How much ground celery equals a stalk of celery?

One stalk of celery typically equates to about 1/4 to 1/3 cup of chopped celery. When ground, celery can vary in density, but generally, around 1 tablespoon of ground celery is roughly equivalent to one stalk. It's important to adjust based on the specific recipe and desired flavor intensity, as ground celery can have a stronger taste than fresh.