Engineering Calculators

Welcome to our Engineering Calculators Section

Box Fill Calculator

Free NEC 314.16 box fill calculator. Counts conductors at their own gauge plus clamps, device yokes, grounds and terminal blocks, then gives required cubic inches and the smallest legal box.

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Tank Volume Calculator

Free tank volume calculator for horizontal and vertical cylinders, ovals, capsules, spheres and cone-bottom tanks. Total capacity and partial fill in gallons, litres, cubic feet and barrels, with a gallons-per-inch chart.

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Conduit Fill Calculator

Free conduit fill calculator with NEC Chapter 9 fill charts for EMT, PVC, IMC and RMC.

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Resistor Voltage Drop Calculator

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RPM to Speed Calculator

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Torque Calculator

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Transformer Load Calculator

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Motor Current Calculator

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Short Circuit Current Calculator

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Generator Sizing Calculator

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Energy Consumption Calculator

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kW to kVA Calculator

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Battery Backup Calculator

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Cable Size Calculator

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Power Factor Correction Calculator

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Ohm’s Law Calculator

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AWG to mm² Converter

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Resistor Color Code Calculator

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Wire Gauge Calculator

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Voltage Drop calculator

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