D&D Dice Calculator

This calculator helps you determine the chances you have of succeeding in a D20 Test in Dungeons & Dragons or other d20-based systems. It allows you to visualize how helpful/detrimental getting Advantage/Disadvantage on your roll.

This is especially useful if you’re in combat and know the AC you’re trying to hit or have the Lucky feat and are determining if you’d like to spend a Luck Point to gain Advantage or give your enemy Disadvantage.

It also takes into consideration additional dice, like if a Bard gives you Bardic Inspiration or if a enemy has cast Bane on you.