Which D&D 5e classes are supported?

All ten official 5e spellcasting classes and subclasses are covered. Full casters (Bard, Cleric, Druid, Sorcerer, Wizard) use the standard 9-level table. Half-casters (Paladin, Ranger) gain their first slot at level 2 and top out at 5th-level slots. Third-casters (Arcane Trickster, Eldritch Knight) gain slots from level 3 and reach 4th-level slots by level 19. Warlock uses Pact Magic — a fixed number of equal-level slots that refresh on a short rest.

How does Warlock Pact Magic work differently?

Warlocks do not use the standard spell-slot table. They have a small number of slots that are all the same level (the Pact Magic slot level), and all slots recover on a short rest rather than a long rest. For example a level 5 Warlock has two 3rd-level Pact Magic slots; both return after any short rest. The tracker shows this and the Short rest button restores Warlock slots automatically.

What does the concentration marker do?

If you tick Concentration before casting, the log marks the spell with a C badge and the header shows the currently active concentration spell. You can drop concentration at any time with the Drop button, or it clears automatically on a short or long rest. Only one concentration spell can be active at a time in D&D 5e.

Can I recover a single slot without taking a full rest?

Yes. Click any hollow (used) circle in the slot grid to recover exactly one slot of that level. This models class features like Arcane Recovery (Wizard), Natural Recovery (Druid), or manually undoing an accidental tap.

How is the spell-slot maximum calculated?

The tracker uses the official Dungeons and Dragons 5th Edition tables from the Player's Handbook. Full casters have slots at all nine levels by level 17. Half-casters use roughly half the progression: their effective caster level is floor(class level / 2). Third-casters use floor(class level / 3). Warlock is a separate Pact Magic table entirely. The slot-level cap per row is the source-of-truth for each class.

Does upcast spells cost the higher slot?

Yes. When you select a higher-level slot than the spell''s base level, the tracker deducts exactly that higher slot. For example casting Cure Wounds at a 3rd-level slot spends one 3rd-level slot, not one 1st-level slot. The spell log records the slot level used.

Is my session data saved between visits?

No. This is a single-session tracker — it resets when you close or refresh the tab. All calculation and state happens in your browser with no data sent to a server, so nothing is stored or uploaded.

D&D Spell Slot Tracker

Keeping mental track of which spell slots are available mid-combat is one of the most error-prone parts of running a D&D 5e spellcaster. This tool gives you a live visual grid for every slot level, a log of what you cast and when, concentration monitoring, and one-click short/long rest recovery — all in your browser with no account needed.

How it works

D&D 5e uses four distinct slot-progression systems, each modelled exactly here.

Full casters (Bard, Cleric, Druid, Sorcerer, Wizard) follow the main PHB table. At class level 1 they have two 1st-level slots; by level 17 they have access to all nine spell levels, with the maximum 4/3/3/3/2/1/1/1/1 distribution. All slots recover on a long rest.

Half-casters (Paladin, Ranger) have an effective caster level of approximately floor(class level / 2). They receive no slots at level 1, gain 1st-level slots at level 2, and top out at 5th-level slots by level 17. All slots recover on a long rest.

Third-casters (Arcane Trickster Rogues, Eldritch Knight Fighters) progress even more slowly: no slots until class level 3, reaching 4th-level slots only at level 19 with the distribution 4/3/3/1. Long-rest recovery.

Warlock (Pact Magic) is fundamentally different. Warlocks have a small number of slots — 1 at level 1, rising to 4 by level 17 — that are all the same level (climbing from 1st to 5th as the Warlock levels). Every slot returns on a short rest, not a long rest, making the Warlock a very different resource-management puzzle. The tracker’s Short rest button restores all Pact Magic slots automatically.

Worked example

A level 7 Wizard has the slot distribution: 4 / 3 / 3 / 1 (1st through 4th level).

During a dungeon encounter they cast:

Shield (1st-level reaction) — 3 first-level slots remain.
Fireball upcast to 4th level — 0 fourth-level slots remain, 17 average damage becomes 24.
Misty Step (2nd-level bonus action) — 2 second-level slots remain.

The slot grid shows the current state, the log shows all three entries with timestamps, and the total reads 6 / 11. After the encounter they take a short rest (no benefit for a Wizard) and then a long rest — pressing Long rest restores everything to 4/3/3/1 and clears the log.

Formula note

The tracker applies the official PHB 2014 (and 2024 revised) spell-slot tables verbatim. No interpolation or rounding is applied — the exact table values are hardcoded. For multi-class characters the PHB multiclassing rules require combining the caster levels using the Multiclass Spellcaster table (full-caster levels count fully, half-caster levels count half, third-caster levels count a third, rounding down the total) — this single-class tracker does not cover multiclassing, but you can manually set the “effective caster level” by choosing a class and adjusting the level.