Calculator
Power Consumption Calculator
Estimate daily and monthly energy consumption from equipment wattage, quantity, usage hours, and tariff.
Calculator Inputs
Equipment wattage must be a valid number.
Legend
Power consumption legend
Energy use is watts multiplied by quantity and operating hours, divided by 1000 to convert watt-hours to kWh.
Input meaning
- Equipment wattage: enter the measured, quoted, or hospital-approved value in W.
- Quantity: enter the measured, quoted, or hospital-approved value.
- Use per day: enter the measured, quoted, or hospital-approved value in hours.
- Billing period: enter the measured, quoted, or hospital-approved value in days.
- Electricity tariff: enter the measured, quoted, or hospital-approved value in per kWh.
Result interpretation
- Daily energy helps estimate operational load.
- Period energy and cost help compare lifecycle cost between equipment options.
Assumptions
- Nameplate wattage may differ from actual measured load.
- Use measured power for precise energy audits.
Biomedical use
- Useful for TCO models, UPS/generator load discussions, energy audits, and equipment replacement planning.
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 |
|---|---|---|---|
| Equipment wattage | Device label says 500 W. | Small devices 20-300 W; monitors/workstations 80-500 W; larger equipment can be 1-10 kW or more. | Use measured watts for energy studies; nameplate may represent maximum draw. |
| Quantity | 12 patient monitors. | Use the number of identical devices in the department or procurement lot. | Group only identical devices together. |
| Use per day | 24 hours for ICU monitors; 8 hours for outpatient equipment. | 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. |
| Billing period | Example: 1 days. | Use 30 days for monthly cost, 365 days for annual energy estimates. | Use a site-specific value and document the source beside the result. |
| Electricity tariff | 0.15 per kWh. | Use the hospital finance tariff per kWh in local currency. | Enter the tariff number only; currency follows your local finance value. |
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.
- Wattage
- Quantity
- Hours per day
- Days
- Tariff
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- Nameplate wattage may differ from actual measured load.
- Use measured power for precise energy audits.
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