Mass units converter
Mass (weight) units converter - converts units between metric (tons, kilograms, etc.), Avoirdupois/US (pounds, ounces) and troy systems

# Symbolic algebra

ⓘ Hint: This calculator supports symbolic math. You can enter numbers, but also symbols like a, b, pi or even whole math expressions such as (a+b)/2. If you still don't sure how to make your life easier using symbolic algebra check out our another page: Symbolic calculations

# Inputs data - value and unit, which we're going to convert#

 Value Unit kiloton (gigagram) [kton, Gg]ton (megagram) [ton, Mg]quintal [q]kilonewton [kN]kilogram [kg]hectogram [hg]decagram [dag]gram [g]carat [ct]centigram [cg]milligram [mg]microgram [µg]nanogram [ng]atomic mass unit [u]long ton [ton]short ton [sh tn]long hundredweight [cwt]short hundredweight [sh cwt]stone [st]pound [lb av]ounce [oz av]dram [dr av]grain [gr]pound [lb t]ounce [oz t]dram [dr t]pennyweight [dwt, pwt]scruple [s ap]grain [gr]carat [kt]mitedoite Decimals 0123456789

# metric#

 Unit Symbol Symbol(plain text) Value as symbolic Value as numeric Notes Unit conversion formula kiloton (gigagram) Show source$kton$ kton, Gg Show source$\text{...}$ - Equivalent to one thousand tons or one million kilograms. See ton unit for more information.$1\ kton = 1000\ ton = 10^6\ kg$ Show source$...$ ton (megagram) Show source$ton$ ton, Mg Show source$\text{...}$ - Equivalent to one thousand kilograms or one million grams. See the kilo unit to learn more.$1\ ton = 1000\ kg = 10^6\ g$ Show source$...$ quintal Show source$q$ q Show source$\text{...}$ - Unit of mass used in agriculture. One quintal corresponds to one hundred kilograms (100 kg). See the kilogram unit to learn more.$1\ q = 100\ kg$ Show source$...$ kilonewton Show source$kN$ kN Show source$\text{...}$ - Colloquially equivalent to the mass of the body, which when placed in the gravitational field of the Earth will act on the force of one kilonewton. Since in the formal language newton is a forc eunit, not mass, the use of this phrase is not currently recommended.$1\ kN\ (mass) = \frac{1000\ N}{\text{gravitational acceleration}} \approx \frac{1000\ kg \cdot \cancel{m/s^2}}{9.81\ \cancel{m/s^2}} \approx 101.9716005\ kg$ Show source$...$ kilogram Show source$kg$ kg Show source$\text{...}$ - The basic unit of mass in SI system. From May 20, 2019, the following kilogram definition applies: „Kilogram, kg, unit of mass in SI. It is defined by adopting the set numerical value of the Planck constant h, which is 6.62607015⋅10 −34 , expressed in the unit J · s, which is equal to kg⋅m2 ⋅s-1, with the meter and second being defined by c and ∆νCs.” Show source$...$ hectogram Show source$hg$ hg Show source$\text{...}$ - One hundred grams or one tenth of a kilogram. See the kilo unit to learn more.$1\ hg = 100\ g = \frac{1}{10}\ kg$ Show source$...$ decagram Show source$dag$ dag Show source$\text{...}$ - Ten grams or one hundredth of a kilogram.$1\ dag = 10\ g = \frac{1}{100}\ kg$ Show source$...$ gram Show source$g$ g Show source$\text{...}$ - One thousandth of a kilo. Before the spread of SI units, it was the basic mass unit in the centimeter-gram-second system (CGS). See the kilogram unit to learn more.$1\ g = \frac{1}{1000}\ kg$ Show source$...$ carat Show source$ct$ ct Show source$\text{...}$ - A unit of mass used in jewelry to determine the weight of stones and pearls, as well as the purity of gold. One carat corresponds to two tenths of a gram (0.2 g). See the gram unit to learn more.$1\ ct = \frac{2}{10}\ g = 0.2\ g$ Show source$...$ centigram Show source$cg$ cg Show source$\text{...}$ - Equivalent to one hundredth of a gram. See the gram unit to learn more.$1\ cg = \frac{1}{100}\ g = 0.01\ g$ Show source$...$ milligram Show source$mg$ mg Show source$\text{...}$ - Equivalent to one millionth of a gram. Unit often used in chemistry for weighing reagents on a laboratory scale. See the gram unit to learn more.$1\ mg = \frac{1}{1000}\ g = 0.001\ g$ Show source$...$ microgram Show source$\mu g$ µg Show source$\text{...}$ - Equivalent to one millionth of a gram. See the gram unit to learn more.$1\ \mu g = 10^{-6}\ g$ Show source$...$ nanogram Show source$ng$ ng Show source$\text{...}$ - Equivalent to one billionth of a gram. See the gram unit to learn more.$1\ ng = 10^{-9}\ g$ Show source$...$ atomic mass unit Show source$u$ u Show source$\text{...}$ - A unit of mass used in chemistry and atomic physics. Another name for this unit is dalton. One dalton corresponds to one twelfth of the mass of a carbon atom 12C, which is approximately the mass of one hydrogen atom.$1\ u = \frac{1}{12} m_{^{12}C} \approx m_{H}$ Show source$...$

