Advanced Electrical Calculator

Complete electrical engineering calculator with circuit visualization and unit conversions

Ohm's Law
Power Calculations
Circuit Analysis
Unit Converter

Voltage

V = I × R

Current

I = V ÷ R

Resistance

R = V ÷ I

Power

P = V × I

Input Parameters

Results

Calculated Value
--
Unit
Alternative Calculation
--
Unit

Circuit Diagram

Ohm's Law Formulas

Voltage: V = I × R
Current: I = V ÷ R
Resistance: R = V ÷ I
Power (Voltage): P = V × I
Power (Resistance): P = I² × R
Power (Voltage²): P = V² ÷ R

Power Calculations

Power Analysis

Real Power (P)
--
Watts
Apparent Power (S)
--
VA
Reactive Power (Q)
--
VAR
Input Power
--
Watts

Power Formulas

Real Power: P = V × I × PF

Apparent Power: S = V × I

Reactive Power: Q = √(S² - P²)

Input Power: P_in = P ÷ (η/100)

Series/Parallel Resistors

Circuit Analysis Results

Total Resistance
--
Ω
Total Current
--
A
Total Power
--
W
Voltage Drop
--
V

Circuit Configuration

Unit Converter

Unit Symbol Multiplier

Electrical Engineering Formulas Reference

Basic Formulas

  • Ohm's Law: V = I × R
  • Power: P = V × I
  • Energy: E = P × t
  • Charge: Q = I × t
  • Resistance: R = ρ × (L/A)

Circuit Formulas

  • Series Resistors: Rtotal = ΣRi
  • Parallel Resistors: 1/Rtotal = Σ(1/Ri)
  • Voltage Divider: Vout = Vin × (R2/(R1+R2))
  • Current Divider: I1 = Itotal × (Rtotal/R1)

Power Formulas

  • AC Power: P = V × I × PF
  • Three-Phase: P = √3 × VL × IL × PF
  • Reactive Power: Q = V × I × sin(φ)
  • Apparent Power: S = V × I
  • Power Factor: PF = cos(φ)