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.
Conduit 90-Degree Bend Take-Up Calculator
Calculate a stub-up bend mark from desired height and an entered bender take-up record.
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Conduit 45-Degree Bend Calculator
Calculate 45-degree tangent travel, diagonal travel, arc length, and entered layout length from rise, radius, and straight allowance.
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Conduit 30-Degree Bend Calculator
Calculate 30-degree tangent travel, diagonal travel, arc length, and entered layout length from rise, radius, and straight allowance.
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Conductor Temperature Rise Calculator
Calculate conductor operating temperature with an I-squared rise check from entered current, reference ampacity, ambient temperature, and rating.
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Conductor Short-Circuit Withstand Calculator
Calculate adiabatic withstand time, clearing-time margin, and I-squared-t from entered conductor and fault-current values.
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Conductor Ampacity Correction Factor Calculator
Multiply entered ampacity correction factors by base ampacity and compare the adjusted ampacity with entered load current.
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Commercial Warehouse Load Calculator
Calculate connected warehouse load, entered-demand warehouse load, continuous-load adder, adjusted load, and line current from entered rows.
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Commercial Tenant Load Calculator
Calculate connected tenant load, entered-demand tenant load, and capacity margin from commercial tenant load groups.
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Commercial Retail Load Calculator
Calculate connected retail load, entered-demand retail load, continuous-load adder, adjusted load, and line current from entered rows.
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Commercial Receptacle Demand Calculator
Calculate connected receptacle load, entered-demand receptacle load, continuous-load adder, adjusted load, and line current from entered rows.
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Commercial Phase Allocation Calculator
Compare three entered phase loads with their average, show phase currents, quantify imbalance, and provide an equalizing transfer estimate.
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Commercial Panel Capacity Calculator
Compare an entered commercial panel rating with connected VA under a stated phase model, including current, utilization, and capacity margin.
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Commercial Office Load Calculator
Calculate connected office load, entered-demand office load, continuous-load adder, adjusted load, and line current from entered rows.
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Commercial Neutral Diversity Calculator
Calculate linear three-phase neutral current, apply an entered diversity percentage, and show phase-current imbalance.
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Commercial Load Diversity Calculator
Calculate connected load, diversified load, diversity reduction, and capacity margin from entered commercial load blocks.
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Commercial Lighting Demand Calculator
Calculate connected lighting load, entered-demand lighting load, continuous-load adder, adjusted load, and line current from entered rows.
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Commercial Feeder Voltage Drop Calculator
Calculate feeder voltage drop, percentage drop, end voltage, and resistive loss from entered conductor-resistance assumptions.
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Commercial Elevator Load Calculator
Calculate input kW, duty-adjusted kVA, and current from entered elevator motor assumptions.
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Circuit Identification Calculator
Compare entered three-phase line-to-line readings with nominal voltage and show the largest deviation.
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Charge Controller Size Calculator
Calculate array current, margin factor, and recommended controller current from PV array watts, battery voltage, and sizing margin.
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Carbon Emissions from Electricity Calculator
Calculate electricity-related CO2e in pounds, short tons, and metric tons from measured energy use and an entered emissions factor.
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Cable Tray Width Calculator
Calculate the tray width required for an entered cable envelope after spacing, usable-width, and edge-clearance assumptions, then compare it with a candidate tray.
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Cable Tray Separation Calculator
Calculate required tray width, separation allowance, and tray-width margin from entered cable group spacing values.
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Cable Tray Fill Calculator
Compare cable area rows with a tray area limit while keeping layout, tray construction, and standards review separate.
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