Plan circuits, install outlets and switches safely, understand code limits, and hire pros for panel work.
Careful DIYers learning permitted electrical tasks
Turn off correct breaker
Wire a switch or outlet
Use a voltage tester
Identify jobs requiring electrician
Start with the closest real-world task, then use the mapped tools inside each guide.
Residential electrical wiring guide with wire gauge sizing, circuit load calculations, breaker panel planning, and code-compliant installation steps.
Free step-by-step smart thermostat installation setup for homeowners. Plan smart thermostat installation with calculators and checklists covering check hvac.
Free step-by-step home office tech setup for remote workers. Plan home office tech with calculators and checklists covering budget desk tech stack, prioritize.
Filter and categorize specialized tools in this niche field by functionality and complexity.
Reproduce one source-labelled electrical load schedule from connected volt-amperes and explicitly copied line multipliers—without choosing code factors or sizing a service, feeder, conductor or breaker.
Audit one documented protection-selection record from source-labelled current components, an explicit multiplier, an already selected device rating, and a documented conductor ampacity—without choosing a breaker or declaring compliance.
Calculate percentages in seven modes with visible formulas, strict input validation, signed percentage change, and symmetric percentage difference.
Audit voltage-drop arithmetic for one source-selected candidate conductor using documented impedance, path and units—without selecting AWG, ampacity, an allowable drop or code compliance.
Audit one documented series circuit path from source-labelled segment currents, lengths, path multipliers and effective impedances—without assuming copper, choosing wire size or applying a pass/fail threshold.
Convert square meters to square feet. Area conversion for real estate and flooring. Free unit converter with precise, instant browser-based conversions — no
Estimate appliance kWh and cost by day, week, average month, current calendar month, and year, with an optional regional CO₂ factor.
Compare documented annual electricity use for two appliances using one local rate, entered upgrade cost, and explicit planning horizon.
Convert TOML 1.1 to JSON with explicit policies for large integers, precise date/time tokens and non-finite values. Review configuration locally.
Analyze password strength. Entropy, crack time estimates, character analysis, common password check. Get improvement tips.
Validate IPv4 and IPv6 addresses. Check format. For networking and security. Free developer utility that runs locally in your browser — fast, private, and no
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