# Avoirdupois, U.S.#

 Unit Symbol Symbol(plain text) Value as symbolic Value as numeric Notes Unit conversion formula long ton Show source$ton$ ton Show source$\text{...}$ - Equivalent to two thousand two hundred and forty US pounds (2240 lbs). See the pound unit for more information.$1\ ton = 2240\ lbs$ Show source$...$ short ton Show source$\text{sh tn}$ sh tn Show source$\text{...}$ - Equivalent to two thousand US pounds (2000 lbs). See the pound unit for more information.$1\ ton = 2000\ lbs$ Show source$...$ long hundredweight Show source$cwt$ cwt Show source$\text{...}$ - Equivalent to one hundred and twelve US pounds (112 lbs). See the pound unit for more information.$1\ cwt = 112\ lbs$ Show source$...$ short hundredweight Show source$\text{sh cwt}$ sh cwt Show source$\text{...}$ - Equivalent to one hundred US pounds (100 lbs) . See the pound unit for more information.$1\ sh\ cwt = 100\ lbs$ Show source$...$ stone Show source$st$ st Show source$\text{...}$ - Unit of mass used in Great Britain. One stone corresponds to fourteen pounds (14 lbs). See the pound unit for more information.$1\ st = 14\ lbs$ Show source$...$ pound Show source$\text{lb av}$ lb av Show source$\text{...}$ - Unit of mass used in Anglo-Saxon countries. One international pound corresponds to approximately four hundred and fifty grams.$1\ lb = 0.45359237\ kg$ Show source$...$ ounce Show source$\text{oz av}$ oz av Show source$\text{...}$ - Equivalent to one sixteenth pound. See the pound unit for more information.$1\ oz\ av = \frac{1}{16}\ lb$ Show source$...$ dram Show source$\text{dr av}$ dr av Show source$\text{...}$ - Equivalent to one sixteenth ounce or one two hundred and fifty sixths of a pound. See ounce or pound units for more information.$1\ dr = \frac{1}{16}\ oz = \frac{1}{256}\ lb$ Show source$...$ grain Show source$gr$ gr Show source$\text{...}$ - Equivalent to 1/7000 pounds. See the pound unit for more information.$1\ gr = \frac{1}{7000}\ lb$ Show source$...$

