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ElecCalcs is a free, no-signup set of calculators for electrical and building-mechanical coursework. A student enters a load, a run length or a conduit fill, and sees the substitution, the formula and the code clause behind the result, so the working stays visible instead of being hidden in a black box.

Topics include conduit fill, voltage drop, conductor and overcurrent sizing, ampacity correction for temperature and bundling, box fill and box volume, and metric/AWG conversion for IEC-based programmes.

Every result can be exported as a printable PDF for lab reports, and any calculator can be dropped into a course page with a single iframe. No account, no ads, no tracking.

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