Warrior
Level	Enemy AC	Hit Prob.	Missile Adj.	Weapon Bonus	Other	d20 Roll
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10	-5 -4 -3 -2 -1 Normal +1 +2 +3 +4 +5 +6 +7	-6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10
Priest
Level	Enemy AC	Hit Prob.	Missile Adj.	Weapon Bonus	Other	d20 Roll
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10	-5 -4 -3 -2 -1 Normal +1 +2 +3 +4 +5 +6 +7	-6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10
Rogue
Level	Enemy AC	Hit Prob.	Missile Adj.	Weapon Bonus	Other	d20 Roll
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10	-5 -4 -3 -2 -1 Normal +1 +2 +3 +4 +5 +6 +7	-6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10
Wizard
Level	Enemy AC	Hit Prob.	Missile Adj.	Weapon Bonus	Other	d20 Roll
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10	-5 -4 -3 -2 -1 Normal +1 +2 +3 +4 +5 +6 +7	-6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5	-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10

Calculate Clear

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Choose the stats above and press [Calculate] to tell you the number needed to be rolled on a d20 to hit an opponent. Other is for any modifiers not listed that may be present. Just add the modifiers and choose the result.