How to add calculations to your form

[@lakergreat1]

how can I combine two text fields, into one? ie. Field 1 is completed, Field 2 is Completed and Field 3 is the joining of data of field 1 + field 2?

[@fillout]

Hi there, take a look at calculations: www.fillout.com/help/calculations
You can create a "text" calculation to accomplish this. Let us know if you have any questions!

[@lakergreat1]

how could I find the age of someone if they choose the date, and vice versa - how could I fill out date if someone filled out their age?

[@fillout]

Fillout now has "duration" calculations - should work for exactly that use case!