O2 Calculator Companion

Smarter oxygen monitoring for medics in the field. Fast, offline-ready tank duration calculator with real-time alerts and zero fluff.

The O₂ Calculator Companion is a mission-critical tool designed for EMS professionals, paramedics, and emergency responders.

Quickly and accurately estimate oxygen tank duration in real-time based on tank type, PSI, and flow rate — all in the palm of your hand. Built to perform under pressure, this app helps eliminate guesswork in critical care scenarios where every second counts.

Designed for Field Use: Fast, intuitive interface optimized for iPhone and iPad

Minimal taps to enter tank data and get immediate duration estimates

Works offline — no internet needed in remote or chaotic environments

Key Features: Supports multiple tank types (D, E, M, Jumbo D, etc.)

Adjustable PSI and flow rate settings

Automatic safety margin factored into calculations (default 200 PSI)

Smart alerts for Insufficient O₂ and Sufficient O₂

Custom caution zone alerts before depletion

Responsive modal-style warnings to enhance decision-making in the field

Built for Real-World EMS: Ideal for ambulance crews, flight medics, field hospitals, and disaster response teams

Created by EMS professionals with real frontline experience

Use it during patient transport, at scene, or in clinical training environments

Data & Privacy: No personal data collected. No login required. Just reliable calculations when you need them most.

Why O₂ Calculator Companion? Paramedics, EMTs, and emergency responders rely on rapid, accurate tools. The O₂ Calculator Companion empowers you to confidently manage oxygen resources with a simple, high-clarity interface and built-in alerting logic — no clutter, no distractions, just performance.

Join the thousands of EMS professionals already optimizing care with smarter oxygen monitoring.