Power conversion
How to convert kW to amps for preliminary electrical work
Understand the relationship between power, voltage, power factor and efficiency before estimating current.
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Learn the calculation before you use it
Practical, preliminary engineering explainers for the core calculator suite. Every article links back to the relevant tool and makes its limits clear.
Power conversion
How to estimate kW from amps
Turn a measured or design current into a transparent preliminary active-power estimate.
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Three-phase systems
Balanced three-phase current: the preliminary calculation
See why line voltage, active power and power factor matter in a balanced three-phase current estimate.
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Circuit performance
Voltage drop: route length, conductor data and preliminary checks
Use cable resistance/reactance or simplified resistivity inputs to estimate end voltage and losses.
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Cable assessment
Preliminary cable sizing with custom engineering data
Evaluate your own cable candidates against ampacity, correction-factor and voltage-drop checks.
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Protection relation
A preliminary Ib ≤ In ≤ Iz breaker relationship check
Explore the basic relation between design current, nominal breaker rating and corrected cable capacity.
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