Ohms Law Calc.
Wire Size & Voltage Drop
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
New: filter 60+ calculators by category — Ohm's Law, Wiring & NEC, Motors, Transformers & more. One small purchase unlocks everything. No subscription, ever.
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.
Ratings & Reviews
• Find calculators faster — new category chips group all 60+ calculators by purpose
• Bug fixes and improvements
The developer, V PUGAZHENTHI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- V PUGAZHENTHI
- Size
- 68.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 8 more
- English, Dutch, French, German, Italian, Polish, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Ohms Law Calc. ₪14.90
- Copyright
- © All Rights Reserved
