Weight and Mass Converter
Convert weight and mass units including kilogram, gram, milligram, ton (metric), pound and many more weight and mass units instantly and accurately.
Popular Weight and Mass Conversions
Quick access to the most commonly used weight and mass conversions.
About Weight and Mass Units
Free online weight and mass converter - converts between 70 units of weight and mass, including kilogram [kg], gram [g], milligram [mg], ton (metric) [t], etc. Also, explore many other unit converters or learn more about weight and mass unit conversions. Different unit systems are used worldwide, including the Metric System (SI) and the Imperial / US Customary System.
Metric System (SI)
The metric system is the most widely adopted international measurement standard. The base unit is the kilogram.
Imperial System (US)
The imperial system is commonly used in the United States and specialized international industries including aviation and maritime navigation.
Common Weight and Mass Units
Here are some of the most common weight and mass units and their abbreviations.
| Unit | Symbol | Type | In Kilogram |
|---|---|---|---|
| Kilogram | kg | Metric (base) | 1 kg |
| Gram | g | Metric | 0.001 kg |
| Milligram | mg | Metric | 0.000001 kg |
| Ton (metric) | t | Standard | 1000 kg |
| Pound | lbs | Imperial | 0.453592 kg |
| Ounce | oz | Imperial | 0.02835 kg |
| Carat | car, ct | Standard | 0.0002 kg |
| Ton (short) | ton (US) | Standard | 907.18474 kg |
| Ton (long) | ton (UK) | Standard | 1016.046909 kg |
| Atomic mass unit | u | Standard | 0 kg |
Common Conversion Formulas
Here are some useful weight and mass conversion formulas.
Frequently Asked Questions
Find answers to common questions about weight and mass conversion.
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