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Compare → Strike 1d8+15 @ AC17 +4

1d8+15 @ AC17 +4

Damage distribution for 1d8+15 @ AC17 +4. Edit the expression or drag the HP slider — the URL updates as you go, so the page is always shareable. expression syntax →

Strike

Roll 1 twenty-sided die. Add +4. Compared against AC 17: you hit if the kept d20 face plus the bonus totals 17 or more (so the d20 needs to land on at least 13). A natural 20 always crits, regardless of AC. On a hit, deal 1 8-sided die, plus 15. On a crit, double the damage dice (the 1d8+15 becomes 2d8+15); flat modifiers stay the same.

min 0 max 31 mean 8.03 321/40 ±9.99
P(finish at 15 HP) = 40.00% (2/5)
  • 0 60.00%
  • 1 0.00%
  • 2 0.00%
  • 3 0.00%
  • 4 0.00%
  • 5 0.00%
  • 6 0.00%
  • 7 0.00%
  • 8 0.00%
  • 9 0.00%
  • 10 0.00%
  • 11 0.00%
  • 12 0.00%
  • 13 0.00%
  • 14 0.00%
  • 15 0.00%
  • 16 4.38%
  • 17 4.45%
  • 18 4.53%
  • 19 4.61%
  • 20 4.69%
  • 21 4.77%
  • 22 4.84%
  • 23 4.92%
  • 24 0.63%
  • 25 0.55%
  • 26 0.47%
  • 27 0.39%
  • 28 0.31%
  • 29 0.23%
  • 30 0.16%
  • 31 0.08%
Strikes to kill 15 HP expected: 2.50
  • ≤ 1 40.00%
  • ≤ 2 64.00%
  • ≤ 3 78.40%
  • ≤ 4 87.04%
  • ≤ 5 92.22%
  • ≤ 6 95.33%
  • ≤ 7 97.20%
  • ≤ 8 98.32%
  • ≤ 9 98.99%
  • ≤ 10 99.40%
  • ≤ 11 99.64%

Truncated at 50 strikes — expected is a lower bound.