Wattson Pro

Stop guessing. Stop scrolling through ads. Stop paying monthly for a calculator.
Wattson combines 14 precision calculators with an AI assistant that actually runs
them — returning verified, standards-compliant results with code references. Not
chatbot opinions. Verified answers from real calculations. Built for electricians and engineers who work in the field, not the ones designing the app store.
AI ASSISTANT — ANSWERS YOU CAN TRUST
Other apps wrap a chatbot and call it AI. Wattson's AI runs your actual calculators — cable sizing with full derating, voltage drop, breaker coordination — and returns
verified results citing the exact IEC or NEC code section. Not opinions. Math. Use voice input when your hands are full. Speak your question, get a verified answer
— hands-free on the job site.
SMART CABLE SIZING
Full derating factor analysis (Ca, Cg, Ci) per IEC 60364 — installation method, conductor material, insulation type, ambient temperature, and grouped circuits. The most thorough cable sizing calculator in any mobile app.
PRO CALCULATORS
• Smart Cable Sizing — full derating factors
• Voltage Drop — single-phase and 3-phase
• Breaker Sizing — Ib ≤ In ≤ Iz protection coordination
• Motor Calculator — FLC, starting current, protection
• Short Circuit (Ik) — IEC 60909 fault current
• Earth Fault Loop (Zs) — loop impedance testing
• Power Calculator — P, Q, S, cos φ
• Power Factor Correction — capacitor bank sizing
• Wire Sizing — AWG and mm² with capacity tables
• Conduit Fill — IEC fill limits
• Box Fill — NEC 314.16 volume calculations
• Dwelling Load — NEC Article 220 residential loads
FREE — NO CATCH
• Ohm's Law — V, I, R, P solver
• Unit Converter — AWG, kW, HP, °C
• Wiring Color Codes — IEC 60446 standards
• IP Rating Decoder — IEC 60529
• Wiring Diagrams — 12 interactive circuit diagrams
• Full AI assistant with voice input
WIRING DIAGRAMS
12 professional interactive circuit diagrams — 6 for IEC and 6 for NEC. Color-coded wires per IEC 60446 and NFPA 70, component labels, installation notes, and regulatory references. Pinch to zoom, tap to explore. No other calculator app has these.
DUAL STANDARD SUPPORT
Switch between IEC 60364 and NEC/NFPA 70 with one tap. Every calculation cites the applicable code section. Whether you wire to European or American standards — one
app covers both.
PROFESSIONAL PDF EXPORT
Generate shareable reports from any calculator or AI conversation. Hand them to inspectors, clients, or keep for your records.
8 LANGUAGES
English, German, French, Spanish, Italian, Polish, Portuguese, and Croatian. The AI responds in your chosen language.
NO ADS. NO SUBSCRIPTIONS. NO $10/MONTH "AI TAX."
Download free with 5 calculators, the full AI assistant, wiring diagrams, and voice input. Unlock all Pro calculators with a single purchase. No recurring fees. No ads. No paywalled NEC editions. Ever.
WHY ELECTRICIANS SWITCH TO WATTSON
→ AI that runs real calculations, not a chatbot wrapper
→ Voice input — hands-free on the job site
→ Full derating factors other apps skip entirely
→ IEC and NEC in one app — not two separate purchases
→ Modern interface that doesn't look like 2012
→ PDF reports for inspectors and documentation
→ No ads interrupting your workflow
→ No subscription draining your wallet
→ 8 languages, dark mode, works offline
Wattson. The electrical toolbox professionals trust.