D&D 5e Spell Slot Calculator
Determine your total available spell slots for single or multiclass characters in Dungeons & Dragons 5th Edition.
Enter Character Levels
Full Casters
Half Casters
Rounds up for multiclassing.
Rounds down for multiclassing.
Rounds down for multiclassing.
Third Casters
Rounds down for multiclassing.
Rounds down for multiclassing.
Pact Magic
Pact Magic slots are separate.
Spellcasting Slots (Long Rest)
| 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th |
|---|---|---|---|---|---|---|---|---|
| Enter class levels to see results. | ||||||||
Spell Slot Distribution
What is a D&D 5e Spell Slot Calculator?
A dnd 5e spell slot calculator is an essential tool for players of Dungeons & Dragons 5th Edition, especially those with characters who have levels in more than one spellcasting class (a practice known as multiclassing). Spell slots are the resource a character expends to cast spells. While a single-class character’s spell slots are easy to track on their class table, a multiclass character combines their spellcasting power in a unique way. This calculator automates the complex calculation defined in the Player’s Handbook, saving you time and preventing errors at the gaming table.
This tool is for any player with a spellcasting character. It accurately determines your available spell slots by adding together levels from full casters (like Wizards and Clerics), half-casters (like Rangers and Paladins), and third-casters (like Eldritch Knights). It also correctly handles the unique rules for Artificers and the separate Pact Magic feature of Warlocks. A common misunderstanding is that you add spell slots from each class; instead, you calculate a combined “spellcaster level” to determine your final slot total from a special table.
D&D 5e Spell Slot Formula and Explanation
When you have levels in multiple classes with the Spellcasting feature, you must determine your available spell slots. The official formula involves calculating an “effective spellcaster level” and consulting the Multiclass Spellcaster table (PHB, p. 165). Our dnd 5e spell slot calculator does this for you automatically.
The core formula is:
Effective Spellcaster Level = (Sum of all Full Caster levels) + (Sum of Half Caster levels / 2) + (Sum of Third Caster levels / 3)
There are specific rounding rules: levels for Paladins, Rangers, Eldritch Knights, and Arcane Tricksters are rounded down. The Artificer is a unique half-caster whose levels are divided by two but rounded up. Warlock levels are not included in this calculation at all, as their Pact Magic is a separate feature.
Variables Table
| Variable Group | Meaning | Classes Included | Calculation Contribution |
|---|---|---|---|
| Full Caster | Classes that gain full spellcasting progression. | Bard, Cleric, Druid, Sorcerer, Wizard | Add full class level. |
| Half Caster | Classes that gain spellcasting progression at half the rate. | Artificer, Paladin, Ranger | Add half class level (Artificer rounds up, others round down). |
| Third Caster | Martial subclasses that gain limited spellcasting. | Fighter (Eldritch Knight), Rogue (Arcane Trickster) | Add one-third class level (rounded down). |
| Pact Magic | A unique spellcasting feature separate from the standard system. | Warlock | Not included in the combined calculation. Tracked separately. |
Once the effective level is found, the calculator references an internal table to provide the exact number of spell slots for each spell level from 1st to 9th.
Practical Examples
Example 1: The Nature-Bound Warrior
Let’s consider a character who is a Level 5 Ranger and a Level 3 Druid.
- Inputs: Ranger Level = 5, Druid Level = 3.
- Calculation: The Druid is a full caster, so we take all 3 levels. The Ranger is a half-caster, so we take half their level and round down (5 / 2 = 2.5, rounded down to 2). The total effective spellcaster level is 3 + 2 = 5.
- Results: A 5th-level spellcaster has four 1st-level slots, three 2nd-level slots, and two 3rd-level slots.
Example 2: The Arcane Knight
Imagine a powerful gish character: a Level 7 Wizard, Level 5 Eldritch Knight Fighter, and Level 2 Warlock.
- Inputs: Wizard Level = 7, Eldritch Knight Level = 5, Warlock Level = 2.
- Spellcasting Calculation: The Wizard is a full caster (7 levels). The Eldritch Knight is a third-caster (5 / 3 = 1.66, rounded down to 1). The total effective spellcaster level is 7 + 1 = 8.
