Nuclides
About the app ↗
Activity converter
Convert Bq, Ci, MBq, mCi, μCi and more.
Open activity converter →Nuclides web tools
Nuclear science tools, ready in your browser.
Explore the periodic table and element properties, convert activity units, calculate decay, or look up an isotope. Free to use, with no account required.
Decay calculator
Calculate remaining activity, initial activity or time to a target.
Open decay calculator →Nuclide lookup
Search half-lives, decay modes, isotopes and metastable states.
Open nuclide lookup →Periodic table
Explore all 118 elements by category, physical state, name or atomic number.
Open periodic table →Element reference
Find atomic weights, electron configurations, density and thermal properties.
Open element reference →From a lookup to a calculation
Find a nuclide, open its half-life directly in the decay calculator, then convert activity to the unit you need. Each tool has its own link so you can bookmark it for your next task.
Calculations and searches run in your browser. The basic reference snapshot is downloaded when needed; no installation is required.
Take your reference with you
Keep Nuclides on your phone.
Explore decay chains, radiation energies and connected references in the app. Bundled reference data works offline; online resources need a connection. Check each store for pricing and in-app purchases.
