Electrical Calculator

Electrical Calculator — 11 Power Tools: Voltage Drop, Ohm's Law, Conduit, Motor, Power Factor, Short-Circuit, Solar PV, Transformer, Lighting & Earthing Electrical Calculator is a complete, offline electrical engineering suite for electricians, electrical engineers, contractors, inspectors, and industrial technicians. Compliant with IEC, NF C 15-100, NEC and IEEE. Eleven specialized calculators in one app — each with an interactive 2D CAD schematic and a full cost estimate. VOLTAGE DROP Single-phase, three-phase and DC circuits. Copper or aluminium, length, section and current. Get voltage drop in volts and percent, residual voltage at the receiver, Joule losses, recommended breaker rating, and compliance status (COMPLIANT / NON-COMPLIANT). OHM'S LAW & POWER Enter any two of voltage, current, resistance and power to solve the circuit instantly, with the formula displayed. CONDUIT FILL Fill ratio per NEC Chap. 9 / IEC 61386 based on conductor count and size. MOTOR SIZING Full-load amperage (FLA), starting inrush, magnetic-thermal breaker rating, and recommended cable size. ENERGY COST Daily, monthly and annual cost from power, run hours and kWh tariff, with carbon footprint estimate. POWER FACTOR / kVAr Required reactive power to raise cos φ to target, capacitor bank recommendation (fixed or automatic stepped), and reactive energy penalty avoidance. SHORT-CIRCUIT (Icc) IEC 60909 three-phase symmetrical method from transformer kVA, impedance Uk%, and upstream cable length and section. Minimum breaking capacity (Icu) recommendation. SOLAR PV Peak power (kWp), MPPT regulator sizing, battery bank capacity for target autonomy, and inverter power. TRANSFORMER Primary (MV) and secondary (LV) rated currents, load check, and apparent power sizing in kVA. LIGHTING LUX Lumen method / zonal cavity formula (EN 12464-1) to determine luminaire count from area and target lux, with layout matrix proposal. EARTHING / GROUNDING Ground rod resistance (IEEE 142 / NF C 15-100) from soil resistivity, rod length and diameter. 2D CAD SCHEMATICS Every calculator generates an interactive vector schematic in real time — single-line board-breaker-cable-load, power triangle, MV/LV coupling, luminaire layout, and more. Dimensions switch to pure white in dark mode for on-site readability. COST ESTIMATION Each calculator includes a cost section: cable or conduit price per metre, protection and accessory costs, labour cost, and a running total in your chosen currency (EUR, USD, GBP, MAD, and more). HISTORY & PDF REPORTS Every calculation is saved locally with timestamp, compliance status and full detail. Instant search and category filters. Secure deletion with confirmation. Export professional PDF technical sheets with KOCHI DIGITAL header, input parameters, engineering results, compliance status, formulas used, and full estimate. Share by SMS, WhatsApp, email, or save to device. BUILT FOR THE FIELD Signal-red high-visibility design, reinforced 1.0–1.5 dp borders for direct sunlight readability, high-contrast dark mode, dynamic five-language support (EN, FR, ES, AR, DE), and instant metric/imperial unit switching. ABOUT KOCHI DIGITAL Kochi Digital builds minimalist, high-performance engineering and construction calculators. Explore more at kochidigital.com. Official website: https://kochidigital.com/apps/electricalcalculator/ Download Electrical Calculator and get compliant, accurate electrical engineering results — anywhere, on any site.