Convert a single course percentage into its letter grade on the built-in plus/minus scale — see that an 85 earns a B instantly. Free, local, no signup.
Content reviewed October 2026 · About Toolzum
Compute semester GPA from course grades and credit hours with credit-weighted math on the standard 4.0 scale — quick academic snapshot. See what straight B's earn — free, local, no signup.
Compute test percentages and grades from correct/total with curve options. Turn 42/50 into 84% (B) instantly — free, local, no signup.
Compute your overall course percentage from comma-separated assignment grades and their matching weights — Exam Heavy presets included. Numbers never leave your device — every calculation runs locally in your browser.
See any CIDR as binary maps — IP, mask, and network bits plus a 32-block network/host bar. Single-network rendering only, no sub-subnetting — local rendering, free, no signup.
Shrink JPG, PNG, and WebP photos with an Image Quality slider (10–100%, default 80%) plus a Resolution Scale slider, shown in Before/After panels with exact KB and -% savings. Single-image uploads up to 50MB — local library work, unlimited saves.
This tool does not solve for finals — it converts one finished percentage to its letter. Average or weight your work first, then enter the projected overall percentage to see the letter it earns.
Nothing to drop here — the tool takes a single percentage. Exclude dropped work while averaging yourself, then convert the result.
A at 93, A- 90, B+ 87, B 83, B- 80, C+ 77, C 73, C- 70, D+ 67, D 60, F below 60. Verify your school’s bands before trusting letters anywhere official.
No — math runs locally in your browser. Grades never leave your device.
Test Score Calculator
Compute test percentages and grades from correct/total with curve options. Turn 42/50 into 84% (B) instantly — free, local, no signup.
Final Grade Calculator
Compute your overall course percentage from comma-separated assignment grades and their matching weights — Exam Heavy presets included. Numbers never leave your device — every calculation runs locally in your browser.