Todd Helmenstine



B.A., Physics and Mathematics, Hastings College


  • Science writer and graphic designer
  • Specializes in periodic table printables and other graphics


Todd Helmenstine is a science writer and graphic designer, with expertise including physics, chemistry, and mathematics. His best-known work is his printable periodic table printables and other graphics, which have been featured on numerous educational websites, textbooks, journals, videos, and more.


Todd Helmenstine earned his bachelor's degrees in physics and mathematics from Hastings College in Hastings, Nebraska.

ThoughtCo and Dotdash

ThoughtCo is a premier reference site focusing on expert-created education content. We are one of the top-10 information sites in the world as rated by comScore, a leading Internet measurement company. Every month, more than 13 million readers seek answers to their questions on ThoughtCo.

For more than 20 years, Dotdash brands have been helping people find answers, solve problems, and get inspired. We are one of the top-20 largest content publishers on the Internet according to comScore, and reach more than 30% of the U.S. population monthly. Our brands collectively have won more than 20 industry awards in the last year alone, and recently Dotdash was named Publisher of the Year by Digiday, a leading industry publication.