FWIW, I wouldn't rely on a calculator based on the price of the house -- that makes no sense, other than as the vaguest estimate of low-end vs. high-end finishes. You will likely get more info pricing things out piece by piece -- e.g., what level of replacement appliances are you looking at, how many linear feet of cabinets, how many square feet of countertop, etc. I mean, you can buy a stove for $100 or $10K, so you will get far more info from looking at the individual pieces than general estimates.
I would guesstimate that your figure is reasonable-but-tight for a contracted-out "replace in kind" kitchen remodel in a relatively newer home. (As comparison, both my mom and I recently got quotes in the low-$20Ks for bathroom remodels, neither of which was remotely fancy, and neither of which involved moving fixtures). Specific things that jack up the budget quickly:
1. Older house (need to bring things up to code, drop new electrical subpanel, re-wire or re-plumb certain areas, remove asbestos or lead-soldered pipes, etc. -- the downside risk of "you never know what you're going to get until you get in there" gets a lot worse the older the home is. Ask me how I know).
2. Moving plumbing lines.
3. Removing walls, especially if load-bearing.
4. Location and how busy your GC is (we are mid-Atlantic -- not DC, but not super-cheap either. Expect significant premiums in some parts of the country, discounts in others, based largely on availability and cost of labor).
You definitely have 2 and 3 going on here, so I'd take a sharper pencil to some of the numbers -- get a few quotes to see what kind of overhead/profit the GC will charge you and whether there are big issues to be aware of before you dive in (e.g., if your electrical panel is maxed out, that should be obvious right now; they may be able to make a reasonable guess whether the wall is loadbearing based on its orientation; etc.).
Also beware all of the extras that you don't even realize are options until you start shopping, like roll-out shelving, soft-close drawers, undercabinet lighting, glass door fronts, etc. etc. etc. -- once you start diving in, it's very easy to get lured into a lot of stuff you never even thought of beforehand. I would think Ikea would make it pretty easy to price out those kinds of options (regular cabinet companies love to play hide-the-ball so you don't really "see" the cost of all of those upgrades).
Finally, how long do you need this to last for? I spent more on cabinets because I expect my kitchen to last until I kick the bucket, so things like 1/2" particleboard and crappy joinery were right out. OTOH, if you are looking for 5-10 years, you are probably just fine.