can you convert nanofarad (nF) to nanocoulomb (nC)?

Nanofarad (nF) is the SI unit of electrical capacitance, while nonocoulomb (nC) is the SI unit of electric charge. The units of two different physical quantities cannot be directly convert to each other. Furthermore, 1 nF = 1 nC/V, where V stands for voltage.

However, if nF means nonafaraday, then 1 nF ≈ 96485 nC.

not without more information.  You need voltage value.

the formula is Q = CV
charge in coulombs = capacitance in farads x voltage in volts.

or
charge in nC = capacitance in nF x voltage in volts.