![Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine](https://th-thumbnailer.cdn-si-edu.com/ZQpT0bTmEktrL7suiej8AjSdHJA=/fit-in/1072x0/filters:focal(1000x942:1001x943)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/74/cb/74cb62a7-c67a-4a79-b80d-48ab564f2756/nist_4_watt_balance2.jpg)
Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine
![Au revoir to the original kilogram: Le Grand K joins the list of relegated metrics | Science | The Guardian Au revoir to the original kilogram: Le Grand K joins the list of relegated metrics | Science | The Guardian](https://i.guim.co.uk/img/media/9da3269adf2dbf516ab0836299f6990fb64d4462/1283_75_3115_1870/master/3115.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=dc14426b9ae4a905948e97037e3e0692)
Au revoir to the original kilogram: Le Grand K joins the list of relegated metrics | Science | The Guardian
![Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram](https://c8.alamy.com/zooms/6/e9155822c3fb4870a38ca4943d3dc6b9/r24ypn.jpg)
Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram
![Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram](https://c8.alamy.com/comp/R24YPP/brno-czech-republic-16th-nov-2018-the-platinum-and-iridium-alloy-cylinder-pictured-on-november-16-2018-at-the-czech-metrology-institute-in-brno-czech-republic-will-no-longer-be-a-kilogram-standard-representatives-of-individual-countries-at-the-international-bureau-of-weights-and-measures-bipm-conference-as-expected-have-decided-to-redefine-the-kilogram-and-other-basic-units-the-base-unit-of-mass-is-newly-derived-from-the-fixed-value-of-the-planck-constant-credit-igor-zehlctk-photoalamy-live-news-R24YPP.jpg)
Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram
![Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine](https://th-thumbnailer.cdn-si-edu.com/G5pI1UIJD3Xh03yRXV9gIc7uqWw=/1000x750/filters:no_upscale():focal(700x466:701x467)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/67/0c/670c8546-f486-42ba-a555-83c01c33dbd9/wattbalance_rsi_cover-1.jpg)
Scientists Are About to Redefine the Kilogram and Shake Up Our System of Measures | Science| Smithsonian Magazine
![This platinum-iridium cylinder at the National Bureau of Standards is the primary standard kilogram for all metric measurements of mass in this country. It was furnished to the US by the International This platinum-iridium cylinder at the National Bureau of Standards is the primary standard kilogram for all metric measurements of mass in this country. It was furnished to the US by the International](https://c8.alamy.com/comp/G15MA6/this-platinum-iridium-cylinder-at-the-national-bureau-of-standards-G15MA6.jpg)