Oxygen cylinder duration

Minutes of oxygen left at a given flow.

Cylinder capacity when full

Pressure gauge reading

% of full

Flow

L/min

Duration

150 min

Adequate for short transfer; keep 30 min reserve

Under 30 min: arrange a replacement now

Adequate for short transfer; keep 30 min reserve

Formula

capacity * (fill / 100) / flow

Notes

Default 1500 L ≈ Indian B-type medical O₂ cylinder (≈ 1.5 m³). Capacities vary by type and filler; read the cylinder label, or use o2-cylinder-contents (water capacity × pressure). Keep a 30-minute reserve.

Used in

Oxygen prescription and SpO2 targets Safe transfer of a sick child to PICU Intra- and inter-hospital transfer checklist Oxygen cylinder planning

Calculators support, not replace, clinical judgement. Check inputs and units, and confirm doses with your unit protocol.