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.
Operating Cost Comparison Calculator
Compare existing and proposed annual operating costs, annual savings, cost difference, and simple payback from entered energy, rates, fixed costs, and project cost.
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Off Grid Load Calculator
Estimate daily energy, autonomy energy, average current, and amp-hours from an entered off-grid load, runtime, autonomy period, and system voltage.
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Occupancy Sensor Savings Calculator
Estimate annual energy and cost savings from baseline hours, controlled hours, lighting load, operating days, and electricity rate.
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Mounting Height Calculator
Estimate mounting height above the workplane, maximum spacing, row count, and actual row spacing from entered lighting layout values.
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Motor Wye-Delta Current Calculator
Compare across-the-line and ideal wye-start current, reduction, and kVA from entered three-phase values.
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Motor Torque From Power Calculator
Convert entered horsepower and speed into torque in lb-ft and N-m for the motor formula family.
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Motor Soft-Starter Current Calculator
Estimate across-line starting current, soft-start current limit, reduction, kVA, and comparison from entered motor values.
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Motor Service Factor Load Calculator
Compare measured motor current with a service-factor current reference, utilization, margin, and nameplate percentage.
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Motor Multi-Speed Current Calculator
Estimate per-speed current from entered horsepower, efficiency, power factor, voltage, and phase values.
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Motor Horsepower From Torque Calculator
Convert entered torque and speed into mechanical horsepower and kilowatts for the motor formula family.
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Motor Feeder Voltage Drop Calculator
Estimate feeder running and starting-event voltage drop from aggregate current and a starting-motor scenario.
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Motor Feeder Calculator
Estimate multi-motor feeder current from entered motor currents and a largest-motor factor for qualified review.
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Motor Control Circuit Calculator
Estimate control-circuit VA, current, reserve requirement, transformer margin, and utilization from entered device loads.
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Motor Circuit Conductor Size Calculator
Estimate an entered motor conductor ampacity reference and compare it with selected ampacity for qualified review.
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Motor Branch Voltage Drop Calculator
Estimate running and starting voltage drop, terminal voltage, and approximate loss from entered motor branch-circuit values.
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Motor Branch Circuit Protection Calculator
Estimate an entered motor protection reference and compare it with a selected rating for qualified review.
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Microinverter Count Calculator
Estimate unit count, AC/DC capacity, DC/AC ratio, and branch-group count from entered module and microinverter data.
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Meter Burden Voltage Calculator
Estimate meter burden voltage and resistive burden power from entered input resistance and test current for instrument-loading review.
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Megohm Test Trend Calculator
Estimate megohm change, percent change, daily change, and drop margin from comparable readings across known days.
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Measurement Uncertainty Calculator
Estimate combined and relative uncertainty from three documented independent components.
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Lockout Tagout Sequence Calculator
Organize entered lockout/tagout sequence records and energy-source identifiers for qualified review.
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Limited Approach Boundary Calculator
Compare recorded limited-boundary distances in a review worksheet without deriving a required boundary or entry decision.
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Lighting Uniformity Calculator
Estimate illuminance uniformity ratios from minimum, average, and maximum readings on the same measurement basis.
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Lighting Controls Savings Calculator
Estimate annual energy and cost savings from baseline wattage, controlled wattage, operating schedule, and electricity rate.
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