Oxygen Tank Duration Calculator
Ever wondered how long your portable oxygen tank will last? This calculator helps you estimate the remaining duration based on its size, current pressure, and your prescribed flow rate.
Enter your tank details below and click “Calculate Duration”
How This Calculator Works
This tool estimates the duration of oxygen supply using a standard formula:
Duration (minutes) =
( (Tank Pressure – Safe Residual Pressure) × Tank Factor ) / Flow Rate
- Tank Pressure: The current pressure in your oxygen tank, measured in PSI (pounds per square inch).
- Safe Residual Pressure: The minimum pressure you should leave in the tank before changing it. This ensures the tank doesn’t run completely empty, which can vary but is often around 200-500 PSI. We use 200 PSI as a default.
- Tank Factor: A conversion factor specific to the size of your oxygen cylinder. It helps convert the pressure into usable volume of oxygen. Common factors are provided in the dropdown.
- Flow Rate: The rate at which oxygen is delivered, prescribed by your doctor, measured in LPM (liters per minute).
Important Considerations:
This calculator provides an estimate only. Actual duration can be affected by temperature, the accuracy of your pressure gauge, and small variations in tank factors.
- Always monitor your tank’s pressure gauge frequently.
- Plan to switch to a new tank or stationary supply well before the estimated time runs out.
- Consult your healthcare provider or oxygen supplier for precise information regarding your equipment and usage.
- Never let your tank run completely empty unless specifically instructed.