Electrical Load Calculator
Create a preliminary electrical-load estimate from general loads, fixed heating, motor demand, diversity, startup demand and reserve capacity.
Default project preview
16.38 kW
Connected load
12.8 kW
Estimated current
75.8 A
Motor-start addition
3.6 kW
Apparent power
18.2 kVA
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Diversified demand = non-motor connected load × demand factor + motor running load. Peak capacity adds motor starting demand and reserve. Current depends on voltage, phases and power factor.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Electrical Load Calculator questions
Is connected load the same as demand load?+
No. Connected load totals nameplate loads, while demand estimates which loads are likely to operate together under applicable rules.
Why include motor starting demand?+
Motors and compressors can draw substantially more power during startup than while running.
Can this size a breaker or electrical service?+
No. Electrical sizing must follow applicable code and equipment data under a qualified designer or electrician.