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Weight (Mass) Conversion Calculator
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.
| To Convert from Unit |
Unit Symbol |
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.