1 Zmol (zettamole) is equal to 1,000,000,000,000,000,200,000,000,000,000,000,000 Pmol (petamole). To convert from zettamole to petamole, multiply by 1,000,000,000,000,000,000,000,000,000,000,000,000 or divide by 0.000000000000000000000000000000000001.