Weight Converter
Convert between different weight units including metric (grams, kilograms), imperial (ounces, pounds), and more. Our tool supports precise conversions between all major weight measurement systems.
Special Weight Units
Atomic Mass Units (amu):6.022141e+26
Troy Ounces (oz t):3.215075e+1
Earth Masses:1.674481e-25
Solar Masses:5.027652e-31
Electron Rest Masses:1.097769e+30
Proton Rest Masses:5.978637e+26
Neutron Rest Masses:5.970408e+26
Fun Facts
- The word "pound" comes from the Latin "pondo" meaning "weight".
- A grain, the smallest unit in the imperial system, was originally based on the weight of a grain of wheat.
- One metric ton of water occupies exactly one cubic meter at 4°C.
- The kilogram was the last SI unit still defined by a physical object until 2019.
Historical Facts
- The troy ounce, still used for precious metals, dates back to the Roman monetary system.
- The metric system was created during the French Revolution to standardize weights and measures.
- The stone weight (14 pounds) originated from the weight of stones used in medieval wool trade.
- The drachm was an ancient Greek unit, originally based on the weight a hand could hold.