All calculators
Every tool on this site does one job and shows its arithmetic while doing it. The list below is sorted by the kind of question each one answers, and every card links the guide that works the same math by hand, with a real example and a source for whatever convention it leans on. Nothing you type leaves your browser.
The full list
All 31 calculators on SyllabusCalc, sorted by category: Course grades (10), GPA (7), Converters (3), Standing (1), Teacher tools (2), International (8). Each card links the calculator, and the line under it opens the guide that works the same math by hand.
Course grades
- Attendance Grade Calculator
What attendance does to your grade under either common policy: a weighted attendance category, or per-absence penalties with a free allowance.
- Exam Curve Calculator
Your exam score under the square root curve, a flat add, highest-to-100, scale-to-top, and a mean shift, side by side with each convention explained.
- Extra Credit Calculator
What extra credit is actually worth: points inside a weighted category are diluted by that category's weight, points on the total are not.
- Final Grade Calculator
What you need on the final to hit a target grade, with honest not-reachable and already-secured states and a full letter ladder.
- Grade Calculator
Average assignment scores by total points or as equal percents. Both answers shown, because syllabi genuinely differ on which one your grade uses.
- Grade Needed Calculator
You have an average over part of the course. Find the average you need on everything left to reach a target, with honest impossible and secured states.
- Late Penalty Calculator
What a late penalty leaves you: points off the maximum or percent off your score, day by day, and what the late work is still worth in your course grade.
- Semester Grade Calculator
Combine two terms and a final exam under editable weights, or flip the mode and solve for the final score a target semester grade requires.
- Test Average Calculator
Average any list of test scores, with a transparent drop-the-lowest mode that shows exactly which scores were dropped and what the drop was worth.
- Weighted Grade Calculator
Average category grades under syllabus weights, with honest handling when weights do not total 100 and a worst-case floor for the missing share.
GPA
- College GPA Calculator
Semester GPA from letters and credit hours, plus the cumulative GPA after the term from prior GPA and credits, with the dilution math shown honestly.
- Cumulative GPA Calculator
Combine term GPAs into a cumulative, or solve for the exact next-term GPA a target requires, with honest not-reachable and secured states.
- GPA Calculator
Credit-weighted GPA on the standard 4.0 ladder or your school's own letter-to-points table, with quality points shown and honest rounding.
- GPA Calculator (4.33 Scale)
Credit-weighted GPA on the 4.33 scale, where an A+ earns 4.33. Defaults to the published Canadian ladder, and every value is editable.
- High School GPA Calculator
Weighted and unweighted high school GPA side by side, with editable honors and AP bumps and the schools-differ truth stated up front.
- Pass/Fail Impact Calculator
The same course both ways: your GPA graded versus shielded behind a P, the break-even letter, and the F fine print schools genuinely differ on.
- Raise My GPA Planner
How many terms of 3.5 or 4.0 work a target GPA takes, with honest not-reachable rows when the target sits above what you plan to average.
Converters
- Letter Grade to GPA
Convert any letter grade to grade points on the standard 4.0 scale and the 4.33 Canadian convention, side by side, with both ladders in full.
- Percentage to GPA
Percent to GPA points and back, on an editable banded table, with the same score shown on two real published scales that disagree.
- Percentage to Letter Grade
Convert a percent score to a letter on an editable plus-minus scale, with exact comparisons and no hidden rounding.
Standing
- Class Rank Calculator
Turn a class rank into top percent and percentile, or find which ranks make a top-5, 6, 10, or 25 percent line, with the conventions stated plainly.
Teacher tools
- Curve Applier
Apply a flat, multiplier, top-to-100, square-root, or target-mean curve to a whole roster, with per-student deltas and honest refusals.
- Gradebook Average Calculator
Paste a roster of scores for the mean, median, high, low, standard deviation, and a letter distribution on an editable scale. Nothing leaves the page.
International
- Australian GPA and WAM Calculator
A 7-point GPA and a weighted average mark from one course list, on an editable grade table, with the two published conventions for a failing grade compared.
- CAO Points Calculator (Leaving Cert)
Leaving Certificate CAO points on the common points scale: your six best results, the Higher Maths bonus only when it counts, LCVP and Foundation Maths.
- CGPA to Percentage Calculator (India)
An Indian CGPA to a percentage under each university's own published formula, with VTU and Pune side by side and the degree class each reading earns.
- Canadian GPA Calculator (Percent to 4.0)
Percentage marks and credits to letters and a 4.0 GPA on the University of Toronto and McGill tables side by side, with McGill's two-decimal truncation rule shown.
- ECTS Grade Conversion Calculator
Convert a grade between two ECTS grading tables by position, with the minimum, average and maximum readings the ECTS Users' Guide leaves to the receiving school.
- German Grade Calculator (Bavarian Formula)
A foreign grade on the German 1.0 to 4.0 scale by the modified Bavarian formula, read under all four finishing rules German universities publish.
- R Score Calculator (Quebec Cote R)
A Quebec CEGEP R score (cote R) on the published formula, from your grade and your group's numbers, then the unit-weighted average with the failure weights.
- UK Degree Classification Calculator
Turn UK module marks and credits into a degree class: credit-weighted year averages, editable year weights, and three borderline rules universities publish.
Which one do I want
- A grade in one course. Start with the grade calculator if you have categories and weights, or the final grade calculator if the only unknown left is the final.
- A GPA across courses. Use the GPA calculator for one term, the cumulative GPA calculator to fold a term into a record, and the raise my GPA planner to see what a target actually costs.
- A conversion. The percent to letter, letter to GPA and percent to GPA tools all keep their tables editable, because no two schools publish the same one.
- Something a teacher needs. The curve applier and gradebook average calculator work on a whole roster at once.
If you are not sure which tool matches your syllabus, the guides explain the underlying math in plain English, and the glossary defines the vocabulary a syllabus uses.