Attributes

Attributes, also known as stats, are the numerical values of a character that affect their performance and the behavior of their tears, the game's primary weapon. All characters start with a different set of values and they can be increased or decreased during a run. The seven main stats are:
 * [[file:Health Stat Icon.png|30px]] Health: The amount of damage the character can take before dying.
 * [[file:Speed Stat Icon.png|30px]] Speed: How quickly the character moves.
 * [[file:Tears Stat Icon.png|40px]] Tears: The character's rate of fire. The lower the number, the faster tears are fired.
 * As of Repentance, Isaac's tear rate is shown in tears fired per second; the higher the number, the faster tears are fired.
 * [[file:Damage Stat Icon.png|30px]] Damage: The amount of damage that each of the character's tears deals to enemies.
 * [[file:Range Stat Icon.png|30px]] Range: How long the character's tears will travel before landing.
 * [[file:Shot Speed Stat Icon.png|30px]] Shot speed: How quickly the character's tears travel.
 * [[file:Luck Stat Icon.png|30px]] Luck: Affects a variety of chance-based effects.

Additionally, there are a few Hidden Attributes.

Stat Screen
Most attributes can be viewed on the pause menu, except for health (which is shown in the game HUD) and shot height (which is a hidden attribute). The pause menu's attributes are shown on an imprecise scale from 1 to 7, and the values are as follows:

The pause menu stat screen is made almost completely irrelevant by the introduction of the "Found Hud" feature in the Afterbirth+ DLC. Once it is enabled from the in-game options, the player's stats will be displayed in numerical form below the key count.

Found HUD
Some stats on the Found HUD are calculated and displayed differently from the internal, technical side of stats.

Speed: Simply displays a movement speed multiplier based on the default movement speed (1.00)

No conversion necessary, internal stats are the same as displayed stats.

Damage: Simply displays base damage per tear, without considering any special tear effects.

No conversion necessary, internal stats are the same as displayed stats.

Tears: Displayed as "Tears per second".

To convert the internal tear delay to "Tears per second", use this formula:

Update to Repentance

Range: Displayed as approximate "tear lifespan" per tear.

To convert the internal range to "tear lifespan", use this formula:

(Insert here)

Shot speed: What units it uses are unknown.

No conversion necessary, internal stats are the same as displayed stats.

Luck: Simply displays current luck.

No conversion necessary, internal stats are the same as displayed stats.