A plain 4.0-scale GPA calculator treats an AP Calculus A the same as a regular English A — which is precisely the accuracy gap colleges point to when warning that generic GPA calculators don't capture course difficulty.
Weighted GPA calculator, Honors and AP/IB explicit
Mark any course as Honors (+0.5) or AP/IB (+1.0) and toggle "Weighted GPA" to see the difference — the common convention used here is stated plainly on the page, since schools vary in their exact bonus amounts and this tool doesn't pretend to match every one of them.
College GPA calculator, no signup required
Everything runs in your browser — no account, no email capture, and no server storing your grades, unlike some calculators that gate results behind registration.
Cumulative GPA calculator, combine with a previous term
Enter a previous GPA and credit total alongside new courses to see a combined cumulative GPA, rather than recalculating your entire history from scratch each term.