Weight Unit Converter
Quickly convert between weight units in Metric, Imperial, Troy and Apothecaries’ systems.
Result
0.001 kg
Frequently Asked Questions
What is the difference between weight and mass?
Mass is the amount of matter in an object and is constant everywhere. Weight is the force of gravity acting on an object's mass, which can vary depending on location (e.g., on the Moon vs. Earth).
What are the main systems for measuring weight?
The primary systems are the Metric system (using kilograms, grams), the Imperial system (using pounds, ounces), and specialized systems like Troy (for precious metals) and Apothecaries' (historically for medicine).
Why is the metric system widely used in science?
The metric system (SI units) is preferred in science for its simplicity, decimal-based conversions (powers of 10), and global standardization, which facilitates easier collaboration and understanding.
How many ounces are in a pound?
In the commonly used Avoirdupois system, there are 16 ounces (oz) in 1 pound (lb). This is standard for everyday items.
What is a troy ounce used for?
A troy ounce (oz t) is primarily used for weighing precious metals like gold, silver, and platinum. It is slightly heavier than the standard Avoirdupois ounce (approx. 31.1 grams vs. 28.35 grams).
What's the difference between a ton, tonne, and short ton?
A 'tonne' (metric ton) is 1,000 kilograms. A 'short ton' (US ton) is 2,000 pounds. An 'imperial ton' (long ton, UK) is 2,240 pounds. Always clarify which 'ton' is being referred to.
Why did historical weight systems like Apothecaries' exist?
Historical systems like Apothecaries' (using units like grains, scruples, drams) were developed for specific trades, such as medicine, before widespread global standardization of measurement units.