Calculator
Medical Gas Consumption Calculator
Estimate daily medical gas consumption from flow rate, number of outlets or patients, and usage hours.
Calculator Inputs
Flow per user must be a valid number.
Legend
Medical gas legend
Daily gas consumption is estimated by multiplying flow per user, number of users, daily hours of use, and 60 minutes per hour.
Input meaning
- Flow per user: average flow per patient, outlet, ventilator, flowmeter, or equipment connection.
- Number of users/outlets: simultaneous users for the planned scenario.
- Use per day: expected daily operating hours.
- Cylinder usable volume: optional value for estimating cylinders per day.
Result interpretation
- Daily liters and cubic meters help with manifold planning and bulk oxygen estimates.
- Cylinder estimate is only as reliable as the usable cylinder volume entered.
Assumptions
- The average flow represents real clinical use.
- Diversity, peak flow, leaks, and emergency surge demand are reviewed separately.
- Pipeline sizing is not determined by this simple daily-use estimate.
Biomedical use
- Useful for oxygen demand estimates, ward expansion planning, cylinder stock review, and emergency preparedness discussions.
How to identify the required values
Use these examples to choose values from gauges, labels, manuals, datasheets, or service reports.
| Field | Example value | Tip |
|---|---|---|
| Flow per user | Oxygen flowmeter set to 5 L/min. | Use average expected flow for planning; use higher values for surge/emergency scenarios. |
| Number of users | 10 ward beds expected to use oxygen simultaneously. | Enter simultaneous users, not total installed outlets. |
| Use per day | 8 hours/day for intermittent use; 24 hours/day for continuous use. | Use clinical operating assumptions agreed with the department. |
| Cylinder usable volume | A cylinder may provide 680 L usable volume depending on size/fill. | Use local cylinder volume after reserve; leave 0 if you only need daily liters and cubic meters. |
Input Checklist
Confirm these values before relying on the output for procurement, PM, or service planning.
- Flow per user
- Number of users
- Hours per day
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- Actual consumption varies with clinical practice and peak demand.
- Pipeline sizing and manifold design require qualified engineering review.