Electrical

Ohm's Law Calculator

Calculate voltage, current, or resistance using Ohm's Law. The mathematical equation representing Ohm's Law is:

Formula:

V = I * R

Formula Breakdown:

This equation allows you to calculate any one of the three variables if you know the values of the other two. Here's a breakdown of how the equation can be used in different scenarios:

Power Calculator

Calculate power using voltage and current. The power formula shows that power is equal to the product of voltage and current. This formula is applicable to both DC (direct current) and AC (alternating current) circuits.

Formula:

P = V * I

Formula Breakdown:

Resistor Value Calculator

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Equivalent Resistance in a Parallel Circuit

The equivalent resistance (Req) in a parallel circuit is the reciprocal of the sum of the reciprocals of the individual resistances (R1, R2, R3, ..., Rn) of all components connected in parallel.

Formula:

1 / Req = 1 / R1 + 1 / R2 + 1 / R3 + ... + 1 / Rn

Formula Breakdown:

In a parallel circuit, each component has the same voltage applied across it, and the total current is the sum of the currents through each component. The reciprocal of the equivalent resistance is calculated by adding the reciprocals of the individual resistances, representing how current divides and flows through parallel branches.

The formula 1 / Req = 1 / R1 + 1 / R2 + 1 / R3 + ... + 1 / Rn mathematically expresses this concept, where each 1 / Ri is the reciprocal of the resistance of a specific component in the parallel circuit.


Equivalent Resistance in a Series Circuit

The equivalent resistance (Req) in a series circuit is the sum of the individual resistances (R1, R2, R3, ..., Rn) of all components connected in series.

Formula:

Req = R1 + R2 + R3 + ... + Rn

Formula Breakdown:

In a series circuit, the current flows through each component one after another, so the total resistance experienced by the current is the sum of all resistances in the circuit. This can be understood by examining how resistances add up in a linear path, contributing to the overall resistance encountered by the current.

The formula Req = R1 + R2 + R3 + ... + Rn mathematically represents this concept, where each Ri is the resistance of a specific component in the series.


Voltage Drop Calculator - Single-Phase

Calculate the voltage drop in a single-phase electrical circuit.

Formula:

Voltage Drop = (2 * Current * Length * Resistance) / (1000 * Conductor Size)

Formula Breakdown:




Wire AWG Conversion Calculator