The Risk Assessment Information System

RAIS Chemical Risk Calculator

Do you have a previously saved file?
(dated 2024-01-24 or newer)
File Number:
Do you want to use the same chemicals and chemical info type?

Using the Chemical Risk Calculator

Select Scenario









*Indoor worker includes industrial tap water

Select Media




Select Media


Select Media







Select Media





Select Media





Select Media




Select Media




Select Media






Select Media




Select Chemicals Data Source




Select RfD/RfC Type:



*Chronic selection will retrieve Chronic-only RfDs/RfCs; Subchronic selection will first retrieve subchronic values where possible and then use chronic values.

Select Chemicals of Interest



Or Select by Category














Select Metadata


Display Risk Output in Percentage


(Results are in seperate table. See User's Guide.)

Top of Page


Join the RAIS User's Group for Updates

Register