Freight class plays a big role in determining shipping costs. If you choose the wrong freight class, it can increase your shipping bill. That is why a Freight Class Calculator is so helpful. Freight class also affects how your goods are handled. Higher-class freight may require special care. Some goods are fragile or hazardous. These factors increase the freight class. The Freight Class Calculator considers density first, but you must also think about special handling.. https://freight-classcalculator.com/