Electrical Tools & Calculators
All tools are free, work offline, and based on current NEC requirements.
Check voltage drop on any circuit run. Single-phase, three-phase, and DC with copper or aluminum conductors.
Use Tool →Determine minimum conductor size per NEC 310.16 ampacity tables with automatic voltage drop verification.
Use Tool →Calculate conduit fill percentage per NEC Chapter 9 tables. Supports EMT, IMC, RMC, PVC, and FMC with multiple wire types.
Use Tool →Calculate required box volume in cubic inches per NEC 314.16. Counts conductors, devices, clamps, and equipment grounds.
Use Tool →Enter any two of voltage, current, resistance, or power and instantly calculate the rest. Quick reference for the field.
Use Tool →Single-family dwelling load calculation per NEC Article 220. Standard method (Part III) and optional method (Part IV).
Use Tool →Size standby generators with load management calculations and Generac model recommendations.
Use Tool →Complete circuit design from panel to last outlet. Combines feeder and branch voltage drop, wire sizing, derating, and EGC in one calculation.
Use Tool →Calculate bending multipliers, shrink, and distances for offsets, saddles, kicks, and 90-degree bends. EMT, IMC, and RMC.
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