All Weight Units

How to Convert Weight Units?

Weight conversion is crucial for cooking, shipping, fitness tracking, and scientific applications. This converter uses precise conversion factors to translate between metric and imperial weight units. Enter any weight value, select the source unit, and instantly see the equivalent in all other weight units including kilograms, pounds, ounces, and more.

Units

Kilogram (kg)

The kilogram is the base unit of mass in the SI system. It was originally defined as the mass of one liter of water at 4 degrees Celsius. Today, it's defined using Planck's constant. Kilograms are the standard unit for body weight, food products, and most commercial goods worldwide.

Pound (lb)

The pound is the primary unit of weight in the US customary and British imperial systems. One pound equals exactly 0.45359237 kilograms or 16 ounces. It's commonly used for body weight, food packaging, and shipping in the United States.

Ounce (oz)

The ounce is a unit of weight equal to 1/16 of a pound or approximately 28.35 grams. It's commonly used in the US for food portions, postal weights, and precious metals. Note that fluid ounces measure volume, not weight.

Gram (g)

The gram is a metric unit equal to 1/1000 of a kilogram. It's used worldwide for measuring small quantities in cooking, nutrition labels, jewelry, and scientific applications. One gram is roughly the weight of a paperclip.

Stone (st)

The stone is a British unit of weight equal to 14 pounds or approximately 6.35 kilograms. It's primarily used in the UK and Ireland for expressing body weight. For example, a person might say they weigh '10 stone 5 pounds'.

Common Weight Conversions