How much coolant do I need...?

[atomicus]

I am buying a pre-mix (Mayhems Clear Blue UV), not sure if I need 1l or 2l. My loop consists of the following...

 

x2 HW Labs Black Ice Nemesis 360 GTS rads (these are the thinner ones, 29.6mm.

x1 EKWB 1080 water block

x1 EKWB X99 EVO CPU block

PETG tubing

 

I'm guessing there is a margin for error here given how much tubing I need.

[Taswell]

I would get 2L so can drink some and don't have to worry about not having enough.

 

( 1L should be good to refill it a couple times. I get it by the gallon. one of those will refill my loop 4-5 times)

[atomicus]

Well as long as 1l is enough to fill it once, as I have one already, but wasn't sure if I need another before I fill for first time. Wouldn't want to have it only half filled.

[it_dont_work]

Just get 2lt, just in case 1lt isn't enough, or you spill something, or there's a leak and you need to drain and refill. Having some to top up isn't going to hurt anything.

[THFourteen]

I filled my loop (CPU plus GPU block, 150ml res and 120mm 45 + 280mm 30 rads) and it took about 500ml of distilled water 

[atomicus]

I forgot to mention (quite crucially) I have the EX-XRES 140 Revo which has a 205ml free volume capacity.