Electrical Calculators

Calculate wiring sizes, current loads, voltage drop, and power factors for **safe and efficient** electrical design.

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40 Essential Electrical Calculators

Voltage Drop

Calculate voltage loss in circuits.

Wire Size

Determine proper wire gauge for load.

Ohm's Law

Find voltage, current, resistance, or power.

Power Factor

Calculate true, apparent, and reactive power.

Load Balance

Distribute electrical loads across circuits.

Transformer Size

Estimate transformer capacity for load demand.

Motor Load

Calculate current and torque for motors.

Power Consumption

Estimate energy usage and cost.

Lighting Load

Determine total lighting power requirements.

3-Phase Load

Calculate 3-phase system loads.

Cable Sizing

Choose cables based on current and distance.

Breaker Size

Select the right circuit breaker rating.

Energy Cost

Estimate electricity cost per appliance or system.

Neutral Current

Calculate neutral current in multi-phase systems.

Conduit Fill

Calculate maximum wires in conduit.

Grounding Electrode

Size grounding conductors per NEC.

Short Circuit Current

Calculate fault current levels.

Capacitor Sizing

Size power factor correction capacitors.

Harmonic Distortion

Calculate THD in power systems.

Solar Panel Output

Estimate PV system energy production.

Battery Capacity

Calculate backup battery runtime.

Inverter Sizing

Size inverter for load and surge.

Arc Flash Energy

Calculate incident energy per IEEE 1584.

Fault Current

Determine available fault current.

Parallel Conductors

Size conductors in parallel.

Voltage Regulation

Calculate % voltage regulation.

Reactance

Inductive and capacitive reactance.

Impedance

Calculate total circuit impedance.

Resonance Frequency

Find resonant frequency in RLC circuits.

Skin Effect

AC resistance increase at high frequency.

Ground Resistance

Measure soil resistivity and grounding.

Lightning Protection

Design surge protection zones.

EMF Calculation

Electromotive force in generators.

Synchronous Speed

Calculate motor RPM from frequency.

Slip Calculation

Induction motor slip percentage.

Torque Calculator

Mechanical torque from power and RPM.

Efficiency Calculator

Electrical to mechanical efficiency.

kVA to kW

Convert apparent to real power.

Phase Conversion

Single to three-phase power conversion.

Cable Derating

Apply temperature and bundling factors.

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