Advantage and Disadvantage in D&D 5e Explained

26 March 2026

Advantage and disadvantage are one of D&D 5e’s most elegant mechanics. Once you understand how they work, you’ll use them constantly — and you’ll start looking for ways to create them every single turn.

The rule itself

When you have advantage on a roll, you roll the d20 twice and use the higher result.

When you have disadvantage, you roll twice and use the lower result.

That’s the entire rule. Two dice, take the better or take the worse.

Why it matters more than you’d think

Rolling twice and taking the best is more powerful than a flat +5 bonus in most situations. Statistically:

• Advantage gives you roughly the equivalent of a +3 to +5 bonus depending on what you’re trying to roll.
• Disadvantage is the mirror equivalent of a −3 to −5 penalty.

But the real impact is at the extremes. With advantage:

• Your chance of rolling a natural 20 goes from 5% to nearly 10%.
• Your chance of rolling a 1 drops to just over 0.25%.

Disadvantage reverses this — rolling a natural 1 becomes far more likely, and landing a natural 20 is very difficult.

This means advantage matters most when it matters most: critical situations where a high roll or low roll changes everything.

The stacking rule (this surprises people)

Multiple sources of advantage don’t stack. If three things each give you advantage on a roll, you still only roll twice — you don’t roll three dice and pick the best.

The same applies to disadvantage.

However: if you have both advantage and disadvantage on the same roll — from any number of sources — they cancel out completely. You roll once, as normal. Even if you have two sources of advantage and one source of disadvantage, it cancels to a normal roll.

This is called the “neither advantage nor disadvantage” rule, and it means that stacking buffs to gain advantage is only valuable until it’s cancelled by a single source of disadvantage.

When do you get advantage?

Advantage comes from many places. Common examples:

• Unseen attacks: If your target can’t see you (you’re hidden, invisible, or attacking from darkness), your attacks have advantage.
• Prone targets: Melee attacks against a prone creature have advantage. (Ranged attacks have disadvantage.)
• Helping: If an ally uses the Help action, your next attack or ability check against the target has advantage.
• Flanking (optional rule): Some DMs use the optional flanking rule — if two creatures are on opposite sides of an enemy, both have advantage on attacks.
• Class features and spells: Rogue’s Steady Aim, Bard’s Faerie Fire, the Blur spell cancelling attacks, and dozens more.
• Inspiration: The DM can grant Inspiration to reward good roleplay; you spend it to gain advantage on one roll.

When do you have disadvantage?

Common sources of disadvantage:

• Attacking while blinded or in darkness: If you can’t see your target, attacks have disadvantage.
• Long-range attacks: If you’re shooting at a target beyond your weapon’s normal range (but within its maximum range), you have disadvantage.
• Prone attacker: If you’re prone and making a ranged attack, disadvantage.
• Heavy armour without proficiency: All rolls involving Strength and Dexterity have disadvantage if you wear armour you’re not proficient with.
• Frightened: A frightened creature has disadvantage on attack rolls and ability checks while the source of its fear is in sight.
• Certain spells and conditions: Being poisoned, exhausted, restrained, or affected by several spells imposes disadvantage on specific rolls.

Practical table tips

Look for free advantage before attacking. Can you hide before striking? Is an ally in position to Help? Is the target prone? Don’t throw away advantage opportunities.

Disadvantage on saving throws is devastating. Many spells force saving throws. If an enemy has disadvantage on their Wisdom save against your Charm Person, they’re very likely to fail. Effects that impose disadvantage on saves are often more valuable than they look.

Don’t let disadvantage surprise you mid-combat. Before you commit to a ranged attack, check if you’re within normal range. Before you attack, check if you have any conditions affecting your roll. A missed attack because you forgot about your disadvantage source wastes your action.

The Help action is underrated. Any character can use their action to Help, giving an ally advantage on one attack roll. If you’re not sure what to do on your turn, helping a party member who’s about to make a crucial attack is almost always a solid choice.

Passive checks and advantage

Passive checks (used mainly for Perception and Investigation) work slightly differently. Rather than rolling, you use:

10 + all normal modifiers

If you have advantage on the check, add 5. If you have disadvantage, subtract 5. So a character with Wisdom 14, proficiency in Perception (+2 proficiency bonus), and advantage would have a Passive Perception of 10 + 2 + 2 + 5 = 19. That’s high enough to notice most hidden threats without even rolling.

The elegant design behind it

The reason advantage and disadvantage work so well is that they’re simple and fast. Previous editions of D&D handled situational bonuses with a long list of specific numerical modifiers — flanking gives +2, attacking while prone gives −4, and so on. You had to remember dozens of numbers.

5e replaced almost all of that with two states: roll twice and take the best, or roll twice and take the worst. It’s faster to resolve, it’s easier to remember, and the math is good enough that it doesn’t create exploits. It’s one of the cleanest rules in the system.