Form calculations

If you are looking to perform calculations, please check this guide: https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget

If you want to do it based on conditions, please check this guide: https://www.jotform.com/help/268-How-to-Insert-Text-or-Calculation-into-a-Field-Using-Conditional-Logic

Let us know if you need more help, we will be glad to assist you.