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: measured or expected load per device.
- Quantity: number of identical devices.
- Use per day and billing period: expected operating schedule.
- Tariff: local electricity cost per kWh or internal cost value.
Result interpretation
- Daily energy helps estimate operational load.
- Period energy and cost help compare lifecycle cost between equipment options.
Assumptions
- Load is constant while equipment is operating.
- Standby power, startup peaks, HVAC heat load, and power factor are not fully modeled.
- Tariff is entered in the desired currency.
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 to choose values from gauges, labels, manuals, datasheets, or service reports.
| Field | Example value | Tip |
|---|---|---|
| Equipment wattage | Device label says 500 W. | Use measured watts for energy studies; nameplate may represent maximum draw. |
| Quantity | 12 patient monitors. | Group similar equipment together; calculate separately for devices with different loads. |
| Use per day | 24 hours for ICU monitors; 8 hours for outpatient equipment. | Use realistic operating hours, not department opening hours if devices stay on. |
| Tariff | 0.15 per kWh. | Enter the number only; currency is whatever your local tariff uses. |
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.