All Electrical Calculators
Fast, accurate browser-based calculators for wire sizing, voltage drop, cable calculations, and engineering math. No install, no signup.
Wiring & Cross-section
1 calculator in this group
Power System Analysis
2 calculators in this group
Voltage Drop Calculator (IEC 60364 & NEC NFPA 70)
Voltage drop calculator with a single page covering BOTH IEC 60364-5-52 Annex G (metric mm² cables, A/B limits) and NEC NFPA 70 Chapter 9 Tables 8–9 (AWG / kcmil, 3% branch / 5% feeder FPNs). Copper / aluminium, 1-phase / 3-phase / DC, temperature correction, parallel conductors, conduit material (NEC), reactance X and ampacity cross-check.
Symmetrical Components Calculator
Compute positive, negative and zero sequence components from three-phase currents or voltages (balanced or unbalanced), then reconstruct phase phasors back.
Engineering Math
1 calculator in this group
Cable Installation
3 calculators in this group
Cable Sizing Calculator
Estimate the minimum cable cross-section for LV installations using load current, installation method, number of circuits, ambient temperature and voltage drop constraints.
Cable Pulling Tension & Sidewall Pressure Calculator (AEIC CG5)
Cable pulling tension calculator and sidewall pressure (SWBP) solver using the AEIC CG5 (2nd Ed.) pulling-guide method. Build the duct run section by section, walk the tension through, calculate SWBP at every bend, and check the pull in both directions.
Cable Derating & Sizing Calculator (IEC 60364-5-52)
Full IEC 60364-5-52 cable derating calculator: 12 reference installation methods, ambient/ground temperature correction, soil resistivity, grouping factors for trays/bunched/buried ducts, Annex D curve-fit base ampacities (PVC / XLPE, Cu / Al, 2 or 3 loaded), harmonic derating per Annex E, smallest mm² cross-section and nearest AWG equivalent, with the full factor chain and printable copy.