99 Nights Survival Calculator
Plan fuel gathering — Logs, Coal, Fuel Canisters, Oil Barrels — to upgrade the campfire and unlock the true ending before Night 99.
Current Night
98 nights remaining until Night 99.
Target Campfire Level
Team Size
Fuel pool is shared — larger parties don't multiply the requirement but do make gathering faster.
Fuel Already Stockpiled
Fuel Plan
Pacing
On pace
Night progress 1% · Fuel progress 0%
Mixed fuel units across 1 player over 98 nights (midpoint of range).
Children Unlocked at Level 6
Dino Kid
Red-key cave. Map placement is procedurally generated — use the missing-child poster at the crafting bench and the in-game compass to navigate.
Kraken Kid
Blue-key cave. Procedurally placed — check the poster for this run's direction.
Squid Kid
Yellow-key cave, guarded area reached only after upgrading to Level 5.
Koala Kid
Gray-key cave. The deepest and most heavily guarded cave, only accessible at maximum campfire level.
How the Calculator Works
The campfire in 99 Nights in the Forest is upgraded by burning fuel to fill a bar to 100%. Four fuel types are used across the six levels: Logs, Coal, Fuel Canisters, and Oil Barrels (at Levels 5+). This calculator sums the cumulative fuel cost from your target level, subtracts what you've already stockpiled, and shows what's left — as a range, since community-sourced costs vary by party size and biofuel processor usage.
Campfire Upgrade Costs
Per-level (not cumulative). Ranges reflect variability observed by community guides.
| Level | Logs | Coal | Fuel Canisters | Oil Barrels | Unlocks |
|---|---|---|---|---|---|
| Lv 2 | 6 | — | — | — | Larger safe zone, Dino Kid cave accessible |
| Lv 3 | 11 | 7 | 2 | — | Expanded safe zone, campfire benches added |
| Lv 4 | 50–75 | 23 | 9–12 | — | Kraken Kid cave accessible, larger camp footprint |
| Lv 5 | 70–120 | 45 | 19–25 | 4 | Squid Kid cave accessible, stone base built around campfire |
| Lv 6 | 275–350 | 170 | 35 | 8 | Koala Kid cave accessible, true-ending path unlocked at night 99 |
Frequently Asked Questions
How much fuel do I need for the true ending?
Reaching Campfire Level 6 requires approximately 412-562 Logs, 245 Coal, 65-74 Fuel Canisters, and 12 Oil Barrels cumulative. You also need to rescue all four children — Dino Kid (Red key, Level 2), Kraken Kid (Blue key, Level 4), Squid Kid (Yellow key, Level 5), and Koala Kid (Gray key, Level 6) — and survive to Night 99.
Why are the costs shown as ranges?
Community-documented fuel costs fluctuate based on party size and whether you've built a Biofuel Processor. The ranges capture the minimum and maximum reported in the 99nightsintheforest.wiki guide.
What does "pacing" mean in the results?
Pacing compares your night progress (current night / 99) against your fuel-gathering progress (midpoint of cumulative target). If fuel progress leads night progress by 5% or more, you're ahead. If it trails by 5% or more, you're behind and need to gather faster.
Does team size change the fuel required?
The campfire fuel pool is shared, so larger parties don't multiply the requirement. They do, however, make gathering faster — the calculator divides the remaining fuel by team size to show a per-player-per-night target.