Electrical Load Estimation Calculator
Static · formula-only · worked example computed when this page was built · no live data
The Electrical Load Estimation Calculator totals connected and demand load for a facility and sizes the main breaker. Example: for a facility with 8 kW lighting, a 15 kW motor, and two 5 kW aircon units, on a 3-phase 4-wire 400/230 V supply, Demand load = 36.75 kW, Demand = 42.06 kVA, Main breaker = 80 A (per PEC 2017 Art. 2.10 / 2.20 | IEC 60364).
How it works
Computed from your inputs per PEC 2017 Art. 2.10 / 2.20 | IEC 60364. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
Worked example (Electrical & Power)
Inputs: a facility with 8 kW lighting, a 15 kW motor, and two 5 kW aircon units, on a 3-phase 4-wire 400/230 V supply.
| Result | Value |
|---|---|
| Demand load | 36.75 kW |
| Demand | 42.06 kVA |
| Main breaker | 80 A |
Computed by WorkHive's calculation engine when this page was built; standard: PEC 2017 Art. 2.10 / 2.20 | IEC 60364.
How to use this calculator
- Read the worked example. It uses a facility with 8 kW lighting, a 15 kW motor, and two 5 kW aircon units, on a 3-phase 4-wire 400/230 V supply and shows every number in the method.
- Follow the formula with your own figures: it returns Demand load, Demand, Main breaker, computed per PEC 2017 Art. 2.10 / 2.20 | IEC 60364.
- To compute interactively, open the Electrical Load Estimation Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is an electrical load demand calculator kVA?
The Electrical Load Estimation Calculator is a free online tool that totals connected and demand load for a facility and sizes the main breaker. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following PEC 2017 Art. 2.10 / 2.20 | IEC 60364. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Electrical Load Estimation Calculator in WorkHive. Free, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.