The primary unit for body weight and grocery items in the US.

The metric system is the global standard for scientific and commercial use. It is decimal-based, making it easy to convert between units by moving the decimal point.

Also known as specific weight, it measures the weight per unit volume of a material (e.g.,

The standard SI unit for mass. It is used for body weight, groceries, and shipping.

For business owners, selecting the correct weight unit is critical for shipping calculations. Platforms like WooCommerce and Shopify allow users to set global weight units (kg, lb, oz, g) to automate shipping rates and labels.