Calculator · Updated October 2026
99 Nights in the Forest Calculator
Three quick tools: how long your fuel lasts, how many diamonds your classes cost, and how much wood and scrap your builds need.
- Fuel calculator
- Diamond planner
- 28 crafting recipes
- Checked Oct 24, 2026
This 99 Nights in the Forest calculator does the math for the three things players ask about most: fuel, diamonds and crafting materials. Pick a tab, type your numbers, and the totals update straight away.
Fuel uses the game’s flame rating, diamond prices come from the Daily Class Shop, and recipe costs come from the current Crafting Bench list. Values were checked in October 2026.
99 Nights in the Forest calculator
Enter how many of each fuel you have. The total is in flames, the game’s own fuel rating.
Tick the classes you want and enter the diamonds you already have.
Tick a class to start.
Set how many of each item you want to craft at the Crafting Bench.
How to use the fuel calculator
Every fuel item has a flame rating. The calculator adds them up so you can see if your stock will last the night.
- Type how many logs, chairs, coal, canisters, barrels and corpses you have.
- Total flames is your whole fuel stock.
- Same as this many logs turns it into log terms, since a log is 1 flame.
- Nights at 10 flames is a rough guide based on keeping 10 logs ready per night.
The game shows fuel as flames, not minutes, so treat the night estimate as a planning guide. Full fuel values are in our values guide.
How to use the diamond planner
- Enter the diamonds you have now.
- Tick the classes you want to buy.
- The planner shows the total cost and what you are still missing.
- If you are short, it tells you whether the 47 diamonds from free codes would cover it.
Get those free diamonds from our codes page, and compare perks in the classes guide.
How to use the crafting calculator
Set the number of items you want to build. The calculator totals the wood, scrap, Cultist Gems and Gems of the Forest you need.
| Popular build | Cost |
|---|---|
| Map | 3 wood |
| Good Bed | 10 wood, 10 scrap |
| Teleporter | 15 wood, 25 scrap, 1 Cultist Gem |
| Oil Drill | 25 wood, 35 scrap, 1 Cultist Gem |
| Respawn Capsule | 40 wood, 40 scrap, 1 Gem of the Forest |
Grind chairs for 5 wood each and tires for 3 scrap to reach big builds faster.
Planning tips
Fuel before builds
Keep 10 flames ready for the night before you spend wood on crafting.
Save Oil Barrels
At 4 flames each, they are your late-night insurance.
Cheap classes first
Camper (10) and Scavenger (25) pay off from the first run.
Gems are the bottleneck
Teleporter, Oil Drill and Ammo Crate each need a Cultist Gem, so farm cultist raids.
Our 99 Nights in the Forest script guide explains why “infinite resources” scripts are not worth the ban risk.
FAQs About the 99 Nights in the Forest Calculator
How much fuel does a log give?
One log is 1 flame. Coal is 2, a Fuel Canister 3 and an Oil Barrel 4.
How many diamonds do I need for Assassin?
Assassin costs 500 diamonds. Enter what you have and tick Assassin to see how many you are missing.
How much does a Teleporter cost to craft?
15 wood, 25 scrap and 1 Cultist Gem.
Is the calculator accurate after updates?
It uses values checked in October 2026. If an update changes a price, the in-game number wins; tell us and we will update it.
Does the calculator save my numbers?
No. It runs in your browser and resets when you leave the page.
Why is the night estimate only a guide?
The game rates fuel in flames, not minutes, and burn speed changes with campfire level and events.
Conclusion
Use the fuel tab before every night, the diamond planner before you open the Class Shop, and the crafting tab before big builds like the Teleporter or Respawn Capsule.
Last checked: October 24, 2026.
Independent fan site, not affiliated with Roblox Corporation or Grandma’s Favourite Games. Game details change with updates; tell us through the contact page if something here is out of date.
