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Mass convert.conversions

26 conversions mass units supported.

All Mass Units

Click any conversion below to open the dedicated calculator with detailed formulas, conversion tables, and common values.

Kilogram -> Gram Kilogram -> Milligram Kilogram -> Microgram Kilogram -> Nanogram Kilogram -> Picogram Kilogram -> Metric Ton Kilogram -> Pound Kilogram -> Ounce Kilogram -> Stone Kilogram -> Short Ton (US)Kilogram -> Long Ton (UK)Kilogram -> Grain Kilogram -> Dram Kilogram -> Carat Kilogram -> Troy Ounce Kilogram -> Troy Pound Kilogram -> Pennyweight Kilogram -> Scruple Kilogram -> Slug Kilogram -> Atomic Mass Unit Kilogram -> Quintal Kilogram -> Hundredweight (US)Kilogram -> Hundredweight (UK)Kilogram -> Centigram Kilogram -> Decigram Gram -> Kilogram Gram -> Milligram Gram -> Microgram Gram -> Nanogram Gram -> Picogram Gram -> Metric Ton Gram -> Pound Gram -> Ounce Gram -> Stone Gram -> Short Ton (US)Gram -> Long Ton (UK)Gram -> Grain Gram -> Dram Gram -> Carat Gram -> Troy Ounce Gram -> Troy Pound Gram -> Pennyweight Gram -> Scruple Gram -> Slug Gram -> Atomic Mass Unit Gram -> Quintal Gram -> Hundredweight (US)Gram -> Hundredweight (UK)Gram -> Centigram Gram -> Decigram Milligram -> Kilogram Milligram -> Gram Milligram -> Microgram Milligram -> Nanogram Milligram -> Picogram Milligram -> Metric Ton Milligram -> Pound Milligram -> Ounce Milligram -> Stone Milligram -> Short Ton (US)Milligram -> Long Ton (UK)Milligram -> Grain Milligram -> Dram Milligram -> Carat Milligram -> Troy Ounce Milligram -> Troy Pound Milligram -> Pennyweight Milligram -> Scruple Milligram -> Slug Milligram -> Atomic Mass Unit Milligram -> Quintal Milligram -> Hundredweight (US)Milligram -> Hundredweight (UK)Milligram -> Centigram Milligram -> Decigram Microgram -> Kilogram Microgram -> Gram Microgram -> Milligram Microgram -> Nanogram Microgram -> Picogram Microgram -> Metric Ton Microgram -> Pound Microgram -> Ounce Microgram -> Stone Microgram -> Short Ton (US)Microgram -> Long Ton (UK)Microgram -> Grain Microgram -> Dram Microgram -> Carat Microgram -> Troy Ounce Microgram -> Troy Pound Microgram -> Pennyweight Microgram -> Scruple Microgram -> Slug Microgram -> Atomic Mass Unit Microgram -> Quintal Microgram -> Hundredweight (US)Microgram -> Hundredweight (UK)Microgram -> Centigram Microgram -> Decigram Nanogram -> Kilogram Nanogram -> Gram Nanogram -> Milligram Nanogram -> Microgram Nanogram -> Picogram Nanogram -> Metric Ton Nanogram -> Pound Nanogram -> Ounce Nanogram -> Stone Nanogram -> Short Ton (US)Nanogram -> Long Ton (UK)Nanogram -> Grain Nanogram -> Dram Nanogram -> Carat Nanogram -> Troy Ounce Nanogram -> Troy Pound Nanogram -> Pennyweight Nanogram -> Scruple Nanogram -> Slug Nanogram -> Atomic Mass Unit Nanogram -> Quintal Nanogram -> Hundredweight (US)Nanogram -> Hundredweight (UK)Nanogram -> Centigram Nanogram -> Decigram Picogram -> Kilogram Picogram -> Gram Picogram -> Milligram Picogram -> Microgram Picogram -> Nanogram Picogram -> Metric Ton Picogram -> Pound Picogram -> Ounce Picogram -> Stone Picogram -> Short Ton (US)Picogram -> Long Ton (UK)Picogram -> Grain Picogram -> Dram Picogram -> Carat Picogram -> Troy Ounce Picogram -> Troy Pound Picogram -> Pennyweight Picogram -> Scruple Picogram -> Slug Picogram -> Atomic Mass Unit Picogram -> Quintal Picogram -> Hundredweight (US)Picogram -> Hundredweight (UK)Picogram -> Centigram Picogram -> Decigram Metric Ton -> Kilogram Metric Ton -> Gram Metric Ton -> Milligram Metric Ton -> Microgram Metric Ton -> Nanogram Metric Ton -> Picogram Metric Ton -> Pound Metric Ton -> Ounce Metric Ton -> Stone Metric Ton -> Short Ton (US)Metric Ton -> Long Ton (UK)Metric Ton -> Grain Metric Ton -> Dram Metric Ton -> Carat Metric Ton -> Troy Ounce Metric Ton -> Troy Pound Metric Ton -> Pennyweight Metric Ton -> Scruple Metric Ton -> Slug Metric Ton -> Atomic Mass Unit Metric Ton -> Quintal Metric Ton -> Hundredweight (US)Metric Ton -> Hundredweight (UK)Metric Ton -> Centigram Metric Ton -> Decigram Pound -> Kilogram Pound -> Gram Pound -> Milligram Pound -> Microgram Pound -> Nanogram Pound -> Picogram Pound -> Metric Ton Pound -> Ounce Pound -> Stone Pound -> Short Ton (US)Pound -> Long Ton (UK)Pound -> Grain Pound -> Dram Pound -> Carat Pound -> Troy Ounce Pound -> Troy Pound Pound -> Pennyweight Pound -> Scruple Pound -> Slug Pound -> Atomic Mass Unit Pound -> Quintal Pound -> Hundredweight (US)Pound -> Hundredweight (UK)Pound -> Centigram Pound -> Decigram Ounce -> Kilogram Ounce -> Gram Ounce -> Milligram Ounce -> Microgram Ounce -> Nanogram Ounce -> Picogram Ounce -> Metric Ton Ounce -> Pound Ounce -> Stone Ounce -> Short Ton (US)Ounce -> Long Ton (UK)Ounce -> Grain Ounce -> Dram Ounce -> Carat Ounce -> Troy Ounce Ounce -> Troy Pound Ounce -> Pennyweight Ounce -> Scruple Ounce -> Slug Ounce -> Atomic Mass Unit Ounce -> Quintal Ounce -> Hundredweight (US)Ounce -> Hundredweight (UK)Ounce -> Centigram Ounce -> Decigram Stone -> Kilogram Stone -> Gram Stone -> Milligram Stone -> Microgram Stone -> Nanogram Stone -> Picogram Stone -> Metric Ton Stone -> Pound Stone -> Ounce Stone -> Short Ton (US)Stone -> Long Ton (UK)Stone -> Grain Stone -> Dram Stone -> Carat Stone -> Troy Ounce Stone -> Troy Pound Stone -> Pennyweight Stone -> Scruple Stone -> Slug Stone -> Atomic Mass Unit Stone -> Quintal Stone -> Hundredweight (US)Stone -> Hundredweight (UK)Stone -> Centigram Stone -> Decigram Short Ton (US) -> Kilogram Short Ton (US) -> Gram Short Ton (US) -> Milligram Short Ton (US) -> Microgram Short Ton (US) -> Nanogram Short Ton (US) -> Picogram Short Ton (US) -> Metric Ton Short Ton (US) -> Pound Short Ton (US) -> Ounce Short Ton (US) -> Stone Short Ton (US) -> Long Ton (UK)Short Ton (US) -> Grain Short Ton (US) -> Dram Short Ton (US) -> Carat Short Ton (US) -> Troy Ounce Short Ton (US) -> Troy Pound Short Ton (US) -> Pennyweight Short Ton (US) -> Scruple Short Ton (US) -> Slug Short Ton (US) -> Atomic Mass Unit Short Ton (US) -> Quintal Short Ton (US) -> Hundredweight (US)Short Ton (US) -> Hundredweight (UK)Short Ton (US) -> Centigram Short Ton (US) -> Decigram Long Ton (UK) -> Kilogram Long Ton (UK) -> Gram Long Ton (UK) -> Milligram Long Ton (UK) -> Microgram Long Ton (UK) -> Nanogram Long Ton (UK) -> Picogram Long Ton (UK) -> Metric Ton Long Ton (UK) -> Pound Long Ton (UK) -> Ounce Long Ton (UK) -> Stone Long Ton (UK) -> Short Ton (US)Long Ton (UK) -> Grain Long Ton (UK) -> Dram Long Ton (UK) -> Carat Long Ton (UK) -> Troy Ounce Long Ton (UK) -> Troy Pound Long Ton (UK) -> Pennyweight Long Ton (UK) -> Scruple Long Ton (UK) -> Slug Long Ton (UK) -> Atomic Mass Unit Long Ton (UK) -> Quintal Long Ton (UK) -> Hundredweight (US)Long Ton (UK) -> Hundredweight (UK)Long Ton (UK) -> Centigram Long Ton (UK) -> Decigram Grain -> Kilogram Grain -> Gram Grain -> Milligram Grain -> Microgram Grain -> Nanogram Grain -> Picogram Grain -> Metric Ton Grain -> Pound Grain -> Ounce Grain -> Stone Grain -> Short Ton (US)Grain -> Long Ton (UK)Grain -> Dram Grain -> Carat Grain -> Troy Ounce Grain -> Troy Pound Grain -> Pennyweight Grain -> Scruple Grain -> Slug Grain -> Atomic Mass Unit Grain -> Quintal Grain -> Hundredweight (US)Grain -> Hundredweight (UK)Grain -> Centigram Grain -> Decigram Dram -> Kilogram Dram -> Gram Dram -> Milligram Dram -> Microgram Dram -> Nanogram Dram -> Picogram Dram -> Metric Ton Dram -> Pound Dram -> Ounce Dram -> Stone