Weight (Mass) Conversion Calculator

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About this Converter

This online conversion calculator will convert among different units of weight or mass. For more specific calculations use avoirdupois unit conversions and troy unit conversions.

How to Convert Units of Acceleration

Conversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem:

S * C = E

Where S is our starting value, C is our conversion factor, and E is our end converted result.

To simply convert from any unit into grams, for example, from 5 kilograms, just multiply by the conversion value in the right column in the table below.

5 kg * 1000 [ (g) / (kg) ] = 5000 g

To convert from g into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x.

5000 g / 1000  [ (g) / (kg) ] = 5 kg

To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into grams then divide by the factor for B to convert out of g.  Or, you can find the single factor you need by dividing the A factor by the B factor.

For example, to convert from kilograms to pounds you would multiply by 1000 then divide by 453.59237.  Or, multiply by 1000/453.59237 = 2.204622. So, to convert directly from kg to lb, you multiply by 2.204622.

Units, symbols and conversion values
used in this mass calculator
To Convert from
and Convert to
( g )
Multiply by
( g / Unit )
carat (metric) ct gram 0.2
point (metric) pt gram 0.002
dram (avdp) dr gram 1.771845195
dram (troy) dr gram 3.8879346
grain (metric) gr gram 0.05
grain (troy) gr gram 0.06479891
gram g gram 1
hundredweight (long) hwt gram 50802.34544
hundredweight (short) hwt gram 45359.237
kilogram kg gram 1000
megagram Mg gram 1000000
milligram mg gram 0.001
ounce (avdp) oz gram 28.34952313
ounce (troy) oz gram 31.1034768
pennyweight dwt gram 1.55517384
pound (avdp) lb gram 453.59237
pound (metric) lb gram 500
pound (troy) lb gram 373.2417216
slug slug gram 14593.903
stone st gram 6350.29318
ton-assay (long) l AT gram 32.666667
ton-assay (short) sh AT gram 29.166667
ton (long) l tn gram 1016046.909
ton (short) sh tn gram 907184.74
ton-metric t gram 1000000
tonne (U.S. metric ton) t gram 1000000

References/ Further Reading

The National Institute of Standards and Technology (NIST) - The NIST Guide for the use of the International System of Units - Appendix B, subsections B.8 Factors for Units Listed Alphabetically and B.9 Factors for units listed by kind of quantity or field of science.

Lide, David R., Daniel (Editor-in-Chief). CRC Handbook of Chemistry and Physics, 89th Edition New York, NY: CRC Press, p. 1-28, 2008.

Wikipedia contributors. "Conversion of units" Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, last visited 24 Jun. 2011.


Cite this content, page or calculator as:

Furey, Edward "Weight (Mass) Conversion Calculator" From http://www.CalculatorSoup.com - Online Calculator Resource.