Kitchen floor not level, fitting units

The legs are adjustable, simply turn them....and sling out the packers.

forgot to add, you can cut down the plinths accordingly, don't forget, the top inch or so of them is usually out of sight.

You must have the worktops level. It'll look awful - and things will roll off - if you don't.

The *actual* level will depend on what is to go under and/or alongside them. For example, I set mine level with the ceramic hob on the free-standing cooker. The levels (in my case) were then such that there was plenty of room to get the dishwasher and fridge under the worktop on the other side of the kitchen.

As others have said, the base units probably have adjustable legs, and have probably been supplied with over-size plinths which you simply cut down (tapered if necessary!) to fit.

You should certainly arrange things so that the worktops are level. If you don't all kinds of obvious and less obvious skews will happen and in places where they are in clear view. It is certainly worth spending time to get everything perfectly level.

If you have legs on the cabinets or can fix them, you can turn them to adjust for this kind of discrepancy easily.

It is also important to check carefully the height under the worktops, specifically to make sure that it is enough for appliances. This should be done at the high point of the floor because the total height at the low point will be more. Do it the other way and things may not fit.

The plinths are not likely to be noticable unless you crawl around on hands and knees.

No legs on these units, cheap jobbies from Stax. Chipboard all the way to the ground. I'd have probably been better buying some legs the amount of packing up I'm doing.

I presume, in that case, that you are starting at the highest point and levelling everything else UP to that

Yep

Given that the packing is likely to compress or split, I think that you would be better off fitting legs now and adjusting properly. It would be a better job and you will save time. They are not expensive.