Roll 4d20
Free online 4d20 dice roller and calculator. Roll 4 d20 instantly — see results, min 4, max 80, and average 42.
Quick roll
Dice notation
kh keep highest · kl keep lowest · dl drop lowest · Space roll
Presets
Roll lines
Roll log
Your roll history appears here.
Need to roll 4d20? Dice Cove’s roller is preloaded with 4d20 so you can roll once or many times, log every result, and check the math: minimum 4, maximum 80, expected average 42.
4d20 calculator stats
- Minimum: 4
- Maximum: 80
- Average: 42
Use this page as a quick 4d20 roller and average calculator — roll as many times as you need and compare totals to the 42 expected value. For keep/drop rules and custom formulas, open the dice calculator.
How to roll 4d20
- Press Roll — notation is already set to 4d20.
- Add a modifier (for example 4d20+5) when damage or a bonus applies.
- Check the roll log to compare several 4d20 results in a row.
- Switch dice anytime via the tray or the full dice roller.
Common 4d20 uses
- Quick 4d20 damage or table rolls at the table
- Multi-attack checks or mass d20 rolls
- Compare results to the 42 average for 4d20
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- Dice calculator — averages, odds, and custom notation
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Frequently asked questions
What is the average of 4d20?
The average of 4d20 is 42. Each d20 averages 10.5, so 4 × 10.5 = 42.
What is the minimum and maximum for 4d20?
4d20 ranges from 4 (all 1s) to 80 (all 20s).
How do I roll 4d20 with a modifier?
Type 4d20+3 (or use the modifier field) to add a bonus to the total — useful for damage riders and spell attack modifiers.