Subnautica 2 | All Stat Gauge Explanation

Stats explanation guide for Subnautica 2. Learn about all stats, how to manage Health, Oxygen, Water, and Food, and how to restore your gauges.

Table of Contents

All Stats List
All Survival Stats Explained

Early to Late-Game Progression Guide

All Stats List

Your Survival HUD

While exploring the oceans of Subnautica 2, your survival depends on monitoring the gauges in the bottom-left corner of the screen. Ignoring these meters can quickly lead to health loss and death.

Quick Reference Stats Overview

Stat	Details
Health (HP)	Max Cap: 100 Description Your overall health and life bar. Decreases when taking damage. How to Restore - Use First Aid Kits - Eat a Medical Gel Sac
Oxygen (O2)	Max Cap: Base is 45. Upgradeable Description Your available air supply while underwater. Continuously drains while diving. How to Restore - Surface above water - Use bubbles from Oxygen Tunic - Use an Air Bladder - Use Portable Oxygen
Water (Thirst)	Max Cap: 100 Description Your thirst meter. Gradually decreases over time. How to Restore - Drink Water - Eat raw Water Slugs (Emergency)
Food (Hunger)	Max Cap: 100 Description Your hunger meter. Slowly decreases while exploring. How to Restore - Eat cooked fish - Consume Nutrient Blocks

All Stats Explained

Health (HP)

Your Health meter represents your physical condition and caps at 100. It decreases when taking damage from hostile alien creatures, environmental hazards, drowning, or starvation. If your Health reaches 0, you will die and trigger the reprinting penalty.

Death Guide - Reprinting Penalty

How to Restore Health

You can recover Health by using First Aid Kits, which can be crafted or found inside Supply Crates. You can also consume a Medical Gel Sac for a small amount of health.

Oxygen (O2)

Oxygen is your most important stat while diving. Your base O2 cap starts at 45. The Oxygen meter drains continuously while underwater, and running out of Oxygen causes your vision to fade before eventually leading to drowning and death if you cannot reach safety in time.

Oxygen Cap is Upgradeable

The starting Oxygen cap of 45 is not enough for deeper or longer expeditions, so upgrading it early is highly recommended. You can increase your Oxygen capacity by crafting an Air Tank.

How to Craft Air Tank

How to Restore Oxygen

The most common way to restore Oxygen is by swimming back to the surface. You can also refill it instantly by entering your Lifepod, sea bases, Air Bladder, or vehicles. While exploring deeper areas, Oxygen Tunic releases bubbles and Portable Oxygen can provide emergency breathable air.

How to Manage Your Oxygen

Water (Thirst)

Your Water meter represents your hydration level and caps at 100. Unlike starvation, reaching 0 Water causes immediate death instead of gradual HP loss. Regularly drinking Water or Isotonic Water is essential during exploration.

How to Restore Water

You can restore Water by drinking Water or Isotonic Water crafted at the Fabricator. In emergencies, eating a raw Water Slug from your inventory provides a small hydration boost, but it also lowers your Food meter.

Drinking Water Guide - How to Get Water

Food (Hunger)

Your Food meter tracks your hunger level and caps at 100. While running out of Food is dangerous, reaching 0 does not kill you instantly. Instead, it triggers Starvation, which slowly drains your Health until you eat again.