Bulk Order & Shipping Calculator is a free, open-source, single-file web tool for small e-commerce sellers. Instantly calculate bulk order subtotals, package weights, and tiered shipping costs. Features: - Subtotal from price x quantity - Package weight estimate - Customizable shipping slabs - Multi-currency: INR, USD, EUR, GBP - 100% offline, zero dependencies Built by Palum Dhara (palumdhara.in), a Kangra tea brand that got tired of the math by hand.