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.
Generator Fuel Cost Calculator
Projects generator fuel use, total fuel expense, and hourly operating cost from entered burn rate, runtime, and fuel price.
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Energy Savings Payback Calculator
Estimates simple energy-project payback from annual kWh savings, electricity rate, and project cost, without modeling financing, rebates, or escalation.
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Earth Electrode Test Calculator
Summarize earth-electrode test readings, resistance spread, calculated resistance, and comparison margin for qualified field review.
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Dwelling Water Heater Load Calculator
Review residential water-heater connected and assessed current for tank, tankless, or heat-pump equipment using entered nameplate or rated-power data.
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Dwelling Small Appliance Load Calculator
Builds a dwelling small-appliance load line from circuit count, entered VA allowance, demand factor, and any existing appliance rows needing duplicate-entry review.
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Dwelling HVAC Load Calculator
Compares dwelling cooling, heating, and auxiliary-heat inputs as current values for preliminary service planning before equipment-specific MCA/MOCP review.
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Dwelling General Lighting Load Calculator
Calculate a dwelling general-lighting load from floor area and an entered VA-per-square-foot basis, with an optional documented override.
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Electrical Duct Bank Concrete Volume Calculator
Calculate duct-bank envelope volume, conduit void volume, concrete volume, and waste-adjusted order quantity from verified layout dimensions.
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CT Ratio Test Calculator
Calculate expected and measured current-transformer ratios from nameplate and test readings, then compare the deviation with an entered review reference.
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Control Transformer VA Calculator
Compares sealed VA, simultaneous inrush VA, control voltage, and planning margin into a preliminary control-transformer VA basis and secondary-current context.
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Control Panel Heat Load Calculator
Totals control-panel component losses, duty factors, and external heat into watts, BTU/h, and estimated airflow for thermal review.
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Conduit Support Spacing Calculator
Calculate intermediate and total conduit support points from run length, end allowances, fitting locations, and a source-verified maximum support interval.
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Conduit Expansion Movement Calculator
Estimates signed and absolute conduit thermal movement plus preliminary fitting count from run length, temperatures, coefficient, and fitting movement.
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Conductor Weight Calculator
Calculate conductor or cable material weight from verified unit weight, route length, quantity, parallel runs, waste, and reel tare.
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Conductor Resistance Calculator
Calculate DC conductor resistance and conductance from resistivity, length, and cross-sectional area at an entered reference condition.
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Conductor Current Density Calculator
Reports conductor current density from current and cross-sectional area while keeping ampacity, insulation, and installation decisions separate.
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Conductance Calculator
Converts resistance to conductance in siemens for reciprocal circuit relationships and parallel-network checks.
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Commercial Pump Load Calculator
Calculate pump hydraulic power, shaft power, electrical input, and running current from flow, head, fluid, efficiency, voltage, phase, and power factor.
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Commercial Kitchen Load Calculator
Estimates commercial kitchen demand from connected equipment load, an entered demand factor, and the two-largest-equipment floor while keeping code factor selection separate.
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Commercial HVAC Load Calculator
Compares commercial HVAC motor FLA, heater load, voltage, phase, and manufacturer reference values for preliminary load and MCA review.
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Commercial Fan Load Calculator
Calculate fan shaft power, electrical input, and running current from airflow, pressure, efficiency, voltage, phase, and power factor.
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Commercial Data Center Load Calculator
Turns rack count, rack load, PUE, UPS efficiency, voltage, phase, and growth allowance into data-center load and capacity planning values.
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Capacitor Series Value Calculator
Combines two or three ideal series capacitors into equivalent capacitance while leaving voltage sharing, ESR, tolerance, and balancing checks separate.
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Capacitor Parallel Value Calculator
Combines two or three ideal parallel capacitors into equivalent capacitance while keeping ripple current, ESR, tolerance, and ratings separate.
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