Enrichment SWU calculator

Use this to calculate how much natural uranium and separative work you need to get a given amount of enriched uranium at a certain enrichment, and so on. Learn more about isotopes here.

Tails assay (wt %)

Feed assay (wt %)


Economics inputs:



  • U - Uranium
  • HM - Heavy Metal (e.g. Uranium, Neptunium, Pu, Cm, etc.)
  • kWh - Kilowatt-hour electric
  • MWh - Megawatt-hour electric
  • MWd - Megawatt-day thermal
  • SWU - Separative Work Unit