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Electrical Engineering Calculators & Tools

Electrical engineering calculators for voltage drop, wire sizing, motor selection, and power analysis. Design efficient electrical systems with proper conductor sizing.

Electrical Engineering Calculators

Explore our collection of 5 electrical engineering calculators. Each tool includes detailed documentation, formulas, and interactive visualizations.

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Voltage Drop Calculator
Calculate voltage drop and power loss in electrical circuits. Recommend optimal AWG wire sizes for DC, single-phase, and three-phase systems.
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Electric Motor Sizing Calculator
Calculate electric motor power requirements, torque, and recommended motor size. Supports load analysis and standard motor selection.
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Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two known values to solve for the remaining electrical properties with animated circuit visualization.
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Wire Size Calculator
Determine correct wire size based on current load and NEC ampacity tables. Applies temperature correction, conduit fill derating, and continuous load factors.
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Power Factor Calculator
Calculate power factor from electrical measurements or determine capacitor sizing for power factor correction. Analyze real, reactive, and apparent power with 3D power triangle visualization.

Electrical Engineering Glossary

Key terms and definitions for electrical engineering. Understanding these concepts will help you use our calculators more effectively.

Voltage Drop
The reduction in voltage along a conductor due to its electrical resistance. Occurs as current flows through wires and is proportional to wire length and current magnitude.
AWG (American Wire Gauge)
A standardized wire gauge system used primarily in North America. Lower AWG numbers indicate thicker wires with lower resistance and higher current capacity.
Conductor Resistance
The opposition to current flow in an electrical conductor, measured in ohms. Depends on material, length, cross-sectional area, and temperature.
Single-Phase Power
An AC power distribution method using two wires (hot and neutral). Common in residential applications and smaller commercial loads.
Three-Phase Power
An AC power distribution method using three conductors carrying currents 120° out of phase. More efficient for large loads and motors.
Motor Torque
The rotational force produced by a motor shaft, calculated as T = P/ω where P is power and ω is angular velocity. Measured in N·m or lb·ft. Determines acceleration capability and load driving ability.
Motor Efficiency
The ratio of mechanical output power to electrical input power, expressed as a percentage. Losses include copper (I²R), iron (core), mechanical (friction), and stray load losses.
Motor Power Factor
The ratio of real power (kW) to apparent power (kVA) in an AC motor. Indicates how effectively the motor uses electrical power. Low power factor increases current draw and electrical losses.
Ohm's Law
The fundamental relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = I × R. This law states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance.
Electrical Resistance
The opposition to current flow in an electrical circuit, measured in ohms (Ω). Resistance depends on material resistivity (ρ), conductor length (L), and cross-sectional area (A): R = ρL/A.
Electrical Current
The flow of electric charge through a conductor, measured in amperes (A). One ampere equals one coulomb of charge passing a point per second. Current flows from positive to negative (conventional) or negative to positive (electron flow).
Power Dissipation
The rate at which electrical energy is converted to heat in a circuit, measured in watts (W). Calculated as P = V × I, P = I²R, or P = V²/R. Power dissipation determines thermal management requirements.
Ampacity
The maximum current a conductor can carry continuously without exceeding its temperature rating. Ampacity depends on conductor size, insulation type, installation method, and ambient conditions. Defined in NEC Table 310.16.
Continuous Load
A load where the maximum current is expected to continue for 3 hours or more. Per NEC 210.20, conductors for continuous loads must be sized at 125% of the load current to account for sustained heat buildup.
Conductor Temperature Rating
The maximum continuous operating temperature of a conductor's insulation, typically 60°C, 75°C, or 90°C. Higher ratings allow more current, but terminations (breakers, outlets) often limit usable ampacity to 75°C values.
Conduit Fill
The number of conductors installed in a raceway, which affects ampacity derating. More conductors mean less heat dissipation per wire. NEC Table 310.15(C)(1) specifies adjustment factors based on conductor count.

Frequently Asked Questions

What are electrical engineering calculators?

Electrical Engineering calculators are online tools that help engineers and students solve common electrical engineering problems. They provide quick, accurate calculations for design, analysis, and verification tasks.

Are these electrical calculators free to use?

Yes, all electrical engineering calculators on Simulyzers are completely free to use. No registration or account is required.

How accurate are these electrical engineering tools?

Our calculators use industry-standard formulas and methods. However, they are intended for preliminary estimates and educational purposes. Always verify critical calculations with a qualified professional engineer.

Can I use these calculators on mobile devices?

Yes, all our electrical engineering calculators are fully responsive and work on smartphones, tablets, and desktop computers.

Other Categories

🏗️ Structural Engineering⚙️ Mechanical Engineering🏭 Manufacturing & Production💧 Fluid Mechanics🌡️ Heat Transfer & Thermal

About Electrical Engineering Tools

Our electrical engineering calculators are designed for practicing engineers, students, and technical professionals. Each calculator uses established engineering formulas with clear documentation of assumptions and limitations.

How to Use These Calculators

  • Enter your input values in the form fields
  • Select appropriate units (metric or imperial)
  • Click Calculate to see results
  • Review any warnings or notes about assumptions
  • Use the 3D visualization to verify your understanding
  • Share calculations by copying the URL

Disclaimer

These calculators are for preliminary estimates and educational purposes only. Results should be verified by a qualified professional engineer before use in actual engineering applications. See our full disclaimer for more information.