# troy & apothecaries#

 Unit Symbol Symbol(plain text) Value as symbolic Value as numeric Notes Unit conversion formula pound Show source$\text{lb t}$ lb t Show source$\text{...}$ - Historic mass unit used until 1879 in Great Britain to determine the mass of precious metals. One troy pound corresponded to approximately one third of a kilogram.$1\ lb\ t = 0.373241722\ kg$ Show source$...$ ounce Show source$\text{oz t}$ oz t Show source$\text{...}$ - Equivalent to one-twelfth of troy pound. See the troy pound unit for more information.$1\ oz\ t = \frac{1}{12}\ lb\ t$ Show source$...$ dram Show source$\text{dr t}$ dr t Show source$\text{...}$ - Equivalent to one-eighth of troy ounce (1/8 oz t) or one-ninety-sixth of troy pound (1/96 lb t). See troy ounce or pund to learn more.$1\ oz\ t = 1\ dr\ t = \frac{1}{8}\ oz\ t = \frac{1}{96}\ lb\ t$ Show source$...$ pennyweight Show source$\text{dwt}$ dwt, pwt Show source$\text{...}$ - Equivalent to one two hundred forty troy pounds (1/240 lb t) or one twentieth troy ounce (1/20 oz t). See troy pound or ounce units to learn more.$1\ dwt = \frac{1}{20}\ oz\ t = \frac{1}{240}\ lb\ t$ Show source$...$ scruple Show source$\text{s ap}$ s ap Show source$\text{...}$ - Equivalent to one-third of troy dram (1/3 dr t) or one two hundred eighty-eight of troy pound (1/288 lb t). See troy dram or pound units to learn more.$1\ s\ ap = \frac{1}{3}\ dr\ t = \frac{1}{288}\ dr\ t$ Show source$...$ grain Show source$\text{gr}$ gr Show source$\text{...}$ - Equivalent to twenty scruples (20 s ap) or 1/5760 of troy pound. See the scruple of troy pound units to learn more.$1\ gr\ t = 20\ ap\ s = \frac{1}{5760}\ lb\ t$ Show source$...$ carat Show source$\text{kt}$ kt Show source$\text{...}$ - Equivalent to three and one sixth of troy grains (3 1/6 gr t). See the troy grain unit to learn more.$1\ kt\ t = 3 \frac{1}{6}\ gr\ t = \frac{19}{34560}\ lb\ t$ Show source$...$ mite Show source$-$ - Show source$\text{...}$ - Equivalent to four hundred scruples (400 s ap) or 1/115200 of troy pound. See the scruple or troy pound units to learn more.$1\ \text{mite (troy)} = 400\ ap\ s = \frac{1}{115200}\ lb\ t$ Show source$...$ doite Show source$-$ - Show source$\text{...}$ - Equivalent to twenty-four mites (24 mite) or 1/2764800 of troy pound. See unit or troy pound units to learn more.$1\ \text{doite (troy)} = 24\ \text{mite (troy)} = \frac{1}{2764800}\ lb\ t$ Show source$...$

# Some facts#

• The mass is a measure of the amount of substance.
• The mass conception is closely related to the concept of inertia. This is a feature of material objects, which basically means that the body once set in motion retains its speed as long as it will not work on any external forces.
• The mass of body also determines the gravitation force. Any two bodies interact with force directly proportional to the product of their masses.
• There are objects without mass for example photons.
• In the first half of the twentieth century, Einstein created theory saying there is equivalence of mass and energy. This theory is related to one of the most famous physical formulas: E = mc2. The theory has been confirmed experimentally and succesfully applied to create nucler power plant and nuclear weapon. In both cases the energy is "created", while loss of mass is noticed. In other words, the mass is converted into energy.

# How to convert#

• Enter the number to field "value" - enter the NUMBER only, no other words, symbols or unit names. You can use dot (.) or comma (,) to enter fractions.
Examples:
• 1000000
• 123,23
• 999.99999
• Find and select your starting unit in field "unit". Some unit calculators have huge number of different units to select from - it's just how complicated our world is...
• And... you got the result in the table below. You'll find several results for many different units - we show you all results we know at once. Just find the one you're looking for.

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