How Strength & Athleticism Work in The Forest
Strength runs from 20 to 99. The files store 0.001 strength per calorie eaten and 0.0047 per fight action, so the whole climb is 79,000 calories or 16,809 fight actions.
- Strength range20–99floor 10
- Per calorie eaten0.00179,000 calories to the cap
- Per fight action0.00474.7× a calorie
- Run level6000 sof running per level, +5% each
Strength and fitness live in the survival tuning of the client, not in a wiki table. This page reads those numbers and lets you plan with them.

On this page
Strength and skill calculator
Set what you eat, how often you fight and how far you run. The first block gives the days to your target strength at those habits; the second gives the days to a running or breath level.
Strength: days to your target
At this plan
26 days
79 strength to gain, +3.094 a day
Eating alone
79,000 calories
in total, at 0.001 per calorie
Fighting alone
16,809 actions
in total, at 0.0047 per action
This plan burns 2,240 calories a day on what you set above (running and walking at their stored rates, 7 calories per fight action) and matches it with food, so the stored loss rate takes nothing.
For scale, the richest foods the files store hold 600 calories each (Arm, Leg, Lizard, Meat, Rabbit).
Athleticism: running and breath levels
Level 5 needs 30,000 s of running: 25 days. Stored bonus: +25%.
Level 5 needs 7,500 s on lung air: 63 days. Stored bonus: +25%.
The stored rates
Everything the calculator uses, with the field name the files give it.
| Field | Stored value | Used for |
|---|---|---|
| PhysicalStrength: start / min / max | 20 / 10 / 99 | The strength range |
| StrengthGainPerEatenCalory | 0.001 | Strength per calorie eaten |
| FightActionStrength | 0.0047 | Strength per fight action |
| StrengthLossPerMissingCalory | 0.0001 | Strength lost per calorie burnt and not eaten |
| FightActionCalories | 7 | Calories burnt per fight action |
| RunningCaloriesPerSecond / Walking… | 1 / 0.5 | Calories burnt while moving |
| Weight: base / min / max | 205 / 155 / 305 | The stored weight range (no unit in the files) |
| Weight gain / loss per calorie | 0.00015 / 0.00015 | Weight per spare calorie / per missing calorie |
Not stored: what grows with trees
PhysicalStrength also has a CurrentCutDownTreeCount field. The files store no rate for it, so cutting trees is not in the calculator.
Athleticism: running, breath and weight
Two skills have a stored duration per level. Running takes 6,000 s of running per level for a +5% bonus; the breath skill takes 1,500 s on lung air per level for +5%. Lungs hold 20 air and the rebreather 300, 15 times as much.
How many calories a food gives
5 foods tie for the richest stored value, 600 calories each (Arm, Leg, Lizard, Meat, Rabbit), so the whole strength climb by eating is 132 of them.
| Calories stored | Foods |
|---|---|
| 600 | Arm, Leg, Lizard, Meat, Rabbit |
| 500 | Fish |
| 400 | Snack, Soda |
| 300 | Small Meat |
| 200 | Booze, PlaneFood |
| 10 | Amanita Mushroom, Chanterelle Mushroom, Deer Mushroom, Jack Mushroom, LibertyCap Mushroom, Oyster, Puff Mushroom |
| 5 | Marigold |
| 1 | Aloe Vera, Blackberries, BlueBerries, Chicory, Coneflower, Snowberries, TwinBerries |
FAQ
How do you get strong in The Forest?
In the files, strength gains 0.001 per calorie eaten and 0.0047 per fight action, from a start of 20 up to 99.
How long does it take to max strength?
79,000 calories eaten or 16,809 fight actions in total, by the stored rates; the calculator turns that into days at your own habits.
How many levels can running reach?
The files store 6,000 s per level but no maximum level, so we do not state one.
Pages to keep open
Related pages
Sources
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