Why do you need to figure out each part separately? Graphics cards TDPs and power consumption are shown in reviews, same with CPUs. Hard drives are around 10 W, about 30 W for a motherboard, everything else is insignificant. You are much better off considering the power of the system as a whole than individual components.
^+1 couldn't agree more!
Any psu calculator i've seen in the last couple of years = BS
Most if not all are calibrated to upsell to more powerful units your specs don't require.
Hell i've used Corsairs and it recommends 850W+ for my specs which is ridiculous.
I have their HX-750 which is more then enough.
A 650W would run my specs btw.