Mass conversion: unit selection
The conversion calculator converts to and from carats, grams, hectograms, kilograms, milligrams, ounces, pounds as well as other less commonly used units (see below). Select what you want to convert from and what you want to convert to. Then press the "Conversion calculator" button.
Mass conversion calculator
Mass is the measure of the amount of matter in an object. In everyday use weight is synonym of mass.
Units of mass supported by the converter:
| Unit | Symbol | Description |
|---|---|---|
| attogram | ag | Metric system. One Quintillionth of a gram. |
| attotonne | at | One quintillionth of a tonne. |
| carat | CD | The carat is used to measure gems and pearls. One carat is equal to 200 mg. |
| cental | cwt | Cental is another name for short hundredweight. One cental is equal to 100 pounds avoirdupois. |
| centigram | cg | A hundredth of a gram in the metric system |
| centitonne | ct | One hundredth of a tonne |
| decagram | dag | Metric system. One decagram is 10 grams |
| decatonne | dat | One decatonne is 10 tonnes |
| decigram | dg | A tenth of a gram in the metric system. |
| decitonne | dt | One tenth of a tonne. |
| exagram | Eg | One exagram in the metric system is equal to one quadrillion (1000000000000000) kilograms. |
| exatonne | Et | One exatonne is equal to one quintillion (1000000000000000000) tonnes. |
| femtogram | fg | Metric system. One quadrillionth of a gram. |
| femtotonne | ft | One quadrillionth of a tonne. |
| gigagram | Gg | Metric system. One gigagram is equal to one million kilograms. |
| gigatonne | Gt | One gigatonne is equal to one billion (1000000000) tonnes. |
| grain | gr | One grain is equal to 64.79891 mg. |
| gram | g | A gram, in the metric system, is equal to one thousandth of a kilogram. |
| gross ton | L/T | Gross ton is another name for the long ton. It has been replaced by the metric ton for most uses. |
| hectogram | hg | Metric system. One hectogram is 100 grams. |
| hectotonne | ht | One hectotonne is 100 tonnes. |
| hundredweight (long) | cwt | In the imperial system, the long hundredweight is equal to 112 pounds avoirdupois. |
| hundredweight (short) | cwt | In US customary units, one short hundredweight is equal to 100 pounds avoirdupois. |
| imperial ton | L/T | Imperial ton is another name for the long ton. It has been replaced by the metric ton for most uses. |
| kilogram | kg | Metric system. Kilogram is the base unit for mass in the International System of Units. It's equal to about 2.2 lb. |
| kilotonne | kt | One kilotonne is equal to 1000 tonnes. |
| long ton | L/T | The long ton is equal to 2240 pounds. It has been replaced by the metric ton in most uses. |
| megagram | Mg | Metric system. One megagram is one thousand kilograms. |
| megatonne | Mt | One megatonne is one million tonnes. |
| metric grain | gr | metric grain is a unit used to measure pearls and diamonds. One metric grain is equal to 50 mg. |
| metric ton | M/T | Metric ton is another name for tonne. It's equal to one thousand kilogram. |
| microgram | ug | Metric system. One millionth of a gram. |
| microtonne | ut | One millionth of a tonne. |
| millicentigram | mcg | An obsolete unit of measure that is equal to 10ug |
| milligram | mg | A thousandth of a gram in the metric system. |
| millitonne | mt | One thousandth of a tonne (one kilogram). |
| nanogram | ng | Metric system. One billionth of a gram. |
| nanotonne | nt | One billionth of a tonne. |
| ounce | oz | One avoirdupois ounce is equal to 437.5 grains or about 28.350 grams. |
| pennyweight | dwt | 1 pennyweight is equal to 24 grains. It's an obsolete unit of measure. |
| petagram | Pg | Metric system. One petagram is equal to one trillion (1000000000000) kilograms. |
| petatonne | Pt | Metric system. One petatonne is equal to one quadrillion (1000000000000000) tonnes. |
| picogram | pg | Metric system. One trillionth of a gram. |
| picotonne | pt | One trillionth of a tonne. |
| pound | lb | This is the international avoirdupois pound and is equal to 16 ounces or 453.59237 grams. |
| short ton | S/T | One short ton is also referred to as ton in the United States. It's equal to 2000 pounds. |
| stone | st | The stone is a unit of measure in the imperial system. One stone is equal to 14 pounds. |
| teragram | Tg | Metric system. One teragram is equal to one billion (1000000000) kilograms. |
| teratonne | Tt | One teratonne is equal to one trillion (1000000000000) tonnes. |
| ton | S/T | 1 ton (short ton) is equal to 2000 pounds. |
| tonne | t | One tonne, also known as metric tonne is equal to 1000 kilograms. |
| troy ounce | oz | One troy ounce is equal to 480 grains in the troy system. |
| troy pound | lb | One troy pound equals 12 troy ounces. The troy pound is used for measuring precious metals and stones. |
| weight ton | L/T | Weight ton is another name for the long ton. It has been replaced by the metric ton for most uses. |