Observed arrival · 2026-09-16
IngCalc, an Engineering Calculator Library With Receipts
A free collection of 57 browser-based calculators covering electrical, HVAC, mechanical, solar, and battery work.
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ƒJS
Field notes
The library groups 57 calculators into Electrical, HVAC and Climate, Mechanical Engineering, and Solar, Energy and Batteries sections. Listed examples range from metric and AWG wire sizing to round-duct friction-loss calculations, bolt torque and preload, battery runtime with depth of discharge, and charge-controller sizing. IngCalc says its calculators run in the browser and documents formulas, assumptions, limitations, and named reference sources such as NEC, ASHRAE, ISO, and NREL.
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○OpenPublic substance visible
†AdsAdvertising visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue