Difference between FCF and NPV

My question is, how is Free cash flow different from NPV calculation?
In both cases, we do the same things like calculating tax on EBIT and subtracting capital expenditure and adding decrease in net working capital and subtracting increase in net working capital and adding scrap value and depriciation. In the end, we discount it at the WACC to get the PV.
So what is the difference? I am a bit confused.