Scuba Tank Capacity
Accurate tank gas volumes
Free · Designed for iPad. Not verified for macOS.
Scuba Tank Capacity is a precision gas calculator for scuba divers who want accurate gas content calculations—not just ideal gas estimates.
Why Z-Factor Matters
At high pressures (200+ bar), gases don't behave ideally. The Z-factor compressibility correction accounts for real gas behavior, giving you the actual usable gas in your tank—typically 5-10% less than ideal calculations suggest.
Features:
• Calculate actual gas content with Z-factor correction
• Compare multiple tanks side-by-side
• Support for Air, Nitrox, Trimix, and Heliox
• Normoxic and hypoxic mix support for technical diving
• Twin tank configurations with automatic volume doubling
• Pre-configured tanks: Steel 6.8-18L (200/300 bar), AL63, AL80, AL100, HP80, HP100
• Pre-configured twin sets: Steel 6.8L, 7.5L, 10L, 12L, AL80, HP100
• Add unlimited custom tank and gas profiles
• Temperature compensation (0-40°C)
• Works offline—no internet required
Built for Divers
Whether you're planning a recreational dive or comparing tank options for technical diving, Scuba Tank Capacity gives you the numbers you need. See exactly how much gas each tank holds at your fill pressure and temperature.
Perfect for:
• Recreational divers planning gas consumption
• Technical divers comparing tank and gas configurations
• Dive shops and fill stations
• Anyone buying or renting tanks
No ads. No subscriptions. Just accurate calculations.
Disclaimer
This app is provided as a planning tool only. Always verify calculations independently and follow proper dive planning procedures. Use at your own risk—the developer assumes no liability for dive planning decisions made using this app.
Photo Credits
Photos by NEOM, Sebastian Pena Lambarri, and Nazarizal Mohammad on Unsplash (https://unsplash.com/)
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixes gas volume calculations for twin (dual) tank sets, which previously reported half the correct amount. Single tank calculations are unchanged.
The developer, Anthony Dupre, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anthony Dupre
- Size
- 36.1 MB
- Category
- Sports
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Reedlabs