什么是 TradeCalc？
TradeCalc is a free library of 92 construction and home improvement calculators — concrete, electrical (NEC 2023 compliant), HVAC, plumbing, framing, and more. Built for contractors and DIY builders who want instant answers without signups, popups, or ads blocking the tool. Includes the new 2026 stuff most sites miss: EV charger wire sizing, heat pump sizing, kitchen/bathroom remodel costs with current prices, and labor burden for contractors.
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