Compare → Strike 1d8+5 @ AC15 +9 adv

1d8+5 @ AC15 +9 adv

Damage distribution for 1d8+5 @ AC15 +9 adv. Edit the expression or drag the HP slider — the URL updates as you go, so the page is always shareable. expression syntax →

Strike

Roll 2 twenty-sided dice and keep the higher result (this is advantage — granted by Faerie Fire, Reckless Attack, Pack Tactics, hidden attackers, and a handful of other sources). Add +9. Compared against AC 15: you hit if the kept d20 face plus the bonus totals 15 or more (so the d20 needs to land on at least 6). A natural 20 always crits, regardless of AC. On a hit, deal 1 8-sided die, plus 5. On a crit, double the damage dice (the 1d8+5 becomes 2d8+5); flat modifiers stay the same.

min 0 max 21 mean 9.34 1869/200 ±3.61
P(finish at 10 HP) = 50.84% (6507/12800)
  • 0 6.25%
  • 1 0.00%
  • 2 0.00%
  • 3 0.00%
  • 4 0.00%
  • 5 0.00%
  • 6 10.50%
  • 7 10.65%
  • 8 10.80%
  • 9 10.96%
  • 10 11.11%
  • 11 11.26%
  • 12 11.41%
  • 13 11.57%
  • 14 1.22%
  • 15 1.07%
  • 16 0.91%
  • 17 0.76%
  • 18 0.61%
  • 19 0.46%
  • 20 0.30%
  • 21 0.15%
Strikes to kill 10 HP expected: 1.55
  • ≤ 1 50.84%
  • ≤ 2 94.25%
  • ≤ 3 99.47%
  • ≤ 4 99.96%

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Why some expressions kill faster than others with the same mean is the kind of thing the concepts pillars work out — start with variance and kill probability if this strike's distribution looks surprising.