The number of treatments needed depend on the tattoo itself, the area of the body and the background skin color.
Location matters: The closer the tattoo is to the heart the better circulation, therefore better results. More colorful tattoos and greater surface area usually require more treatments. Amateur tattoos are typically not as deep as professional ones, and can be removed in as few as 2 treatments.
For the most accurate estimate of sessions, consult your practitioner for each tattoo.