# Halfling Luck

**Halfling Luck** is a passive feature in Baldur's Gate 3 that grants all halflings to reroll a dice when it lands on a 1 for an Attack Roll, Ability Check, or Saving Throw.

## Description

When you roll a 1 for an Attack roll, Ability check, or Saving throw, you can reroll the dice and must use the new roll.

## How to learn

Races:

- Character level 1: Halfling

(Character level is the sum of all class levels for a multi-classed character.)

## Notes

- It is possible for the new roll to be another 1.
- As of patch 6, when rolling with advantage, the following rules apply:
- If one dice rolls a 1, it's re-rolled, and the higher of the two dice used.
- If both dice roll a 1, they are
**both**re-rolled, and the higher one used.

- The chance to hit displayed when hovering an attack on an enemy doesn't take into account Halfling Luck.
- Halfling Luck is particularly useful to avoid failures for ability checks and saving throws when the roll would only fail on a critical miss.
- On a normal roll that succeeds on a 2 or more, Halfling Luck would reduce the chance to fail from 1/20 to 1/400.
- On a roll with advantage that succeeds on a 2 or more, Halfling Luck would reduce the chance to fail from 1/400 to 1/160000, making it practically impossible to fail. With Karmic Dice active, it may be simply impossible to roll 4 critical failures in a row.
- Traders can get all their easy to steal item stolen without fear of missing a single roll.
- Be mindful that it can make your character which gives disadvantage on all ability checks, including further pickpocket attempts.

- Stealth checks can get pretty much guaranteed to succeed.
- Also useful to avoid Concentration getting interrupted too often by constitution save critical misses when taking low damage.

## Math[edit | edit source]

### Chances of succeeding a specific roll[edit | edit source]

See Advantage math section for comparison.

Target on 1d20 | Luck Normal Roll | Luck with Advantage | Luck with Disadvantage |
---|---|---|---|

1 | 100% | 100% | 100% |

2 | 99.75% | 99.9994% | 99.5% |

3 | 94.50% | 99.7% | 89.3% |

4 | 89.25% | 98.84% | 79.66% |

5 | 84% | 97.44% | 70.56% |

6 | 78.75% | 95.48% | 62.02% |

7 | 73.5% | 92.98% | 54.02% |

8 | 68.25% | 89.92% | 46.58% |

9 | 63% | 86.31% | 39.69% |

10 | 57.75% | 82.15% | 33.35% |

11 | 52.5% | 77.44% | 27.56% |

12 | 47.25% | 72.17% | 22.33% |

13 | 42% | 66.36% | 17.64% |

14 | 36.75% | 59.99% | 13.51% |

15 | 31.5% | 53.08% | 9.92% |

16 | 26.25% | 45.61% | 6.89% |

17 | 21% | 37.59% | 4.41% |

18 | 15.75% | 29.02% | 2.48% |

19 | 10.5% | 19.9% | 1.1% |

20 | 5.25% | 10.22% | 0.28% |

### Chance to hit comparisons[edit | edit source]

On a normal roll, Halfling Luck multiplies the chance to hit by :

- 1.05 whatever the target roll is
- This would be the most noticeable for a target roll of 2 which would add a flat 4.75% chance to hit or almost +1 on a d20.
- For a target roll of 20 it would add a flat 0.25% chance to hit, which would be a critical success.

On a roll with Advantage, Halfling Luck multiplies the chance to hit by :

- 1.003 for a target roll of 2 or a flat +0.25% chance to hit
- 1.01 for a target roll of 3 or a flat +0.70% chance to hit

...

- 1.03 for a target roll of 11 or a flat +2.44% chance to hit

...

- 1.05 for a target roll of 20 or a flat +0.47% chance to hit, which would be a critical success.

On a roll with Disadvantage, Halfling Luck multiplies the chance to hit by :

- 1.10 whatever the target roll is
- This would be the most noticeable for a target roll of 2 which would add a flat 9.25% chance to hit or almost +2 on a d20.
- For a target roll of 20 it would add a flat 0.03% chance to hit, which would be a critical success.

### Chance to fail comparisons[edit | edit source]

On a normal roll, Halfling Luck divides the chance to fail by :

- 20 for a target roll of 2
- 1.82 for a target roll of 3
- 1.40 for a target roll of 4

...

- 1.003 for a target roll of 20

On a roll with Advantage, Halfling Luck divides the chance to fail by :

- 400 for a target roll of 2
- 3.31 for a target roll of 3
- 1.95 for a target roll of 4

...

- 1.01 for a target roll of 20

On a roll with Disadvantage, Halfling Luck divides the chance to fail by :

- 19.52 for a target roll of 2
- 1.78 for a target roll of 3
- 1.36 for a target roll of 4

...

- 1.0003 for a target roll of 20

## External Links[edit | edit source]

- Advantage and Halfling luck calculation by Kalaeman