CapstoneCalcEvery grade calculator a student needs
What's New
This site is maintained rather than published once and left alone. Everything below shipped on the date shown.
Free study resources for 13 subjects
The site could tell you that you need 94% on the final and then had nothing to say about how to get it. This fills that gap: a hand-written page for each of 13 college subjects covering where that specific course loses students marks — stoichiometry in chemistry, the algebra underneath the calculus, the gap between recognising and recalling in biology — followed by free courses, open textbooks and video channels, each annotated with when to reach for it rather than what it is. Three study plans per subject depending on whether you have a term, a week or one night. Every one of the 49 links was checked to resolve before shipping; nothing listed costs money and nothing is an affiliate link.
Content differentiation pass
The programmatic pages shared too much furniture: the same six tips and six FAQs recycled across 208 calculator pages, which made them read as one page printed many times. Tips went from 6 to 16 and FAQs from 6 to 13, both drawn per page so neighbouring pages no longer match. A guides section was added at the same time — four long-form articles on grading systems, the 89.5 rounding problem, finals-week triage and how GPA scales compare.
CapstoneCalc rebuilt as a full calculator suite
The site had been a single-page final-grade calculator. It was rebuilt as a 217-page suite: what you need on the final at every exam weight, weighted category grades, test averages, GPA on the 4.0 scale, and direct answers to score questions like "what grade is 42 out of 50?". Every calculator runs in the browser with no account and nothing stored. A build-time gate shipped with it that recomputes the arithmetic on every generated page and fails the deploy if any published number is wrong.
How the numbers stay right
Every deploy runs a gate before it ships. The gate recomputes the arithmetic on each of the 187 generated calculator pages and compares it against what the page actually says — percentage, letter grade and the score needed on the final at every exam weight. It also checks that no two pages share a title, that no page falls below its word floor, and that every outbound study link is well formed and carries a note explaining when to use it. If any check fails the deploy is blocked rather than published, which is the only guarantee worth making on a site whose entire job is arithmetic.
The published formula is on the home page so you can check us: needed = (target − current × (1 − weight)) ÷ weight. If a number here ever disagrees with your syllabus, your syllabus wins — tell us and we will fix the page.