1 fF (Femtofarad) is equal to 0.000000000000000000000000000000000000001 YF (Yottafarad). To convert from Femtofarad to Yottafarad, multiply by 0.000000000000000000000000000000000000001 or divide by 1,000,000,000,000,000,100,000,000,000,000,000,000,000.