Animal Hospital Sanity Calculator

The tool answers exactly one question: if this shift plays out roughly the way you expect, will you still be standing at the end of it? You supply three things — your starting Sanity, the threats you think you will run into, and the recovery items you plan to carry — and it returns a single estimated ending value plus a verdict.

The arithmetic is intentionally transparent. Every threat you tick adds a fixed drain, every item you carry adds a fixed recovery amount multiplied by how many you bring, and the two are netted against your starting value. The result is then held inside the normal bounds of the Sanity scale, so it can never read as below empty or above full. If you have enabled the Psychologist option, all recovery is doubled before it is added — which is the same class behaviour you would experience in-game, just applied ahead of time.

• Do not plan to pass by a hair. A prediction that leaves you a sliver above the threshold means a single extra drain you did not tick flips the shift into a blackout. Treat any narrow margin as a failure of planning, not a success.
• Recovery beyond full is wasted. Because the result is capped at the top of the scale, overfilling on items you will never get to use is points and money thrown away. Bring enough, then stop.
• The verdict is a floor, not a promise. The tool cannot know that you will get caught out by something you did not anticipate. Use it to find the shifts that are obviously doomed before you queue into them.

Not all drains are equal, and the ones that ruin shifts are the sustained ones rather than the dramatic ones. Prolonged contact with a stalking anomaly and standing inside a Bed Monster red zone both outweigh a single fright, because the drain is measured across the whole shift rather than as a one-off hit. Meanwhile the quiet costs — a fire you put out, the stress of an ambulance rush, a glance at a cursed feed or a static photograph — look trivial individually but stack into a meaningful chunk if you do not notice them.

On the recovery side, the trade-off is density versus volume. Chocolate gives the most back per use but is hard-capped, so it is a burst resource rather than a plan. Coffee is the dependable bulk option you can actually stack. Mint tea is the cheap filler that closes a small gap without overcommitting. Choosing between them is the real decision the calculator is helping you make — see the coffee and food guide for the buy order.