CritCalc is a free online dice roller and damage calculator for Dungeons & Dragons 5th edition. Roll any combination of d4, d6, d8, d10, d12, d20, and d100 dice, tag damage by type (slashing, piercing, bludgeoning, fire, cold, thunder, lightning, acid, poison, necrotic, radiant, or psychic), and instantly apply advantage, disadvantage, resistance, or vulnerability.