⚡ Open Calculators
⚡ Built by an Electrician · 1 Year on Site

Every electrical tool
you actually need.

Calculators, wiring guides, learning paths, load analysis, and job billing — for students, engineers, apprentices, and trade workers. One platform, built from the job up.

Start Calculating →Browse Guides
8Calculators
15Wiring Guides
9Courses
FreeCore Tools

Platform

Everything the job demands.

Not a textbook. Not a single-purpose app. A full platform built from real, on-site work.

⚡
Electrical Calculators
Ohm's law, voltage drop, cable sizing, power factor, LED resistor, series/parallel resistance — instant results with unit explanations.
🔌
Wiring Connection Guides
Step-by-step guides for domestic, commercial, and industrial wiring. Colour codes, termination diagrams, and safety callouts included.
📐
Load Analysis & Cable Sizing
Calculate current demand, size circuits correctly, and check for overloads before you wire. Supports single-phase and three-phase.
🎓
Structured Learning Paths
From basic circuit theory to advanced protection coordination. Built for students, apprentices, and engineers refreshing their knowledge.
🏗️
Project Tools & Cost Estimation
Map your installation, create material takeoffs, and estimate costs with live pricing data. From single rooms to full commercial fits.
💼
Job Billing & Client Portal
Quote jobs, log hours, raise invoices, and share client-facing project reports — without leaving the platform.

Who it's for

From classroom to
construction site.

One tool that grows with you — from your first circuit diagram to a documented job design. Pick where you are.

OHM'S LAW · SERIES + PARALLEL12VAR1 220ΩR2R3VV = I × RP = V × I1/Rₚ = 1/R2 + 1/R3
Students
Understand it — then prove it in the exam.
  • →Work Ohm's law, power, series/parallel and Kirchhoff from first principles — every calculator shows the formula it used, so you learn the method, not just the answer.
  • →Follow structured courses from fundamentals to three-phase and cable sizing, each with worked examples and self-marking quizzes.
  • →Check your homework instantly: enter your values and compare against the step-by-step working.
  • →Practise with the same figures and limits used on real installations, so exam answers match site reality.
Start with fundamentals →Open the calculators

Accuracy & method

Calculations you can check.

A professional tool earns trust by showing its working — not by hiding it. Here is exactly how ElectraCore treats every result.

Standard formulas, shown
Ohm's law, P = V·I, resistive networks, and cross-sectional sizing from conductor resistivity. Every calculator displays the equation it used — nothing is hidden or silently approximated.
Limits flagged, not assumed
Voltage-drop results highlight the common 3% guideline. Always confirm the exact limit for your circuit type and standard — BS 7671, NEC, or the regulations that apply where you work.
An aid, not a substitute
ElectraCore supports your working; it doesn't replace a qualified design or inspection. Verify every result against the wiring regulations for your installation before you rely on it.

Free to use. No account needed.

Every calculator and guide is open access. Create an account to save your calculations, track learning progress, and unlock Pro tools.

Open CalculatorsStart Learning

Pricing

Start free. Go Pro when it pays.

Core calculators and guides are free, forever.

Free
$0
The essentials, always available.
  • Ohm's law calculator
  • Basic wiring guides
  • Series/parallel resistance
  • Community access
Get Started
Pro
$15/mo
For serious students and working electricians.
  • All 8 calculators
  • Full guide library (15 guides)
  • 9 structured courses
  • Calculation history & save
  • PDF export
Start Pro
Business
$45/mo
Teams, firms, and training providers.
  • Everything in Pro
  • Job billing & invoicing
  • Client portal & reports
  • Team accounts (up to 10)
  • Priority support
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