Planning a deep dive in Subnautica 2? Use this calculator to figure out exactly how long you can safely explore at your target depth before running out of breath. No more panicking at 500m depth wondering if you'll make it back!
Dive Time Calculator
Your Current Equipment
Target Depth
Your Results
⚠️ Pro tip: Always leave 25% oxygen as a safety buffer. That means your safe exploration distance is only ~37.5% of your total dive time one-way!
Depth Reference Guide
Here's a quick reference for common depth ranges in Subnautica 2:
Maximize Your Dive Time
🎒 Carry Backup Tanks
Always have at least one extra oxygen tank in your inventory. You can swap to a fresh tank when your current one runs low, effectively doubling your exploration time.
🏠 Establish Forward Bases
Building small bases at different depths acts as oxygen refill stations. Even a single compartment with air can save your life when you're far from your main base.
🐟 Harvest Air Bladders
Air Bladders let you ascend without actively swimming, conserving oxygen. Save your breath for the descent where you actually need it!
⚡ Upgrade Your Suit
Suit upgrades that increase oxygen capacity are game-changers for deep exploration. Prioritize these upgrades if you're planning serious dives.
Frequently Asked Questions
Does depth affect oxygen drain rate?
Yes! The deeper you go, the faster your oxygen depletes. At extreme depths (500m+), you may notice your oxygen bar dropping noticeably faster than at surface levels.
How long does it take to refill oxygen at the surface?
Full oxygen refill takes about 8 seconds at the surface. Inside a base or the escape pod, it's instant.
Can I extend oxygen with food/water?
No, oxygen is completely separate from hunger and thirst. Food and water affect your health, not your breath.
What's the maximum oxygen capacity possible?
With suit upgrades and 4 extra tanks, you can reach around 180+ oxygen units, giving you roughly 2.5 minutes of underwater time.