
In the fifth edition of Dungeons and Dragons, a player's Constitution modifier contributes to their hit points. When a player levels up, their maximum HP increases by 1d10 (or 6) + your Constitution modifier per fighter level. If a player increases their Constitution modifier, their HP maximum will also increase as though they had the new modifier from the first level.
| Characteristics | Values |
|---|---|
| Does increasing your constitution increase your HP per level? | Yes |
| How many HP does your character gain? | The number of HP gained is equal to your level |
| When do you gain HP from increasing your constitution? | When your constitution modifier increases by 1 |
| How do you calculate your new HP? | Recalculate your HP from level 1 with the new constitution modifier |
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What You'll Learn

Constitution modifier contributes to hit points
In 5th Edition (5e) Dungeons and Dragons, a character's Constitution modifier contributes to their hit points. When a player creates a character, they roll dice to generate ability scores, including Constitution. The Constitution modifier is then calculated by subtracting 10 from the ability score and dividing the remaining number by 2, rounding down. For example, a Constitution score of 12 becomes a modifier of +1. This modifier is then added to each Hit Die roll for the character's hit points.
The Constitution modifier affects the character's maximum hit points. If a character's Constitution modifier increases, their maximum hit points will also increase as if they had that modifier from the first level. For example, if a character increases their Constitution modifier from +1 to +2 at the fourth level, their maximum hit points will increase as if they had a +2 modifier from the first level. This means they would add 3 hit points for their first three levels and then roll their hit points for the fourth level using the new modifier.
Similarly, if a character's Constitution modifier decreases, their maximum hit points will also decrease. For example, if a character's Constitution modifier reduces from +2 to +1 at the seventh level, their maximum hit points will decrease by 7. It is important to note that changes in Constitution modifier only affect maximum hit points and not current hit points.
The impact of Constitution on hit points can be seen when levelling up. When a character levels up, their maximum hit points increase by the number rolled on their Hit Die, plus their Constitution modifier. For example, a Fighter with a Constitution modifier of +2 would increase their maximum hit points by 8 (1d10 or 6 + Constitution modifier of 2) when levelling up.
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Hit point maximum changes
When your character levels up, their hit point maximum (HP) increases. The amount of this increase is determined by your character's Constitution modifier. Typically, you add your Constitution modifier to each Hit Die you roll for your hit points. For example, if you are a level 6 fighter with a Constitution modifier of +2, your HP would increase by 1d10 (or 6) +2 per fighter level. This means that if you level up from 5 to 6 and your HP increases by 8, your new maximum HP is 47.
If your Constitution modifier increases, your HP reflects this change as if you had the new modifier from the first level. For example, if you are a level 4 character and increase your Constitution modifier from +1 to +2, you adjust your hit point maximum as though the modifier had always been +2. So, you add 3 hit points for your first three levels and then roll your hit points for the fourth level using your new modifier. This is sometimes referred to as the ASI, or Ability Score Improvement.
Some players prefer to recalculate their HP when their Constitution modifier increases by adding their new modifier to their current level. This can be a simpler way to keep track of HP changes. However, it is important to note that this is not the official rule and may not be allowed by all DMs.
Additionally, it is worth noting that some players choose to roll for their HP, adding an element of chance to their character's health. Others prefer to use a standard array or point buy system to determine their hit points, ensuring that all players start with the same amount of health. Ultimately, it is up to the DM and players to decide how they want to handle hit point maximum changes in their game.
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Constitution score and Constitution modifier
In 5th Edition (5e) Dungeons & Dragons, a character's Constitution score and Constitution modifier play a crucial role in determining their overall health, stamina, and vital force.
Constitution Score
The Constitution score represents a character's health, stamina, and vital force. It is one of the six ability scores in 5e, along with Strength, Dexterity, Intelligence, Wisdom, and Charisma. A character's Constitution score directly contributes to their maximum hit points (HP). The higher the Constitution score, the greater the character's HP will be.
