If you don’t have access to the calculator above simply use the following formula to calculate the minutes remaining in your oxygen tank:
Here’s what you will need:
- Tank size & conversion factor for that tank
- PSIG (amount of pressure remaining in the tank)
- Flow rate (LPM)
Formula: Minutes remaining = PSIG * Tank conversion factor/Flow rate
| Tank Size | Conversion factor |
| E | 0.28 |
| D | 0.16 |
| H | 3.14 |
| M | 1.56 |