Dram -> Short Ton (US)Dram -> Long Ton (UK)Dram -> Grain Dram -> Carat Dram -> Troy Ounce Dram -> Troy Pound Dram -> Pennyweight Dram -> Scruple Dram -> Slug Dram -> Atomic Mass Unit Dram -> Quintal Dram -> Hundredweight (US)Dram -> Hundredweight (UK)Dram -> Centigram Dram -> Decigram Carat -> Kilogram Carat -> Gram Carat -> Milligram Carat -> Microgram Carat -> Nanogram Carat -> Picogram Carat -> Metric Ton Carat -> Pound Carat -> Ounce Carat -> Stone Carat -> Short Ton (US)Carat -> Long Ton (UK)Carat -> Grain Carat -> Dram Carat -> Troy Ounce Carat -> Troy Pound Carat -> Pennyweight Carat -> Scruple Carat -> Slug Carat -> Atomic Mass Unit Carat -> Quintal Carat -> Hundredweight (US)Carat -> Hundredweight (UK)Carat -> Centigram Carat -> Decigram Troy Ounce -> Kilogram Troy Ounce -> Gram Troy Ounce -> Milligram Troy Ounce -> Microgram Troy Ounce -> Nanogram Troy Ounce -> Picogram Troy Ounce -> Metric Ton Troy Ounce -> Pound Troy Ounce -> Ounce Troy Ounce -> Stone Troy Ounce -> Short Ton (US)Troy Ounce -> Long Ton (UK)Troy Ounce -> Grain Troy Ounce -> Dram Troy Ounce -> Carat Troy Ounce -> Troy Pound Troy Ounce -> Pennyweight Troy Ounce -> Scruple Troy Ounce -> Slug Troy Ounce -> Atomic Mass Unit Troy Ounce -> Quintal Troy Ounce -> Hundredweight (US)Troy Ounce -> Hundredweight (UK)Troy Ounce -> Centigram Troy Ounce -> Decigram Troy Pound -> Kilogram Troy Pound -> Gram Troy Pound -> Milligram Troy Pound -> Microgram Troy Pound -> Nanogram Troy Pound -> Picogram Troy Pound -> Metric Ton Troy Pound -> Pound Troy Pound -> Ounce Troy Pound -> Stone Troy Pound -> Short Ton (US)Troy Pound -> Long Ton (UK)Troy Pound -> Grain Troy Pound -> Dram Troy Pound -> Carat Troy Pound -> Troy Ounce Troy Pound -> Pennyweight Troy Pound -> Scruple Troy Pound -> Slug Troy Pound -> Atomic Mass Unit Troy Pound -> Quintal Troy Pound -> Hundredweight (US)Troy Pound -> Hundredweight (UK)Troy Pound -> Centigram Troy Pound -> Decigram Pennyweight -> Kilogram Pennyweight -> Gram Pennyweight -> Milligram Pennyweight -> Microgram Pennyweight -> Nanogram Pennyweight -> Picogram Pennyweight -> Metric Ton Pennyweight -> Pound Pennyweight -> Ounce Pennyweight -> Stone Pennyweight -> Short Ton (US)Pennyweight -> Long Ton (UK)Pennyweight -> Grain Pennyweight -> Dram Pennyweight -> Carat Pennyweight -> Troy Ounce Pennyweight -> Troy Pound Pennyweight -> Scruple Pennyweight -> Slug Pennyweight -> Atomic Mass Unit Pennyweight -> Quintal Pennyweight -> Hundredweight (US)Pennyweight -> Hundredweight (UK)Pennyweight -> Centigram Pennyweight -> Decigram Scruple -> Kilogram Scruple -> Gram Scruple -> Milligram Scruple -> Microgram Scruple -> Nanogram Scruple -> Picogram Scruple -> Metric Ton Scruple -> Pound Scruple -> Ounce Scruple -> Stone Scruple -> Short Ton (US)Scruple -> Long Ton (UK)Scruple -> Grain Scruple -> Dram Scruple -> Carat Scruple -> Troy Ounce Scruple -> Troy Pound Scruple -> Pennyweight Scruple -> Slug Scruple -> Atomic Mass Unit Scruple -> Quintal Scruple -> Hundredweight (US)Scruple -> Hundredweight (UK)Scruple -> Centigram Scruple -> Decigram Slug -> Kilogram Slug -> Gram Slug -> Milligram Slug -> Microgram Slug -> Nanogram Slug -> Picogram Slug -> Metric Ton Slug -> Pound Slug -> Ounce Slug -> Stone Slug -> Short Ton (US)Slug -> Long Ton (UK)Slug -> Grain Slug -> Dram Slug -> Carat Slug -> Troy Ounce Slug -> Troy Pound Slug -> Pennyweight Slug -> Scruple Slug -> Atomic Mass Unit Slug -> Quintal Slug -> Hundredweight (US)Slug -> Hundredweight (UK)Slug -> Centigram Slug -> Decigram Atomic Mass Unit -> Kilogram Atomic Mass Unit -> Gram Atomic Mass Unit -> Milligram Atomic Mass Unit -> Microgram Atomic Mass Unit -> Nanogram Atomic Mass Unit -> Picogram Atomic Mass Unit -> Metric Ton