When creating a character, the Constitution score is determined by rolling a die, choosing a standard set of ability scores, or using a point-buy system. This initial score sets the foundation for the character's health and can impact their survival and endurance in various challenges and encounters.
Constitution Modifier
The Constitution modifier is derived from the Constitution score and influences the character's HP in a more nuanced way. It is calculated by referring to a table that corresponds to the Constitution score. For example, a Constitution score of 12-13 results in a modifier of +1, while a score of 14-15 gives a modifier of +2.
The Constitution modifier is added to each Hit Die rolled for determining HP. When a character levels up, their Constitution modifier may increase, leading to a retroactive increase in HP for each level they have attained. This means that if a character's Constitution modifier increases by 1, their HP maximum increases by 1 for every level they have reached.
For example, if a fighter increases their Constitution score from 17 (+3 modifier) to 18 (+4 modifier) at 8th level, their HP maximum increases by 8. It is calculated as 8 levels x +1 modifier, resulting in an additional 8 HP.
In summary, the Constitution score sets the baseline for a character's health, while the Constitution modifier refines and enhances their HP maximum. Both aspects are essential for creating resilient characters capable of enduring the challenges they face during their adventures.
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Leveling up
When levelling up in 5e, your Constitution modifier contributes to your hit points. Typically, you add your Constitution modifier to each Hit Die you roll for your hit points. If your Constitution modifier changes, your hit point maximum changes as well. This is calculated as if you had the new modifier from the first level.
For example, if you increase your Constitution score when you reach the fourth level, and your Constitution modifier increases from +1 to +2, you adjust your hit point maximum as though the modifier had always been +2. So, you add three hit points for your first three levels, and then roll your hit points for the fourth level using your new modifier.
Alternatively, you can first raise your hit points as though your Constitution hadn't increased, then add your level to your hit point maximum. After that, increase the hit points using the new modifier for subsequent levels. This method gives the same result but requires fewer mathematical steps.
If you are unsure about the math, you can use an online 5e HP calculator to check your work.
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Hit Die
In the context of Dungeons & Dragons 5th edition (5e), Hit Dice are a key mechanic that govern a character's overall health and impact their ability to survive combat, exploration, and encounters. Each of the 13 official DnD 5e classes has a specific type of Hit Die, which determines the number of hit points (HP) a character gains when they level up or rest.
When creating a character, players first determine their starting hit points by rolling their class's specified Hit Die and adding their Constitution modifier to the result. For example, a Fighter class character with a Constitution modifier of +2 would roll 1d10 and add 2, resulting in starting hit points of 12. At level 1, a character has 1 Hit Die, and this number increases by 1 for each additional level gained, up to a maximum of 20 Hit Dice at level 20.
During a short rest, players can use one or more of their available Hit Dice to regain hit points. They roll one Hit Die at a time and can choose to spend another one after resolving each roll, up to the maximum number of Hit Dice their character has. For example, a 5th-level character can use up to 5 Hit Dice during a short rest. After a long rest, a character regains all lost hit points and recovers Hit Dice up to half of their total number of Hit Dice.
Additionally, certain class abilities, feats, spells, and magic items can affect the use of Hit Dice. For instance, the Dwarven Fortitude feat allows Dwarves to spend one Hit Die and use the Dodge action to heal themselves during combat.
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Frequently asked questions
Yes, your Constitution modifier contributes to your HP. When your Constitution modifier increases by 1, your HP maximum increases by 1 for each level you have attained.
You can recalculate your HP from level 1 with the new Constitution modifier, or you can add your levels' worth of hit points with the new modifier.
No, your HP maximum increases by 1 for each level you have attained. For example, if you increase your Constitution modifier from +3 to +4 at level 8, your HP maximum will increase by 8.
Yes, your HP maximum is calculated as though you had the new modifier from level 1. For example, if you increase your Constitution modifier from +1 to +2 at level 4, you add 3 hit points for your first three levels, and then roll your hit points for the fourth level using your new modifier.





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