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Oxygen Cylinder Duration Calculator

Work out oxygen cylinder duration instantly with clear inputs, formula shown and shareable results.

About Oxygen Cylinder Duration Calculator

Multiplies cylinder gauge pressure by water capacity to get the free gas volume, then divides by the delivery flow rate to give run time.

Formula

Cylinder duration

Available gas (L) = gauge pressure (bar) x water capacity (L); duration (min) = available gas / flow (L/min)

Worked example

With the default values below, Oxygen Cylinder Duration Calculator returns Duration remaining of 5h 43m. Change any input above and every figure here is recalculated in your browser.

Inputs used

Cylinder gauge pressureaccepts 5–300 bar
137 bar
Cylinder water capacityaccepts 0.5–50 L
10 L
Oxygen flow rateaccepts 0.5–60 L/min
4 L/min

Results

Duration remaining
5h 43m
Free gas available
1,370 L
Duration
5.71 h

Step by step

  1. 1Values used
  2. 2Cylinder duration
  3. 3Duration remaining= 343
  4. 4Free gas available= 1,370 L
  5. 5Duration= 5.71 h

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Should the cylinder be run to empty?

No. A reserve of around 20% is normally kept, so subtract that from the usable volume when planning transfers.

Does this work for psi gauges?

Convert first: 1 bar is about 14.5 psi, so divide a psi reading by 14.5.

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