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1d20

Damage distribution for 1d20. 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 20-sided die.

min 1 max 20 mean 10.50 21/2 ±5.77
P(finish at 10 HP) = 55.00% (11/20)
  • 1 5.00%
  • 2 5.00%
  • 3 5.00%
  • 4 5.00%
  • 5 5.00%
  • 6 5.00%
  • 7 5.00%
  • 8 5.00%
  • 9 5.00%
  • 10 5.00%
  • 11 5.00%
  • 12 5.00%
  • 13 5.00%
  • 14 5.00%
  • 15 5.00%
  • 16 5.00%
  • 17 5.00%
  • 18 5.00%
  • 19 5.00%
  • 20 5.00%
Strikes to kill 10 HP expected: 1.55
  • ≤ 1 55.00%
  • ≤ 2 91.00%
  • ≤ 3 98.95%
  • ≤ 4 99.92%