OHMs Law Calc
iOS Universel / Références
A precision electrical calculator for electricians, engineers, students, and AV/lighting pros — built for iPhone, iPad, and Mac.
Single-Phase Calculator
Enter any two of Volts, Amps, Watts, or Ohms and the app solves the other two instantly. Results are displayed on a classic Ohm's Law pie chart with a live readout hub, so you can see the relationship between values at a glance.
Three-Phase Calculator
A spreadsheet-style grid for balanced or unbalanced three-phase loads. Enter per-leg voltage, current, or power and the app fills in the rest, including line and phase totals. Toggle between Delta and Wye/Star configurations — the math adjusts automatically.
Power Factor
A collapsible PF panel on both screens lets you apply any power factor from 0 to 1. Real Power, Apparent Power (VA), and Reactive Power (VAR) are calculated and clearly labeled. Your PF setting is remembered between sessions.
NEC-Compliant Breaker Sizing
Full Load Amps (FLA) and recommended breaker sizes are calculated automatically using NEC sizing rules, so you can spec circuits with confidence.
Visualization Mode
Tap Visualize from any calculation to see five live, interactive diagrams powered by your current values:
Delta wiring topology
Wye / Star wiring topology
Bus-bar distribution view
Phasor diagram with power triangle (P, Q, S, and PF angle)
Dashboard — an all-in-one overview combining schematic, per-leg cards, and KPI readouts
Print & Share
Send any visualization straight to AirPrint as a clean, light-mode page — handy for job folders, submittals, or classroom handouts.
Universal & Responsive
One app, every Apple device. Optimized layouts for iPhone portrait, iPhone landscape, iPad split-view, and Mac Catalyst, with full dark-mode support and high-contrast yellow input cells for readability on the job site.
Keyboard & Input Polish
Tap-to-select-all on any field, a Done bar above the keyboard, and auto-scroll that keeps the focused field visible while you type.
Quoi de neuf dans la dernière version ?
What's New in 3.0
A full ground-up refresh of OHM's Law Calculator, rebuilt for modern iPhone, iPad, and Mac.
Redesigned single-phase calculator — enlarged Ohm's Law pie chart with a clean inner hub, four pinned input fields, and live recalculation as you type.
Spreadsheet-style three-phase grid — enter per-leg values in a clear tabular layout, with totals that fit on screen in both portrait and landscape.
Delta and Wye topology toggle — switch between three-phase configurations with the math handled correctly for each.
Power Factor support — collapsible PF disclosure on both single- and three-phase screens, with the Watts row labeled with the active PF (e.g. "Real Power (PF @ 0.85)"). Your PF setting persists across launches.
Visualization mode — five interactive diagrams accessible from any calculation: Delta, Wye/Star, Bus-bar, Phasor (power triangle), and a full Dashboard view.
Print from visualization — send any diagram straight to AirPrint, optimized for light-mode output.
NEC-compliant breaker sizing — automatic, code-aware breaker recommendations.
Truly universal layout — side-by-side landscape views, responsive iPad and Mac Catalyst scaling, and rotation through every orientation.
Keyboard polish — Done bar, tap-to-select-all, and the focused field auto-scrolls above the keyboard.
Dark mode throughout, with high-contrast yellow input cells for readability in the field.
