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DnD Dice Roller Calculator
Average damage and hit chances for common Dungeons and Dragons rolls.
star Free Online Tool
⚡ Instant Results
📊 Clear Comparison
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Chance to hit
Compare Your Options And Get Clear Answers
Average damage and hit chances for common Dungeons and Dragons rolls.
DnD Dice Roller Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Hit chance = (21 – (AC – bonus)) / 20.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
DnD Quick Guide
Typical values for reference.
| Dice | AC | Attack bonus | Hit % |
|---|---|---|---|
| 2 | 15 | 5 | 55% |
| 1 | 13 | 4 | 60% |
| 3 | 18 | 6 | 45% |
| 1 | 10 | 8 | 95% |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
DnD Dice Roller Calculator FAQ
Answers to common questions about this calculator.
You need AC minus attack bonus or higher on a d20.
Doubles the damage dice.
Roll two d20 and take the higher.
It follows 5th edition rules.