PRELIMINARY ENGINEERING TOOL
kW / kVA / amps calculator
Convert electrical load ratings with transparent assumptions and a substituted formula.
Inputs
Calculation steps
I = 10000.000 / (230.000 × 0.8)
Formula ID: POWER_SINGLE_PHASE_KW_V1
System voltage factor: 230.000
Assumptions and references
Preliminary calculation only. Verify inputs, manufacturer data, applicable standards, fault levels, and local requirements before construction or procurement.
UNDERSTAND THE TOOL
What this calculator does
This guide explains a preliminary conversion from active power to current for DC, single-phase AC and balanced three-phase AC loads. It is useful for an early design check, not for equipment selection or a compliance assessment.
How to use it
- Choose the system type: DC, single-phase AC, or balanced three-phase AC.
- Enter a realistic operating voltage and the electrical power input.
- For AC, enter power factor. If the value is mechanical output power, identify efficiency before converting.
- Review the substituted formula, assumptions and result before taking the next design step.
Fields and meanings
- Power
- The requested load in W or kW. Electrical input and mechanical output are not interchangeable.
- Voltage
- The system voltage at the point relevant to the calculation.
- Power factor
- For AC loads, the fraction linking apparent and active power.
- Efficiency
- Used only when converting mechanical output to electrical input.
Review required. Starting current, harmonics, duty cycle and diversity are outside this simple conversion.
Read the full power conversion article →