Science, Tech, Math › Science How to Convert Angstroms to Nanometers Worked Unit Conversion Example Problem Share Flipboard Email Print Angstroms and nanometers are two common units used for the wavelength of light. John Lund / Getty Images Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated March 05, 2019 This example problem demonstrates how to convert angstroms to nanometers. Angstroms (Å) and nanometers (nm) are both linear measurements used to express extremely small distances. Problem The spectra of the element mercury have a bright green line with a wavelength of 5460.47 Å. What is the wavelength of this light in nanometers? Solution 1 Å = 10-10 m1 nm = 10-9 mSet up the conversion so the desired unit will be canceled out. In this case, we want nanometers to be the remaining unit.wavelength in nm = (wavelength in Å) x (10-10 m/1 Å) x (1 nm/10-9 m)wavelength in nm = (wavelength in Å) x (10-10/10-9 nm/Å)wavelength in nm = (wavelength in Å) x (10-1) nm/Å)wavelength in nm = (5460.47/10) nmwavelength in nm = 546.047 nm Answer The green line in mercury's spectra has a wavelength of 546.047 nm. It may be easier to remember there are 10 angstroms in 1 nanometer. This would mean that 1 angstrom is a tenth of a nanometer and a conversion from angstroms to nanometers would mean moving the decimal place one position to the left. Remember to check your significant figures when reporting measurements. In science, even if you do the calculation correctly, your answer is technically incorrect if not reported using significant digits.