Your hub for everyday and specialist weight conversions
This section brings together UtilityEra's mass and weight guides in one place. Use it when you need to convert recipe measurements, body weight, parcel weight, freight loads, precious metals, or diamond and gemstone weights.
Start with a broad guide if you want the basics, or jump directly to the specific unit pair you need.
Essential Mass & Weight Guides
Which guide should you read first?
For cooking and baking
Start with the grams, ounces, and pounds guide. It is the most useful page for recipes, kitchen scales, ingredient weights, and package labels.
For body weight
Use the kilograms, pounds, and ounces guide if you track weight in both metric and imperial units. For UK-style body weight, use the stone, pounds, and kilograms guide.
For shipping and freight
Use the tonnes, kilograms, and pounds guide when working with cargo, vehicle limits, agricultural weights, and large shipments.
For gold and diamonds
Use the troy ounce guide for precious metals and the carat guide for diamonds and gemstones. These units are specialist weight systems and should not be mixed with regular ounces.
Common mass and weight units
Gram
A gram is a small metric unit used for food, ingredients, supplements, jewelry, parcels, and everyday measurements.
Kilogram
A kilogram equals 1,000 grams. It is widely used for body weight, groceries, luggage, packages, and scientific measurement.
Ounce
An ounce is an imperial and US customary weight unit. Regular ounces are different from troy ounces used for precious metals.
Pound
A pound equals 16 regular ounces. It is common in the United States for body weight, food labels, parcels, and retail goods.
Stone
A stone equals 14 pounds and is mostly used in the UK and Ireland for describing human body weight.
Tonne
A metric tonne equals 1,000 kilograms. It is used for large loads, freight, construction materials, vehicles, and industrial quantities.
Troy ounce
A troy ounce is used for gold, silver, platinum, and other precious metals. It is heavier than a regular ounce.
Carat
A carat is a gemstone weight unit. It is most often used for diamonds, where weight affects price but does not always equal visible size.
Mass and weight conversion FAQ
Is mass the same as weight?
In everyday use, people often say weight when they mean mass. Technically, mass measures the amount of matter, while weight depends on gravity. For normal conversions between grams, kilograms, ounces, and pounds, the practical result is the same.
What is the easiest way to convert grams to ounces?
For a quick estimate, divide grams by 28.35. For example, 100 grams is about 3.53 ounces.
How many pounds are in one kilogram?
One kilogram is about 2.20462 pounds. For fast mental math, many people use 2.2 pounds per kilogram.
Why is a troy ounce different from a regular ounce?
Precious metals use the troy weight system. A troy ounce is about 31.1035 grams, while a regular ounce is about 28.3495 grams.