Mass Units Converter

Coversion factor: 1 kg = 2.2046226218 lb

Additional information

Mass is a fundamental physical property of matter. It refers to the amount of matter an object contains and is often considered a measure of its inertia or resistance to acceleration. Mass is different from weight, as weight depends on the gravitational force acting on an object, while mass remains constant regardless of the gravitational field. Mass is typically measured in units such as kilograms (kg), pounds (lb), grams (g), or ounces (oz).

The standard unit of mass in the International System of Units (SI) is the kilogram (kg). It is defined as the mass of the International Prototype of the Kilogram, a platinum-iridium cylinder stored at the International Bureau of Weights and Measures.

In the US customary system, the most common units of mass include ounces (oz), pounds (lb), and US tons.

Mass Conversion Factors

	kilogram	gram	centigram	milligram	microgram	metric ton	pound	ounce	carat	atomic mass unit	stone	slug	grain	metric quintal	short ton	long ton	pennyweight	planck mass	short hundredweight	long hundredweight	troy ounce	earth mass
1 kilogram	1	1000	100000	1000000	1000000000	0.001	2.2046226218	35.27396195	5000	6.02214129e+26	0.1574730444	0.0685217656	15432.358353	0.01	0.0011023113	0.0009842065	643.01493137	45946380.574	0.0220462262	0.0196841306	32.150746569	1.674427639e-25
1 gram	0.001	1	100	1000	1000000	0.000001	0.0022046226	0.0352739619	5	6.02214129e+23	0.000157473	0.0000685218	15.432358353	0.00001	0.0000011023	9.842065276e-7	0.6430149314	45946.380574	0.0000220462	0.0000196841	0.0321507466	1.674427639e-28
1 centigram	0.00001	0.01	1	10	10000	1e-8	0.0000220462	0.0003527396	0.05	6.02214129e+21	0.0000015747	6.852176556e-7	0.1543235835	1e-7	1.102311311e-8	9.842065276e-9	0.0064301493	459.46380574	2.204622622e-7	1.968413055e-7	0.0003215075	1.674427639e-30
1 milligram	0.000001	0.001	0.1	1	1000	1e-9	0.0000022046	0.000035274	0.005	602214129011674000000	1.574730444e-7	6.852176556e-8	0.0154323584	1e-8	1.102311311e-9	9.842065276e-10	0.0006430149	45.946380574	2.204622622e-8	1.968413055e-8	0.0000321507	1.674427639e-31
1 microgram	1e-9	0.000001	0.0001	0.001	1	1e-12	2.204622622e-9	3.527396195e-8	0.000005	602214129011674100	1.574730444e-10	6.852176556e-11	0.0000154324	1e-11	1.102311311e-12	9.842065276e-13	6.430149314e-7	0.0459463806	2.204622622e-11	1.968413055e-11	3.215074657e-8	1.674427639e-34
1 metric ton	1000	1000000	100000000	1000000000	1000000000000	1	2204.6226218	35273.96195	5000000	6.02214129e+29	157.47304442	68.521765562	15432358.353	10	1.1023113109	0.9842065276	643014.93137	45946380574	22.046226218	19.684130552	32150.746569	1.674427639e-22
1 pound	0.45359237	453.59237	45359.237	453592.37	453592370	0.0004535924	1	16	2267.96185	2.73159734e+26	0.0714285714	0.03108095	7000	0.0045359237	0.0005	0.0004464286	291.66666667	20840927.657	0.01	0.0089285714	14.583333333	7.595076011e-26
1 ounce	0.0283495231	28.349523125	2834.9523125	28349.523125	28349523.125	0.0000283495	0.0625	1	141.74761563	1.707248338e+25	0.0044642857	0.0019425594	437.5	0.0002834952	0.00003125	0.0000279018	18.229166667	1302557.9786	0.000625	0.0005580357	0.9114583333	4.746922507e-27
1 carat	0.0002	0.2	20	200	200000	2e-7	0.0004409245	0.0070547924	1	1.204428258e+23	0.0000314946	0.0000137044	3.0864716706	0.000002	2.204622622e-7	1.968413055e-7	0.1286029863	9189.2761148	0.0000044092	0.0000039368	0.0064301493	3.348855278e-29
1 atomic mass unit	1.660538921e-27	1.660538921e-24	1.660538921e-22	1.660538921e-21	1.660538921e-18	1.660538921e-30	3.66086167e-27	5.857378672e-26	8.302694605e-24	1	2.614901193e-28	1.137830587e-28	2.562603169e-23	1.660538921e-29	1.830430835e-30	1.634313245e-30	1.06775132e-24	7.629575322e-20	3.66086167e-29	3.268626491e-29	5.338756602e-26	2.780452265e-52
