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Gloomhaven Jaws Calculator

Gloomhaven Jaws Calculator

Set up a Jaws of the Lion scenario by party level, difficulty, monster level, trap damage, gold conversion, bonus XP, battle goal checkmarks, perk progress, and campaign shop notes.

This calculator follows the common Jaws setup loop: average character level, divide by two and round up for normal difficulty, then apply the selected difficulty step from easy through very hard.
1 Named Jaws Presets
2 Jaws Scenario Inputs

Adds a small readiness note and expected party pressure without changing the official level formula.

Jaws scenarios usually scale monster standees by two, three, or four characters.

Add the current level of every active character before opening the scenario book setup.

Scenario level is clamped from 0 to 7 after the difficulty modifier is applied.

Multiplies coins by the scenario level gold conversion value.

Add card XP and listed scenario reward XP before the completion bonus is applied.

Counts one checkmark per completed battle goal card for the active session.

Three checkmarks make one perk; leftover marks carry into the next scenario.

Scenario Level 0 monster level match
Trap Damage 0 damage per trap
Gold Collected 0 gold total
Perk Progress 0 new perks
Scenario Breakdown
3 Jaws Spec Grid
ceil(avg/2)
Normal level

Average character level is divided by two, then rounded up.

0 to 7
Scenario band

Difficulty adjustments are clamped to the campaign level table.

3 marks
Perk threshold

Every three battle goal checkmarks converts into one perk.

No track
Prosperity note

Jaws uses scenario and shop unlocks instead of prosperity levels.

4 Scenario Level Reward Table
Scenario levelMonster levelTrap damageGold per coinCompletion XP
002 damage2 gold4 XP
113 damage2 gold6 XP
224 damage3 gold8 XP
335 damage3 gold10 XP
446 damage4 gold12 XP
557 damage4 gold14 XP
668 damage5 gold16 XP
779 damage6 gold18 XP
5 Party Profile Table
Jaws party profileSetup pressureSuggested checkCalculator note
Hatchet and Red Guard front lineLow control, high focus damageWatch elite shield valuesGood two-character baseline for early scenarios.
Voidwarden and Demolitionist controlPositioning-heavy damage spikesTrack trap and obstacle roomsUseful when traps are part of the plan.
Hatchet, Red Guard, Demo, VoidwardenFull box party coverageConfirm four-player monster rowsBest for reading crowded setup maps.
Boss scenario burst partyHigh target priority pressureConfirm boss special rules firstPairs level and reward math with boss pacing.
Late campaign item-rich partyHigher stamina and damage floorCheck item shop unlocksUse when gear makes normal feel too soft.
6 Checkmark and Perk Table
Checkmarks after scenarioNew perks earnedCarryover marksCampaign sheet action
0 to 20 perks0 to 2 marksKeep marks on the current character sheet.
3 to 51 perk0 to 2 marksChoose one perk, then carry any extra checks.
6 to 82 perks0 to 2 marksUseful for catch-up characters with saved marks.
9 to 113 perks0 to 2 marksAudit carefully before changing modifier decks.
12 or more4+ perks0 to 2 marksCommon only when recording a backlog of sessions.
7 Prosperity and Shop Notes Table
Campaign item noteWhat to recordWhy it mattersCalculator treatment
No prosperity levelDo not add Gloomhaven prosperityJaws uses its own campaign flowShows a note, not a prosperity score.
Scenario unlocksMark new locations and rewardsUnlocks can change available choicesIncluded in the setup reminder line.
Item shop additionsRecord newly opened item rangesGear can justify harder scenariosReflected through party profile notes.
City event outcomesRecord rewards and penaltiesMay add gold, XP, or conditionsAdd event XP or coins into inputs manually.
8 Practical Tips

Calculate the level before opening monster stats.

Average the active character levels, round the normal scenario level, then apply the difficulty step so monster level, traps, gold, and bonus XP all come from one row.

Treat Jaws prosperity as a campaign note.

Jaws of the Lion does not use the full Gloomhaven prosperity track, so record scenario unlocks, item shop additions, and event rewards separately from level math.

Picking up Jaws of the Lion puts you in a room that has a certain vibe. It feels like playing Gloomhaven’s rules but different than your old habits will get in the way. The results of getting it wrong are large, so there is a mental adjustment needed when setting up a scenario. Permanent campaign progress management mean that a poor set-up can mess up the pace before you draw your first card.

The scenarios is scaled to difficulty differently from the original game. The prosperity level isn’t something you rely on. Jaws instead use an average-based formula. Add up the levels of every active mercenary in the party and divide by two. For standard play, round this number up. This will be used to calculate gold multipliers and trap damage. It will also determine monster stats and bonus experience points.

Simple Ways to Set Up Your Game

It is a clean system without any safety nets. That’s all the math the calculator does for you. You won’t have to dig around on reference pages when standing them up. You can choose your party profile whether it’s a four character squad or an ambush two person pair. And it estimates the readiness and pressure of your build without changing official level rules.

Having average level three is one thing when you’re rocking a solo Hatchet and another when you’re playing with a Voidwarden in a balanced team. The number isn’t as important as understanding what they mean. Scenario level directly influences trap damage. The harder the scenario step, the greater threat environment becomes, a genuine threat instead of a mere nuisance. Gold conversion shifts, changing how fast you can buy new gear. It’s nice that the tool lays out these values in an easy-to-understand way without making you remember individual tables.

Another place where players get lost is the battle goal checkmarks. For each goal that’s done, this adds to the number of perk choices that can be unlocked. Three checkmarks equals one full perk choice. This might seem like no big deal, but getting behind means having underpowered character in future scenarios. The calculator will display all the checkmarks you have so far and then it will tell you how many additional perks you’ll unlock. You can use this information to plan what abilities to focus on next.

There is no more prosperity track. Additions to shops and scenario unlocks are based off campaign flow, and do not contribute to difficulty formula. Record those separately from your level math. Use this table as a reference to help you stay organized when taking notes. That way, you don’t mix up permanent upgrades with temporary rewards.

Groups can push things too far, too fast; they make mistakes. They want to get as much experience as possible. But without items, these fights become boring and drain morale and stamina. There’s a casual mode because of that. Players who are new, or those who have taken time off, can come back and gradually work their way back into tactical combat without feeling pressured to perform perfectly.

Jaws You read the room when setting it up. Decide on levels and gear for each of your characters. Do I want this to be an easy win? Or do I have my work cut out for me? Your gut makes the call, but the numbers provide a starting point. Nail down the setup and arithmetic mistakes won’t spoil the fun.

Your goal… Whether it is to finish quickly or to engage deeply with tactics; will make the difference. Long term, each checkmark contributes to your characters’ development. Don’t ignore these perk thresholds. You will look back and could of kicked yourself midway through a play session.

Fortunately these tools perform boring math. It leaves your head free to think about ability combos and positions. Those are the core of the game.

Gloomhaven Jaws Calculator

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