PF2e Encounter Builder
Add creatures, watch the budget fill, and stop doing arithmetic on a notepad five minutes before the session. This Pathfinder 2e encounter calculator tracks XP against the official budget and rates the fight from Trivial to Extreme as you build it. A party of four gets 80 XP for a Moderate fight and 120 XP for a Severe one. Adding traps? The hazard calculator folds them into the same budget.
Encounter Difficulty
TrivialTotal XP
0XP
Party Configuration
Quick Templates
Creatures (0)
No creatures added yet.
Use the form above or pick a Quick Template.
XP Thresholds - Party of 4
| Difficulty | Budget |
|---|---|
| Trivial | 40 |
| Low | 60 |
| Moderate | 80 |
| Severe | 120 |
| Extreme | 160 |
Creature XP - Party Level 5
| Diff | Level | XP |
|---|---|---|
| -4 | 1 | 10 |
| -3 | 2 | 15 |
| -2 | 3 | 20 |
| -1 | 4 | 30 |
| +0 | 5 | 40 |
| +1 | 6 | 60 |
| +2 | 7 | 80 |
| +3 | 8 | 120 |
| +4 | 9 | 160 |
Pathfinder 2e Encounter Building Rules
Encounter building in PF2e is a spending problem, not a guessing game. Pick a difficulty, take its XP budget, and buy creatures with it. Set your party level and party size, then add creatures by how far above or below the party they sit. A same-level creature costs 40 XP; one four levels above costs 160 XP and swallows an entire Extreme budget by itself.
That relative-level pricing is the whole system, and it is short enough to memorise: -4 is 10 XP, -3 is 15, -2 is 20, -1 is 30, party level is 40, +1 is 60, +2 is 80, +3 is 120, and +4 is 160. Creatures five or more levels below the party are worth zero and are ignored entirely, which is why a pile of goblins stops threatening a 9th-level party no matter how many you add.
Encounter difficulty is determined by total XP against the budget thresholds for your party size. A Moderate encounter (80 XP for 4 players) is the baseline for a fair fight. Severe encounters (120 XP) should drain significant resources, while Extreme encounters (160 XP) risk character death. Trivial encounters (40 XP or less) rarely require meaningful resource expenditure.
Parties larger or smaller than four shift the budget for each missing or extra character: 10 XP at Trivial, 20 at Low, 20 at Moderate, 30 at Severe, and 40 at Extreme. Six players facing a Severe fight get 180 XP, not 120, and skipping that adjustment is the most common reason a planned encounter lands soft. The builder applies it for you. Use Quick Templates for a starting shape, or add creatures one at a time.
Starfinder 2e shares these XP budgets and creature values, so this builder works for SF2e encounters without any changes.
Encounter Building Questions GMs Ask Most
How do you build a balanced encounter in Pathfinder 2e?
Start from the XP budget for the difficulty you want, then spend it on creatures. For a party of four the budgets are Trivial 40, Low 60, Moderate 80, Severe 120, and Extreme 160 XP. A creature at party level costs 40 XP, one level higher costs 60, two higher costs 80, and four higher costs 160. Spend the budget however you like: four party-level creatures and one boss four levels up both come to 160 XP.
What is the XP budget for a party of 5 or 6 players?
Adjust the budget by a fixed amount for each character above or below four. Add 10 XP per extra player at Trivial, 20 at Low, 20 at Moderate, 30 at Severe, and 40 at Extreme. A Severe encounter for six players is 120 + 30 + 30 = 180 XP. Subtract the same amounts for a party of three.
How much XP is a creature worth in PF2e?
XP depends only on the creature's level relative to the party: four levels below is 10 XP, three below 15, two below 20, one below 30, equal level 40, one above 60, two above 80, three above 120, and four above 160. A creature five or more levels below the party is worth no XP and does not count toward the budget.
What difficulty should most encounters be?
Moderate. It is the baseline fair fight: the party should win while spending real resources. Save Severe for chapter climaxes and named villains, and treat Extreme as a genuine threat to someone's life, which the GM Core suggests using only a couple of times across a campaign.
Do hazards count toward the encounter XP budget?
Yes. Hazards use the same level-based XP as creatures. A complex hazard at party level costs the full 40 XP out of your budget, exactly like a party-level monster, while a simple hazard costs a fifth of that.