1 stone	6.35029318	6350.29318	635029.318	6350293.18	6350293180	0.0063502932	14	224	31751.4659	3.824236276e+27	1	0.4351333005	98000	0.0635029318	0.007	0.00625	4083.3333333	291772987.2	0.14	0.125	204.16666667	1.063310641e-24
1 slug	14.593903	14593.903	1459390.3	14593903	14593903000	0.014593903	32.174048695	514.78477912	72969.515	8.788654584e+27	2.2981463353	1	225218.34086	0.14593903	0.0160870243	0.0143634146	9384.097536	670537021.3	0.3217404869	0.2872682919	469.2048768	2.443643454e-24
1 grain	0.0000647989	0.06479891	6.479891	64.79891	64798.91	6.479891e-8	0.0001428571	0.0022857143	0.32399455	3.902281915e+22	0.0000102041	0.0000044401	1	6.479891e-7	7.142857143e-8	6.37755102e-8	0.0416666667	2977.2753796	0.0000014286	0.0000012755	0.0020833333	1.085010859e-29
1 metric quintal	100	100000	10000000	100000000	100000000000	0.1	220.46226218	3527.396195	500000	6.02214129e+28	15.747304442	6.8521765562	1543235.8353	1	0.1102311311	0.0984206528	64301.493137	4594638057.4	2.2046226218	1.9684130552	3215.0746569	1.674427639e-23
1 short ton	907.18474	907184.74	90718474	907184740	907184740000	0.90718474	2000	32000	4535923.7	5.463194681e+29	142.85714286	62.161900076	14000000	9.0718474	1	0.8928571429	583333.33333	41681855315	20	17.857142857	29166.666667	1.519015202e-22
1 long ton	1016.0469088	1016046.9088	101604690.88	1016046908.8	1016046908800	1.0160469088	2240	35840	5080234.544	6.118778042e+29	160	69.621328085	15680000	10.160469088	1.12	1	653333.33333	46683677953	22.4	20	32666.666667	1.701297026e-22
1 pennyweight	0.0015551738	1.55517384	155.517384	1555.17384	1555173.84	0.0000015552	0.0034285714	0.0548571429	7.7758692	9.365476595e+23	0.000244898	0.0001065633	24	0.0000155517	0.0000017143	0.0000015306	1	71454.609111	0.0000342857	0.0000306122	0.05	2.604026061e-28
1 planck mass	2.17645e-8	0.0000217645	0.00217645	0.0217645	21.7645	2.17645e-11	4.798250905e-8	7.677201449e-7	0.0001088225	13106889410874583000	3.427322075e-9	1.491341967e-9	0.0003358776	2.17645e-10	2.399125453e-11	2.142076297e-11	0.0000139949	1	4.798250905e-10	4.284152594e-10	6.997449237e-7	3.644308034e-33
1 short hundredweight	45.359237	45359.237	4535923.7	45359237	45359237000	0.045359237	100	160	226796.185	2.73159734e+28	7.1428571429	3.1080950038	700000	0.45359237	0.05	0.0446428571	29166.666667	2084092765.7	1	0.8928571429	1458.3333333	7.595076011e-24
1 long hundredweight	50.80234544	50802.34544	5080234.544	50802345.44	50802345440	0.0508023454	112	1792	254011.7272	3.059389021e+28	8	3.4810664042	784000	0.5080234544	0.056	0.05	32666.666667	2334183897.6	1.12	1	1633.3333333	8.506485132e-24
1 troy ounce	0.0311034768	31.1034768	3110.34768	31103.4768	31103476.8	0.0000311035	0.0685714286	1.0971428571	155.517384	1.873095319e+25	0.0048979592	0.0021312651	480	0.0003110348	0.0000342857	0.0000306122	20	1429092.1822	0.0006857143	0.0006122449	1	5.208052122e-27
1 earth mass	5.97219e+24	5.97219e+27	5.97219e+29	5.97219e+30	5.97219e+33	5.97219e+21	1.316642518e+25	2.106628028e+26	2.986095e+28	3.596537199e+51	9.404589411e+23	4.092250031e+23	9.216497623e+28	5.97219e+22	6.583212588e+21	5.877868382e+21	3.840207343e+27	2.744005146e+32	1.316642518e+23	1.175573676e+23	1.920103671e+26	1

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References: National Institute of Standards and Technology (NIST). “SI Units - Mass”. https://www.nist.gov/pml/owm/si-units-mass. Bureau International des Poids et Mesures (BIPM). “The International System of Units (SI)”. https://www.bipm.org/en/measurement-units/.