Supplement Budget Calculator

This calculator is arithmetic for a supplement shelf: it totals what you spend, splits the total into essential and optional buckets, and computes how much trimming the optional bucket could save. Total Monthly Cost is simply the supplement count times the average cost per supplement, and because the two multiply symmetrically, a ten percent change in either moves the total by exactly the same amount — neither one is the lever, they are the same lever. Essential Cost counts only the supplements you flagged non-negotiable (capped at your total count, so entering more essentials than supplements does not invent spending), and Optional Cost is whatever remains. Potential Savings answers a narrower question than it first appears: it is the amount you are over budget, capped at the size of the optional bucket.

If you are $20 over a $100 limit with $60 of optional spending, it reports $20 — the cut needed, not the whole optional pool. If you are under budget it reports exactly zero; the tool never suggests banking headroom. Raising your Essential Supplements count shifts spending between the two buckets without changing the total at all. Assumptions to know: every supplement is priced at the same average, and the budget check is monthly with no annualization.