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Advantage: Difference between revisions
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(Sorry, that maths is wrong. The probabilities can vary wildly.) |
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=== Chances of succeeding a specific roll=== | === Chances of succeeding a specific roll=== | ||
The benefits of rolling with advantage (or the detriments of rolling with disadvantage) change depending on the target number you need on the 1d20 roll to succeed. The bonus from advantage can be as large as 24-25% when needing a 9, 10, 11, 12, or 13 on the 1d20 roll, and as small as 9% if one needs to roll a 19. | The benefits of rolling with advantage (or the detriments of rolling with disadvantage) change depending on the target number you need on the 1d20 roll to succeed. The bonus from advantage can be as large as 24-25% when needing a 9, 10, 11, 12, or 13 on the 1d20 roll, and as small as 9% if one needs to roll a 19. | ||
After addition and subtraction include advanatage, If DC is more than 13, consider (dis)advantage 5 or a very high probability ({{math|x}} > 90%) that does not need to be calculated. | |||
( Dice 11 is 50% and 1 of each is 5% ) | |||
{| class="wikitable mw-collapsible <!--mw-collapsed-->" | {| class="wikitable mw-collapsible <!--mw-collapsed-->" | ||
|+Chance of rolling a target number or above on 1d20 | |+Chance of rolling a target number or above on 1d20 | ||
|- | |- | ||
!Target on 1d20!!Normal Roll!! Roll With Advantage!!Roll With Disadvantage | !Target on 1d20!!Normal Roll!! Roll With Advantage!!Roll With Disadvantage!!Gap between Normal and (Dis)advantage | ||
|- | |- | ||
|1|| 100% || 100%||100% | |1|| 100% || 100%||100%||0% | ||
|- | |- | ||
|2||95%|| 99.75%||90.25% | |2||95%|| 99.75%||90.25%||4.75% | ||
|- | |- | ||
|3||90% ||99%||81% | |3||90% ||99%||81%||9% | ||
|- | |- | ||
|4 ||85%|| 97.75% ||72.25% | |4 ||85%|| 97.75% ||72.25%||12.75% | ||
|- | |- | ||
| 5||80%|| 96%||64% | | 5||80%|| 96%||64%||16% | ||
|- | |- | ||
|6||75% || 93.75%|| 56.25% | |6||75% || 93.75%|| 56.25%||18.75% | ||
|- | |- | ||
|7 | |7 | ||
| 70%||91%||49% | | 70%||91%||49%||21% | ||
|- | |- | ||
|8||65% ||87.75%||42.25% | |8||65% ||87.75%||42.25%||22.75% | ||
|- | |- | ||
|9||60% ||84%||36% | |9||60% ||84%||36%||24% | ||
|- | |- | ||
|10||55%||79.75%||30.25% | |10||55%||79.75%||30.25%||24.75% | ||
|- | |- | ||
|11||50%||75%||25% | |11||50%||75%||25%||25% | ||
|- | |- | ||
|12 ||45%|| 69.75%||20.25% | |12 ||45%|| 69.75%||20.25%||24.75% | ||
|- | |- | ||
|13||40%||64%||16% | |13||40%||64%||16%||24% | ||
|- | |- | ||
|14||35%|| 57.75% || 12.25% | |14||35%|| 57.75% || 12.25%||22.75% | ||
|- | |- | ||
|15||30% ||51%||9% | |15||30% ||51%||9%||21% | ||
|- | |- | ||
|16||25% ||43.75%||6.25% | |16||25% ||43.75%||6.25%||18.75% | ||
|- | |- | ||
|17||20% ||36%||4% | |17||20% ||36%||4%||16% | ||
|- | |- | ||
|18||15% ||27.75%||2.25% | |18||15% ||27.75%||2.25%||12.75% | ||
|- | |- | ||
|19||10% ||19%||1% | |19||10% ||19%||1%||9% | ||
|- | |- | ||
|20||5%|| 9.75%||0.25% | |20||5%|| 9.75%||0.25%||4.75% | ||
|} | |} | ||