Measure AC demand, running energy, and cost outputs. Model phase behavior, efficiency, and billing effects using structured engineering inputs today.
| Scenario | Phase | Voltage (V) | Current (A) | Power Factor | Hours/Day | Tariff |
|---|---|---|---|---|---|---|
| Split AC Unit | Single | 230 | 7.5 | 0.92 | 8 | 0.15 |
| Workshop Compressor | Three | 400 | 12 | 0.88 | 6 | 0.18 |
| Production Blower | Three | 415 | 18 | 0.85 | 10 | 0.20 |
Single phase apparent power uses S = V × I. Three phase apparent power uses S = √3 × V × I.
Real power uses P = S × power factor. Reactive power uses Q = S × √(1 − power factor²).
Input power adjusts for losses using Input Power = Real Power ÷ Efficiency.
Running power adjusts duty using Running Power = Input Power × Load Factor.
Energy uses kWh = Running kW × operating hours. Cost uses Cost = kWh × tariff.
AC power consumption depends on voltage, current, and power factor. Engineering estimates also need efficiency and operating time. A motor, compressor, or air conditioning system can draw apparent power that is higher than its real working power. This difference matters because utilities, generators, and protective devices often respond to total electrical demand, not only useful output.
This calculator helps estimate real power, apparent power, reactive power, and total energy use. It supports both single phase and three phase systems. That makes it useful for homes, workshops, equipment rooms, and industrial panels. You can enter current when you measure line conditions directly. You can also enter known output power when equipment ratings are already available.
Efficiency changes the real input demand. A lower efficiency means more electrical input is needed for the same useful output. Load factor adds another practical adjustment. Many machines do not run at full demand all day. By applying a realistic load factor, the calculated energy and cost values become closer to daily operating conditions.
The cost section converts energy into money using the tariff you provide. This is useful for budgeting, comparing equipment options, and reviewing operating schedules. Engineers can use the results to study consumption trends, energy saving opportunities, and phase loading decisions before installation or maintenance planning.
It estimates apparent power, real power, reactive power, energy use, and cost for AC electrical loads using practical operating inputs.
Yes. It applies the √3 multiplier for three phase apparent power and current relationships.
Power factor shows how effectively current becomes useful work. Lower values increase apparent power and system loading.
Efficiency accounts for conversion losses. Lower efficiency means the load needs more input power for the same output.
Load factor represents average operating demand compared with full running demand. It improves everyday energy estimates.
Yes. Enter your electricity rate for one kilowatt-hour. The calculator multiplies that by computed energy usage.
Yes. Select the voltage and current mode, then enter measured electrical conditions directly.
Select known output power mode. The calculator estimates current from voltage, phase type, efficiency, and power factor.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.