Ohms Law Calc.
Wire Size & Voltage Drop
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Description
The electrician's pocket toolkit — 60 electrical calculators and 16 converters with formulas and circuit diagrams for every calculation. Size wire, check voltage drop per NEC, convert kVA to amps, and solve Ohm's Law in seconds.
No subscription. One small purchase unlocks everything, forever, on iPhone, iPad and Mac.
WHY ELECTRICIANS AND STUDENTS LOVE IT
Every calculator shows the formula and circuit diagram — learn while you work
Organized by category: Ohm's Law, Wiring & NEC, Power & Phase, Motors & HP, Transformers, Reactance, Components, Energy & Light
SI and US customary units side by side
Available in 12 languages
WIRING & CODE
Voltage Drop Calculator (NEC/IEEE)
Wire Size Selector (AWG & metric)
OHM'S LAW & POWER
Voltage, Current, Resistance & Power Calculators
Single & Three Phase Power, Current and Power Factor
kVA ⇄ Amps (Single & Three Phase)
Neutral Current (3-Phase Unbalanced Loads)
MOTORS, GENERATORS & TRANSFORMERS
Horsepower Calculators (DC, Single Phase, Three Phase)
Efficiency Calculators (DC, Single & Three Phase)
DC Generator, Transformer Voltage & Current
Star ⇄ Delta Conversions
IMPEDANCE & REACTANCE
Impedance for R, L, C in any series/parallel combination
Inductive & Capacitive Reactance, Resonant Frequency
Characteristic Impedance (Parallel & Coaxial lines)
COMPONENTS & ENERGY
Resistor Color Code
Series/Parallel Resistance, Inductance & Capacitance
Unknown Resistance & Capacitance (Series/Parallel)
Inductor & Capacitor Sizing, Voltage Divider
Energy Cost & Energy Storage Calculators
ILLUMINATION
Luminous Intensity, Luminous Flux & Solid Angle
16 ELECTRICAL CONVERTERS
Field strength, potential, resistance & resistivity, conductance & conductivity, capacitance, inductance, charge & current densities (linear, surface, volume), power — with Ohms, kΩ, Farads, Henrys, kVA, Volts, Weber and more.
Download free and try the core calculators today.
