All Tools

Every free tool on Student Toolbox — GPA calculators, grade calculators, graders and countdowns. All work right in your browser, no sign-up needed.

Convert percentage, 10-point CGPA, 7-point, 4.3 and 5.0 scales to the 4.0 GPA scale.

University of Florida GPA — UF's 1/3-point scale, no A+, E for failing.

Arizona State GPA — A+ = 4.33 (capped 4.0), no C-/D+/D-.

Purdue University GPA — 0.3-point scale where A+ = A = 4.0.

Add courses, letter grades and credits to get your semester GPA instantly.

Combine your previous GPA and credits with this semester to see your overall GPA.

Honors and AP/IB weighting on the 5.0 scale — weighted and unweighted GPA together.

Convert any letter grade to grade points on the 4.0 scale, with the full reference table.

What do you need on the final to hit your target grade? Simple and weighted modes.

Grade a test in seconds: total questions + wrong answers = percentage and letter grade.

Estimate your GCSE grade on the 9–1 scale from marks or percentage.

How many days until Christmas? Live countdown that rolls over to next year automatically.

Count down to any date — exams, trips, deadlines, holidays. Shareable links included.

Guides

Understand the math behind the tools — GPA conversion, final exam formulas, and holiday countdowns.