Online Tool Store
Oxygen Cylinder Duration Calculator
Enter cylinder size, pressure, and flow rate to estimate remaining oxygen supply duration. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Estimated duration
Estimate only — always follow your device's actual gauge and clinical guidance.
How it works
- Choose your cylinder size.
- Enter the current pressure reading and flow rate.
- See an estimated remaining duration.
Estimation multiplies the pressure reading by the cylinder's standard impact factor, then divides by the flow rate — the textbook formula used across respiratory therapy training for estimating remaining oxygen supply.
FAQ
Is this medical advice?
No — this is an estimate for planning purposes only. Always follow your device's actual pressure gauge and your care provider's guidance for medical oxygen use.
Is my data uploaded anywhere?
No. The calculation happens entirely in your browser — nothing is sent to a server.
How is duration calculated?
Using the standard cylinder impact factor formula: pressure × cylinder impact factor ÷ flow rate, giving estimated minutes remaining.
What is a cylinder "impact factor"?
A constant specific to each cylinder size (D, E, M6, and others) representing its internal volume, used in the standard duration formula.
How we compare
| Feature | Online Tool Store | Manual formula lookup | Built-in cylinder gauges |
|---|---|---|---|
| No formula to memorize | ✓ | Requires remembering the impact factor table | Varies by device |
| Free, quick planning check | ✓ | ✓ | N/A |
A built-in gauge shows current pressure, not remaining time. Oxygen Cylinder Duration Calculator applies the standard formula for a quick planning estimate — always verify against your actual device and provider guidance.