Cable Sizing & Voltage Drop Planner
Check current, selected cable ampacity, voltage drop, and minimum cable guidance.
Open ToolElectrical Power Calculators
Cable, breaker, transformer, generator, kVA, ampacity, power factor, and conversion calculators.
Electrical Load Schedule Builder
Build connected load, demand load, kVA, spare capacity, and panel-size guidance.
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Transformer Sizing & Spare Capacity Calculator
Calculate required transformer kVA, standard size, loading percentage, and spare margin.
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Generator Sizing & Starting Load Planner
Estimate generator kVA using running load, starting load, diversity, and spare margin.
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Power Factor Correction & Payback Calculator
Calculate capacitor kVAR, current reduction, transformer relief, and simple payback.
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Conduit Fill Calculator
Calculate conduit fill percentage for cable and raceway planning.
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Short Circuit Current Calculator
Estimate transformer secondary fault current for breaker duty checks.
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Lighting Lux Calculator
Estimate required lumens and luminaire count from lux target and area.
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Breaker Size Calculator
Estimate breaker rating from load current, voltage, phase, and safety margin.
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kVA to Amps Calculator
Convert kVA to amps for single-phase and three-phase electrical loads.
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Ampacity Derating Calculator
Estimate derated cable ampacity from temperature, grouping, and installation factors.
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MEP Unit Converter
Convert common MEP units for airflow, water flow, pressure, power, cooling, and temperature.
Open ToolHow to use this collection
Start with the calculator closest to the project question, load the sample data, then replace values with your project assumptions. Use warnings and methodology notes to decide what needs formal verification before procurement, authority submission, or construction.