Weight Conversion Calculator: Convert Weight Units Quickly

Welcome to our weight converters, perfect for anyone who needs to convert between various weight units, including those used in trading, shipping, and other industries.

Our weight converter is an essential resource for anyone involved in trading and shipping, where precise measurements can make all the difference. We offer a wide range of weight units, from the standard ounces and pounds to the more specialized grains, stones, and even tons. So whether you're buying and selling goods by weight or calculating the cargo weight for shipping, our converter makes it easy to switch between units and get accurate results.

But our tools are also meant to help cooks and bakers to switch between metric and imperial units, while scientists can use them for precise measurements in their experiments. And with our helpful tables and lists, you can quickly find the most popular weight conversions and even convert more specific numbers with decimals.

So whether you're involved in trading and shipping, cooking and baking, or any other industry that requires precise weight measurements, our website is the perfect resource for all your weight conversion needs.

Convert Weights From

Convert from kilograms Convert from grams Convert from milligrams Convert from pounds Convert from ounces Convert from tons Convert from stones Convert from grains Convert from pennyweights Convert from long-tons Convert from metric tons Convert from troy ounces Convert from troy pounds

Common Weight Conversions Table

To Convert From	To Convert To	Conversion Factor
Grams	Ounces	0.035274
Grams	Pounds	0.002205
Ounces	Grams	28.3495
Pounds	Kilograms	0.453592
Pounds	Ounces	16
Kilograms	Pounds	2.20462
Metric Tons	Pounds	2204.62
Tons	Pounds	2000
Troy Ounces	Pounds	0.822857
Troy Pounds	Ounces	12

Grains

📖 A grain is a unit of mass that is equal to 1/7000th of a pound or 64.8 milligrams. It is commonly used to measure the weight of bullets, gunpowder, and precious stones.

💡 Did you know that the weight of a single grain of wheat can vary from 10 to 60 milligrams depending on the variety and growing conditions? That's why grains have been used as a unit of measurement for thousands of years!

Grams

📖 A gram is a metric unit of mass that is equal to one-thousandth of a kilogram or approximately the weight of a small paper clip. It is commonly used to measure the weight of food, drugs, and small objects.

💡 The word "gram" comes from the Greek word "gramma," which means "something written" or "letter." This is because the gram was originally defined as the weight of one cubic centimeter of water, which was used to calibrate laboratory scales.

Kilograms

📖 A kilogram is a metric unit of mass that is equal to 1000 grams or approximately the weight of a liter of water. It is commonly used to measure the weight of people, animals, and large objects.

💡 The kilogram is the only SI base unit that is still defined by a physical artifact, a platinum-iridium cylinder called the International Prototype of the Kilogram. However, this definition is set to change in 2019 with the redefinition of the kilogram based on fundamental constants.

Milligrams

📖 A milligram is a metric unit of mass that is equal to one-thousandth of a gram or approximately the weight of a small snowflake. It is commonly used to measure the weight of drugs and supplements.

💡 Did you know that a single milligram of spider venom can kill a small animal like a mouse? That's why milligrams are used to measure the potency of toxins and medications.

Ounces

📖 An ounce is a unit of mass that is equal to 1/16th of a pound or approximately 28 grams. It is commonly used to measure the weight of liquids and small objects.

💡 The word "ounce" comes from the Latin word "uncia," which means "one-twelfth." This is because the ounce was originally defined as 1/12th of a pound, which was a common unit of weight in ancient Rome.

Pennyweight

📖 A pennyweight is a unit of mass that is equal to 1/20th of a troy ounce or approximately 1.56 grams. It is commonly used to measure the weight of precious metals like gold and silver.

💡 The pennyweight was originally used in medieval England as a way to value precious metals based on their weight. One pennyweight was the equivalent of 240 silver pennies!

Pounds

📖 A pound is a unit of mass that is equal to 16 ounces or approximately the weight of a small watermelon. It is commonly used to measure the weight of people, animals, and large objects.

💡 The pound was originally defined in ancient Rome as the weight of 12 bronze coins called "unciae." This is where the symbol "lb" for pound comes from, as it is an abbreviation of the Latin word "libra," which means "scale" or "balance".

Stone

📖A stone is a unit of mass equal to 14 pounds (approximately the weight of a bowling ball). It is commonly used in the UK and Ireland to measure people's weight, but also for weighing other goods.

💡 Did you know that the stone as a unit of measure can be traced back to ancient times? The ancient Egyptians used stones as weights for trade, and the practice continued throughout history. The stone was even used in medicine during the Middle Ages to measure patients' weight.

Long-tons

📖 A long ton is a unit of mass equal to 2,240 pounds or approximately the weight of a small car. It is commonly used in the UK to measure the weight of goods, especially in shipping and mining.

💡 The long-ton is sometimes also called the "imperial ton" and is different from the short-ton used in the US, equal to 2,000 pounds.

Metric-tons

📖 A metric ton, also known as a tonne, is a unit of mass that is equal to 1,000 kilograms or approximately the weight of a small elephant. It is commonly used in scientific and industrial communities to measure the weight of large objects, such as vehicles or building materials.

💡 The metric ton is one of the SI base units and is used by almost every country in the world except for the US, which still primarily uses the imperial system.

Tons

📖 A ton is a unit of mass that can refer to either a short-ton or a long-ton, depending on the context. In the US, a ton is equal to 2,000 pounds, while in the UK, it can refer to either 2,000 or 2,240 pounds. It is commonly used to measure the weight of heavy objects, such as vehicles or machinery.

💡 The word "ton" comes from the Old English word "tunne," which means a large barrel or cask. This is because the weight of a barrel full of wine or beer was often used as a standard measurement in medieval times.

Troy-ounces

📖 A troy ounce is a unit of mass that is commonly used to measure the weight of precious metals like gold and silver. It is equal to 31.1 grams or approximately the weight of a golf ball.

💡 The troy ounce is named after the city of Troyes in France, which was a major center of trade and commerce during medieval times. The city was known for its high-quality textiles, and the weight of its gold and silver coins became the standard for trade throughout Europe.

Troy-pounds

📖 A troy pound is a unit of mass that is equal to 12 troy ounces or approximately 373 grams. It is commonly used in the precious metals industry to measure the weight of gold and silver.

💡 The troy pound was originally used in medieval England as a way to value precious metals based on their weight. One troy pound was the equivalent of 240 silver pennies!