Calculadora Elétrica NBR 5410

Complete electrical calculator for electricians, technicians, and engineers — calibrated to the Brazilian standard NBR 5410, with cable sizing, voltage drop calculation, circuit breakers, and calculation report in PDF.

Tired of spreadsheets that break or English apps with incorrect voltages? Calc Elétrica was built from scratch for the reality of Brazil: 127/220 V voltages, cross-sections in mm², NBR 5410 installation methods, and correct voltage drop limits — 4%, 5%, and 7%.

▶ CONDUCTOR SIZING ACCORDING TO THE 6 CRITERIA OF NBR 5410
No other electrical calculation app does this. The cable cross-section is calculated by verifying ALL the criteria of the standard simultaneously:
• Minimum cross-section (Table 47)
• Current carrying capacity (Iz)
• Voltage drop
• Overload protection
• Short-circuit capacity
• Shock protection (PE conductor)

The app indicates which criterion governed the choice — technical transparency that no spreadsheet offers.

▶ ELECTRICAL CALCULATION TOOLS INCLUDED
• Cable sizing (copper/aluminum, PVC/EPR, all installation methods)
• Voltage drop with verification of regulatory limits
• Circuit breaker and protection — with mandatory RCD warning per environment
• Conduit by occupancy rate (53% / 31% / 40%)
• Electric motor — nominal current, starting current, C/D curve
• Power factor and capacitor bank (according to PRODIST)
• Ohm's law and active/reactive/apparent power

▶ CALCULATION MEMORIAL IN PDF — EXCLUSIVE IN BRAZIL
Generate a professional document with the regulatory justification for each result, project data, method used, and a field for the technical manager's signature. Send it to the client via WhatsApp or attach it to your ART (Technical Responsibility Certificate). No other Brazilian electrical installation app offers a calculation memorial — this is our differentiator.

▶ MADE FOR WORK ON CONSTRUCTION SITES
• 100% offline — works without internet, on any construction site
• Calculation history organized by project
• Light and dark theme
• Fast interface, no crashes

▶ NO SUBSCRIPTION, NO MONTHLY FEE
The Professional version is a one-time payment. Pay once, use forever. No recurring charges, no surprises on your card.

⚠️ The results are project support tools and must be verified by a qualified professional, according to NBR 5410:2004.

Download now and have the standard at your fingertips.