Atomic Mass Unit -> Pound Atomic Mass Unit -> Ounce Atomic Mass Unit -> Stone Atomic Mass Unit -> Short Ton (US)Atomic Mass Unit -> Long Ton (UK)Atomic Mass Unit -> Grain Atomic Mass Unit -> Dram Atomic Mass Unit -> Carat Atomic Mass Unit -> Troy Ounce Atomic Mass Unit -> Troy Pound Atomic Mass Unit -> Pennyweight Atomic Mass Unit -> Scruple Atomic Mass Unit -> Slug Atomic Mass Unit -> Quintal Atomic Mass Unit -> Hundredweight (US)Atomic Mass Unit -> Hundredweight (UK)Atomic Mass Unit -> Centigram Atomic Mass Unit -> Decigram Quintal -> Kilogram Quintal -> Gram Quintal -> Milligram Quintal -> Microgram Quintal -> Nanogram Quintal -> Picogram Quintal -> Metric Ton Quintal -> Pound Quintal -> Ounce Quintal -> Stone Quintal -> Short Ton (US)Quintal -> Long Ton (UK)Quintal -> Grain Quintal -> Dram Quintal -> Carat Quintal -> Troy Ounce Quintal -> Troy Pound Quintal -> Pennyweight Quintal -> Scruple Quintal -> Slug Quintal -> Atomic Mass Unit Quintal -> Hundredweight (US)Quintal -> Hundredweight (UK)Quintal -> Centigram Quintal -> Decigram Hundredweight (US) -> Kilogram Hundredweight (US) -> Gram Hundredweight (US) -> Milligram Hundredweight (US) -> Microgram Hundredweight (US) -> Nanogram Hundredweight (US) -> Picogram Hundredweight (US) -> Metric Ton Hundredweight (US) -> Pound Hundredweight (US) -> Ounce Hundredweight (US) -> Stone Hundredweight (US) -> Short Ton (US)Hundredweight (US) -> Long Ton (UK)Hundredweight (US) -> Grain Hundredweight (US) -> Dram Hundredweight (US) -> Carat Hundredweight (US) -> Troy Ounce Hundredweight (US) -> Troy Pound Hundredweight (US) -> Pennyweight Hundredweight (US) -> Scruple Hundredweight (US) -> Slug Hundredweight (US) -> Atomic Mass Unit Hundredweight (US) -> Quintal Hundredweight (US) -> Hundredweight (UK)Hundredweight (US) -> Centigram Hundredweight (US) -> Decigram Hundredweight (UK) -> Kilogram Hundredweight (UK) -> Gram Hundredweight (UK) -> Milligram Hundredweight (UK) -> Microgram Hundredweight (UK) -> Nanogram Hundredweight (UK) -> Picogram Hundredweight (UK) -> Metric Ton Hundredweight (UK) -> Pound Hundredweight (UK) -> Ounce Hundredweight (UK) -> Stone Hundredweight (UK) -> Short Ton (US)Hundredweight (UK) -> Long Ton (UK)Hundredweight (UK) -> Grain Hundredweight (UK) -> Dram Hundredweight (UK) -> Carat Hundredweight (UK) -> Troy Ounce Hundredweight (UK) -> Troy Pound Hundredweight (UK) -> Pennyweight Hundredweight (UK) -> Scruple Hundredweight (UK) -> Slug Hundredweight (UK) -> Atomic Mass Unit Hundredweight (UK) -> Quintal Hundredweight (UK) -> Hundredweight (US)Hundredweight (UK) -> Centigram Hundredweight (UK) -> Decigram Centigram -> Kilogram Centigram -> Gram Centigram -> Milligram Centigram -> Microgram Centigram -> Nanogram Centigram -> Picogram Centigram -> Metric Ton Centigram -> Pound Centigram -> Ounce Centigram -> Stone Centigram -> Short Ton (US)Centigram -> Long Ton (UK)Centigram -> Grain Centigram -> Dram Centigram -> Carat Centigram -> Troy Ounce Centigram -> Troy Pound Centigram -> Pennyweight Centigram -> Scruple Centigram -> Slug Centigram -> Atomic Mass Unit Centigram -> Quintal Centigram -> Hundredweight (US)Centigram -> Hundredweight (UK)Centigram -> Decigram Decigram -> Kilogram Decigram -> Gram Decigram -> Milligram Decigram -> Microgram Decigram -> Nanogram Decigram -> Picogram Decigram -> Metric Ton Decigram -> Pound Decigram -> Ounce Decigram -> Stone Decigram -> Short Ton (US)Decigram -> Long Ton (UK)Decigram -> Grain Decigram -> Dram Decigram -> Carat Decigram -> Troy Ounce Decigram -> Troy Pound Decigram -> Pennyweight Decigram -> Scruple Decigram -> Slug Decigram -> Atomic Mass Unit Decigram -> Quintal Decigram -> Hundredweight (US)Decigram -> Hundredweight (UK)Decigram -> Centigram

