Electrical engineering calculators.
Explore the numbers behind electrical loads, transformers, storage and data-center electricity use. Every tool shows its formula, units and worked steps.
Educational reference only. Examples and calculator results are not approved installation designs, equipment selections or operating instructions. No independent engineering peer review is claimed.
Three-phase current calculator
Convert a balanced three-phase electrical load from kW to line current and apparent power, with the calculation shown.
Open calculator LEARN BY CALCULATINGPower-factor correction calculator
Explore the theoretical reactive compensation needed to improve a lagging power factor while keeping active power constant.
Open calculator LEARN BY CALCULATINGTransformer loading calculator
Compare a load’s apparent power with a transformer’s nameplate kVA rating. This is a loading ratio, not a thermal approval.
Open calculator LEARN BY CALCULATINGBattery runtime calculator
Estimate constant-load runtime from stored energy, a usable fraction and discharge efficiency, while checking the AC power limit.
Open calculator LEARN BY CALCULATINGAnnual electricity use calculator
Turn a hypothetical facility’s MW load into annual MWh and GWh using its operating hours and average load fraction.
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