This article presents a new measure of available time specific to fostering, the Available Time Scale (ATS). It was tested with a national sample of 304 foster mothers and is designed to measure the amount of time foster parents are able to devote to fostering activities. The ATS has excellent reliability, and good support exists for its validity. The ATS was associated with number of years fostered, number of children fostered, and intention to continue fostering. Furthermore, it was related to desirable parenting behaviors for the general well-being and development of children in foster care; and children in foster care's behavioral, emotional, and cultural needs.