and 6s succeed?

Twenty dice average 6.67 hits when 5s and 6s count as successes. You get 7 or more hits 52.07% of the time.

Can I roll more than 20 dice?

Yes. Use the plus button to add more dice before you press Roll, and the roller shows each die and the total.

Related

• Roll 10 Dice
• Roll 8d6
• Dice Calculator

Other dice

• 3D Dice Roller
• Roll a d2
• Roll a d3
• Roll a d4
• Roll a d6
• Roll a d8
• Roll a d10
• Roll a d12
• Roll a d20
• Roll a d100
• Roll a d1000

About this roller

DnD Dice Roller (dnddiceroller.org) rolls every die with your browser's cryptographically secure random number generator, crypto.getRandomValues, and uses rejection sampling so every face is exactly equally likely. The 3D dice only animate a result that has already been decided this way; the physics never picks the number. Rolls happen on your device and are never sent to our server.

The site is built and maintained by Farooq Choudhary at Ozeito, which also publishes the DnD Dice Roller app for Android and iOS. Found a problem? Contact us.