- Pact Magic Calculation: The Warlock level is handled separately. A 2nd-level Warlock has their own Pact Magic slots.
- Results:
- Spellcasting: An 8th-level spellcaster has four 1st-level, three 2nd-level, three 3rd-level, and two 4th-level slots.
- Pact Magic: A 2nd-level Warlock has two 1st-level spell slots that refresh on a short rest.
How to Use This D&D 5e Spell Slot Calculator
Using this calculator is straightforward. Follow these simple steps to determine your character’s spellcasting power:
- Enter Your Levels: For each class your character has levels in, enter the number in the corresponding input field. If your character doesn’t have levels in a class, leave the field blank or at 0.
- Review the Results: The calculator will automatically update as you type. The “Spellcasting Slots” table shows your combined slots that refresh on a long rest.
- Check Pact Magic: If you entered a Warlock level, a separate “Pact Magic Slots” table will appear, showing your Warlock-specific slots that refresh on a short rest.
- Interpret the Chart: The bar chart provides a quick visual reference for how many slots you have at each spell level, helping you plan your resources.
- Reset or Copy: Use the “Reset” button to clear all fields. Use the “Copy Results” button to get a text summary of your slots for your character sheet or notes.
Key Factors That Affect Spell Slots
Several elements determine your final spell slot count. Understanding them is key to mastering your spellcaster.
- Class Choice: This is the primary factor. Full casters, half-casters, and third-casters contribute differently to your multiclass progression.
- Character Level: Your level in each specific class is the number used in the calculation. Simply adding total character level is incorrect.
- Multiclassing Rules: The core of the calculation. How the fractions of levels from half and third-casters are combined and rounded is critical.
- Warlock’s Pact Magic: Warlock slots are always separate. They don’t add to the multiclass calculation but can be used to cast spells from your other classes, and vice versa.
- Artificer Class: As the only half-caster that rounds its contribution *up*, multiclassing with an Artificer can sometimes push you into a higher spellcaster tier sooner than other half-casters.
- Feats and Magic Items: While most feats (like Magic Initiate) and items grant the ability to cast specific spells without using slots, they generally do not add to your total number of spell slots. Always check the specific wording of the item or feat.
Frequently Asked Questions
- 1. Do Warlock spell slots stack with other classes?
- No, Warlock Pact Magic slots do not stack or combine with the Spellcasting feature slots. Our dnd 5e spell slot calculator displays them in a separate table because they have their own progression and refresh on a short rest.
- 2. What happens if I have spell slots for a level of spell I don’t know?
- This is common for multiclass characters. You can use those higher-level slots to “upcast” your lower-level spells, often with enhanced effects as described in the spell’s text. You cannot use them to cast spells of a level you don’t have access to.
- 3. How are Artificer levels counted in multiclassing?
- An Artificer adds half of their class level, rounded up, to the effective spellcaster level calculation. This is a unique rule for this class.
- 4. How do I count levels for Eldritch Knight or Arcane Trickster?
- You add one-third of your Fighter (Eldritch Knight) or Rogue (Arcane Trickster) levels, rounded down, to your calculation.
- 5. What’s the difference between spells known and spell slots?
- Spell slots are the energy you have to cast spells. Spells known (or prepared) are the specific spells you have available to choose from when you expend a slot. This calculator determines your slots, not the spells you know.
- 6. Why are my spell slots different from just adding my classes’ slots together?
- D&D 5e uses a consolidated system for multiclassing to balance power. Instead of just adding slots, it creates a new “effective level” and gives you the slots for a caster of that level, which is a different progression.
- 7. Do I have to be a certain level to multiclass?
- Yes, to multiclass into or out of a class, you must meet the ability score prerequisites listed in the Player’s Handbook (Chapter 6). For example, to multiclass into Wizard, you need an Intelligence score of at least 13.
- 8. Where can I find the official multiclassing rules?
- The primary rules are in the Player’s Handbook, Chapter 6, under the “Multiclassing” section. Additional rules, like those for the Artificer, are found in the books where those classes were published (e.g., *Tasha’s Cauldron of Everything* or *Eberron: Rising from the Last War*).