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

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

1 (kilogram) is equal to:


(plain text)
kiloton (gigagram)Show sourcektonktonkton, Gg0.000001
ton (megagram)Show sourcetontonton, Mg0.001
quintalShow sourceqqq0.01
kilonewtonShow sourcekNkNkN0.009806652
kilogramShow sourcekgkgkg1
hectogramShow sourcehghghg10
decagramShow sourcedagdagdag100
gramShow sourceggg1000
caratShow sourcectctct5000
centigramShow sourcecgcgcg100000
milligramShow sourcemgmgmg1000000
microgramShow sourceμg\mu gµg1000000000
nanogramShow sourcengngng1×1012
atomic mass unitShow sourceuuu6.022141983×1026

Avoirdupois, U.S.

(plain text)
long tonShow sourcetontonton0.000984207
short tonShow sourcesh tn\text{sh tn}sh tn0.001102311
long hundredweightShow sourcecwtcwtcwt0.019684131
short hundredweightShow sourcesh cwt\text{sh cwt}sh cwt0.022046226
stoneShow sourceststst0.157473044
poundShow sourcelb av\text{lb av}lb av2.204622622
ounceShow sourceoz av\text{oz av}oz av35.27396195
dramShow sourcedr av\text{dr av}dr av564.383391293
grainShow sourcegrgrgr15432.3583529

troy & apothecaries

(plain text)
poundShow sourcelb t\text{lb t}lb t2.679228881
ounceShow sourceoz t\text{oz t}oz t32.150746569
dramShow sourcedr t\text{dr t}dr t257.205972549
pennyweightShow sourcedwt\text{dwt}dwt, pwt643.014931373
scrupleShow sources ap\text{s ap}s ap771.617917647
caratShow sourcekt\text{kt}kt4873.37632199
grainShow sourcegr\text{gr}gr15432.3583529
miteShow source308647.167059
doiteShow source7406798.40398

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.
    • 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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"Calculla v1" version of this calculatorIn December 2016 the Calculla website has been republished using new technologies and all calculators have been rewritten. Old version of the Calculla is still available through this link: We left the version 1 of Calculla untouched for archival purposes.
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