Conduit Bending
Saddle bends, offsets, kicks, segment bends, rolling offsets, and conduit bend multipliers for field layout.
Electrical Calculators for Motors, Solar, Voltage Drop, and Loads
Find calculators for motors, conduit bends, wire sizing, voltage drop, lighting, solar, backup power, and test readings.
Calculator Categories
Browse calculation families by equipment, field task, and electrical method.
Electrical Formulas
Voltage, current, resistance, power, energy, power factor, and cost calculators for basic electrical math.
Estimating And Material Planning
Material takeoff, conduit cut length, wire pull length, waste allowance, and job quantity calculators.
Lighting And Illumination
Lumens, footcandles, lux, fixture count, lighting load, emergency lighting, and lighting energy calculators.
Load Calculations
Residential, commercial, industrial, feeder, panel, service, appliance, HVAC, and EV load calculators.
Motors And Power Quality
Motor current, starter sizing, VFD checks, transformer kVA, generator load, harmonics, and power quality.
Solar And Backup Power
Battery capacity, runtime, inverter size, UPS capacity, generator load, fuel use, and backup power planning.
Solar And PV Systems
PV array size, solar panel count, string voltage, cable voltage drop, charge controller checks, and solar energy output.
Testing, Protection And Grounding
Insulation resistance, short-circuit current, pull-box sizing, grounding, bonding, touch voltage, and protection checks.
Wire, Cable And Raceway
Wire size, cable resistance, raceway fill, ampacity, voltage drop, bend radius, and pull-length calculators.
Available Calculators
Open a calculator to enter values, inspect the formula, and read the result units.
Cable Pull Bend Count Calculator
Total the directional change in an entered pull route and compare cumulative and single-bend angles with project or manufacturer limits.
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Cable Jacket Diameter Calculator
Calculate nominal and tolerance-adjusted cable outside diameter and circular area from conductor diameter and concentric layer thicknesses.
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Breaker Size Calculator
Apply an entered continuous-load factor to a load schedule and compare the adjusted current with a selected breaker rating without choosing a device automatically.
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Breaker Interrupting Rating Calculator
Compare a breaker interrupting rating with available fault current and calculate rating margin and utilization.
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Box Fill Calculator
Compare entered conductor, device, clamp, and grounding allowances with an electrical box volume.
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Battery Energy Cost Calculator
Calculate usable energy, charging energy, annual delivered energy, and cycling cost from battery capacity, efficiency, cycles, and energy rate.
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Battery Discharge Current Calculator
Calculate battery-side current from a stated load, nominal battery voltage, and conversion efficiency.
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Backup Load Priority Calculator
Compare critical and essential backup loads with reserved source capacity to identify supportable optional load.
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Backup Generator Sizing Calculator
Calculate backup generator running load, starting contribution, reserve, and planning kVA from entered load conditions and power factor.
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Available Fault Current Calculator
Calculate available fault current from transformer kVA, secondary voltage, phase, impedance, and an entered source multiplier.
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Arc Flash Study Scenario Comparison Calculator
Compare compatible arc-flash study records by method, units, source, and numerical difference.
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Arc Flash Input Data Completeness Calculator
Measure completeness of an entered arc-flash study input list without calculating incident energy.
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Arc Flash Boundary Calculator
Compare a documented arc-flash distance with an entered distance and report signed and absolute differences.
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Approach Boundary Worksheet Calculator
Compare two documented approach-distance records after unit conversion and report the signed difference.
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Annual Equipment Energy Calculator
Calculate daily and annual energy, annual cost, and average power from equipment wattage and operating schedule.
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AC Watts From Voltage And Current Calculator
Calculate single-phase AC active power in watts from RMS voltage, RMS current, and power factor.
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AC VA From Voltage And Current Calculator
Calculate single-phase AC apparent power in VA from RMS voltage and RMS current.
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AC Circuit Current Calculator
Calculate single-phase or balanced three-phase AC line current from real power, RMS voltage, power factor, and phase model.
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24 VDC Control Voltage Drop Calculator
Estimate 24 VDC control-circuit voltage drop, load voltage, and margin against a documented minimum load voltage.
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Wireway Fill Calculator
Calculate preliminary wireway fill from verified internal dimensions and conductor or cable area data.
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Wire and Cable Takeoff Calculator
Calculate a preliminary wire and cable takeoff from route rows, quantities, allowances, parallel runs, and waste.
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Three-Phase Voltage Unbalance Calculator
Calculate three-phase voltage unbalance from measured line-to-line readings and an entered reference.
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VFD Volts-per-Hertz Calculator
Calculate a VFD base volts-per-hertz reference from motor nameplate voltage and frequency using the specified drive manual.
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VFD Dynamic Braking Resistor Calculator
Calculate braking energy, peak resistor power, average duty power, and minimum resistance from entered inertia and speed change.
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