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.
Thermal Scan Temperature Difference Calculator
Estimate ambient rise, absolute temperature difference, and threshold margin from component, ambient, and reference temperatures.
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Test Lead Correction Calculator
Correct a measured resistance reading for test-lead resistance and compare the corrected value with an entered reference threshold.
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Terminal Temperature Limit Check Calculator
Compare an entered terminal ampacity with the load-driven requirement after continuous-load adjustment and any spare margin.
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Task Lighting Load Calculator
Estimate connected lighting power, active power, annual energy use, and annual cost from fixture quantity, operating schedule, and electricity rate inputs.
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Step And Touch Voltage Screen Calculator
Compare grid potential rise, step voltage, and touch voltage with project-entered limits without issuing a personnel-safety conclusion.
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Solar Export Energy Calculator
Estimate solar allocation for a defined interval, including direct site use, battery charging, grid export, grid import, and self-consumption share.
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Solar Energy Cost Calculator
Estimate lifetime energy, total cost, and cost per kWh from system cost, annual output, O&M cost, and project lifetime.
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Solar Cable Voltage Drop Calculator
Estimate PV circuit voltage drop, drop percentage, and remaining margin to a 3 percent reference from entered current, resistance, length, and system voltage.
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Solar Battery Runtime Calculator
Estimate usable battery energy and runtime from battery capacity, system voltage, load, depth of discharge, and system efficiency.
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Soft Starter Bypass Calculator
Compare motor running current and a service-factor reference current with an entered soft-starter bypass rating for an early equipment review.
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Shock Risk Screen Calculator
Check whether entered shock-review factor rows are recorded, missing, or unknown without classifying risk or producing a work conclusion.
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Sensor Resistor Calculator
Estimate ideal series-resistor headroom, resistance, and dissipation for a defined DC sensor interface.
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SCCR Calculator
Compare entered component SCCR with available fault current as a documentation check; no equipment determination is made.
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Room Footcandles Calculator
Estimate average room footcandles and lux from total lumens, room area, coefficient of utilization, and light-loss factor for early lighting layout review.
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Restricted Approach Boundary Calculator
Compare a recorded restricted-boundary reference distance with an entered project distance after unit conversion; required boundary selection and entry permission remain outside the result.
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Resistance Measurement Error Calculator
Compare a measured resistance with a reference value and report signed and absolute error in ohms and percent.
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Residential Service Headroom Calculator
Estimate residential service headroom before a planned load by comparing entered service capacity, existing peak demand, planned added load, and an entered coincidence factor.
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Residential Heat Pump Service Load Calculator
Estimate the net added kW from a residential heat-pump conversion and compare the planned peak load with available service capacity.
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Residential Generator Load Calculator
Estimate preliminary residential generator kW and kVA for selected outage loads, including motor-start allowance, reserve factor, power factor, and margin against an entered generator rating.
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Residential EV Diversity Load Calculator
Estimate connected and diversified residential EVSE load, then compare the planning load with an entered capacity allowance.
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Residential Battery Load Calculator
Estimate residential backup battery energy, energy margin, inverter margin, and runtime from essential load, backup duration, efficiency, reserve, and entered equipment ratings.
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Reactive Energy Calculator
Estimate kvarh, kVAh, and phase angle from entered real energy and power factor for preliminary power-factor review.
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Reactance Calculator
Compare XL, XC, and net reactance from entered frequency, inductance, and capacitance for circuit review.
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Range Demand Calculator
Estimate connected range load, demand load, diversity allowance, and effective demand factor from entered range loads.
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