About mass units

This category covers 26 mass units and every ordered conversion between them, which is 650 dedicated pages in total. The units included here are Kilogram (kg), Gram (g), Milligram (mg), Microgram (µg), Nanogram (ng), Picogram (pg), Metric Ton (t), Pound (lb), Ounce (oz), Stone (st), Short Ton (US) (ton), Long Ton (UK) (long ton), Grain (gr), Dram (dr), Carat (ct), Troy Ounce (oz t), Troy Pound (lb t), Pennyweight (dwt), Scruple (scr), Slug (slug), Atomic Mass Unit (u), Quintal (q), Hundredweight (US) (cwt), Hundredweight (UK) (cwt), Centigram (cg), Decigram (dg). Each unit is defined against a single canonical reference for the category, so a conversion between any two of them is carried out as two exact steps: the input value is first expressed in the reference unit, then re-expressed in the target unit. Routing every pair through one reference rather than storing a factor for each combination keeps the whole category internally consistent and means a correction to one definition propagates everywhere it is used.

Precision and rounding

Conversions are computed in double-precision floating point and displayed at the precision you choose, so the value shown is a rounded view of a more exact internal result rather than the result itself. Where a factor is defined exactly by treaty or standard, the arithmetic is exact to the limits of the representation; where a factor derives from a measured physical quantity, the trailing digits carry the uncertainty of the underlying measurement. For engineering and scientific work, carry the full precision through intermediate steps and round only the final figure, since rounding at each stage of a multi-step calculation accumulates error.

How to use this page

Pick any pair above to open its dedicated converter, which shows the formula, the exact factor, a table of common values and the source the definition is taken from. The search box filters the pair list by unit name or symbol, which is the quickest route when a category carries many closely named units. Every conversion is calculated in your browser, so pages continue to work offline once visited and no input value is ever sent to a server.