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Free Engineering Calculators — GorkyCAD Pro
Free engineering calculators for electrical designers. Client-side computation — your data never leaves your browser.
💡 EN 12464-1
Lighting Calculator
Calculate the number of luminaires, luminous flux and specific power per SP 52.13330 / IS 3646 / EN 12464-1.
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⚡ IEC 60364
Voltage Drop Calculator
Calculate voltage drop in a cable line. Copper/aluminum, single-phase/three-phase. Instant assessment per standards.
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🔌 IEC 60898
Circuit Breaker Selector
Select breaker rating and characteristic by load type and power. Cable cross-section recommendation included.
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All calculators run client-side (JavaScript). Your data is never sent to a server or stored. Calculations are for reference — for critical projects, use GorkyCAD Pro with its deterministic calculation engine.