Calculator
Medical Gas Consumption Calculator
Estimate daily medical gas consumption from flow rate, number of outlets or patients, and usage hours.
Calculator Inputs
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: enter the measured, quoted, or hospital-approved value in L/min.
- Number of users/outlets: enter the measured, quoted, or hospital-approved value.
- Use per day: enter the measured, quoted, or hospital-approved value in hours.
- Cylinder usable volume: enter the measured, quoted, or hospital-approved value in L.
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
- Actual consumption varies with clinical practice and peak demand.
- Pipeline sizing and manifold design require qualified engineering review.
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 and common working ranges to choose values from gauges, labels, manuals, datasheets, RFQs, service reports, CMMS records, or hospital planning assumptions.
| Field | Example value | Common range | Tip |
|---|---|---|---|
| Flow per user | Oxygen flowmeter set to 5 L/min. | Usually 0.01 L/min or higher; use the real hospital value. | Use the actual set flow or expected average flow for the clinical scenario. |
| Number of users/outlets | 10 ward beds expected to use oxygen simultaneously. | Ward planning often uses simultaneous users, not installed outlets; use the clinical scenario. | Enter simultaneous users, not total installed outlets. |
| Use per day | 8 hours/day for intermittent use; 24 hours/day for continuous use. | Intermittent use often 4-12 h/day; continuous ICU/utility use is usually 24 h/day. | Use real operating hours, not department opening hours if equipment remains on. |
| Cylinder usable volume | A cylinder may provide 680 L usable volume depending on size/fill. | Use local usable volume after reserve; common portable values may be around 400-700 L. | Leave this as 0 if you only need daily liters or cubic meters. |
Common ranges are starting points for hospital planning. For final procurement, acceptance testing, electrical design, medical gas design, radiation shielding, dialysis water systems, or clinical use, replace the example values with site-specific data and vendor-confirmed figures.
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.
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