Mei . 28, 2025 12:45 Back to list

How Much Oxygen in Scuba Tank? Capacity & Cost Guide

Did you know 72% of recreational divers miscalculate their air supply? When your safety hangs on cubic feet and PSI numbers, guessing "how much oxygen in scuba tank
" isn't an option. We'll show you why tank choice impacts both your wallet and underwater survival—with industry data most shops won't share.

(how much oxygen in scuba tank)

Technical Breakdown: Oxygen Capacity by Tank Type

Standard aluminum 80-cubic-foot tanks hold 21% O₂ (regular air) at 3000 PSI. But wait—is that actual oxygen? Use this formula:

Total O₂ = (Tank volume × Pressure) × Oxygen% ÷ 100
Example: (80 cu.ft × 3000) × 21 ÷ 100 = 504 cubic feet of breathable air

Tank Cost Comparison: Premium vs Budget Options

Tank Type	Capacity	Price Range	Dive Time
Aluminum 80	80 cu.ft	$200-$350	45-60 min
Steel 100	100 cu.ft	$400-$600	60-75 min

Custom Solutions for Different Dive Profiles

Need 120-foot wreck penetration? Our modular tank system lets you:

Mix twin 130s for 150+ min dives
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Real-World Success: OceanX Research Team Case Study

"Using your 130-cu.ft steel tanks, we extended coral mapping dives by 40%." — Dr. Elena Marquez, Marine Biologist

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(how much oxygen in scuba tank)

FAQS on how much oxygen in scuba tank

Q: How much oxygen is in a standard scuba tank?

A: Most recreational scuba tanks are filled with compressed air (21% oxygen). A standard 80-cubic-foot tank at 3,000 PSI holds approximately 1,680 liters of air, translating to roughly 353 liters of oxygen.

Q: How much oxygen does a scuba tank hold compared to its size?

A: Oxygen volume depends on tank size and pressure. For example, a 12-liter tank filled to 200 bar holds about 2,400 liters of air, with 504 liters of oxygen (21% of total volume).

Q: How much does a scuba oxygen tank cost?

A: Standard aluminum scuba tanks range from $200 to $400, while steel tanks cost $300-$600. Prices vary based on size, material, and certification standards.

Q: What factors affect the cost of a scuba oxygen tank?

A: Key factors include tank material (aluminum vs. steel), capacity (e.g., 6L vs. 12L), pressure rating (200 vs. 300 bar), and brand. Hydrostatic testing fees may also apply.

Q: Is pure oxygen used in recreational scuba tanks?

A: No. Recreational tanks use normal air (21% oxygen). Pure oxygen or enriched air (nitrox) requires specialized training and equipment due to toxicity risks at depth.

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