The math your syllabus is doing
Grade calculators that answer the questions students actually type — what do I need on the final, what letter is an 89.5, what happens to my average — with exact arithmetic, honest edge cases, and scales you can edit to match your own course.
31 calculators and 34 guides. Nothing you type leaves your browser, and nothing you type is written into the page address.
| Current grade | 88% |
|---|---|
| Final exam weight | 20% |
| Desired course grade | 90% |
| You need on the final | 98% |
(90 − 88 × 0.80) ÷ 0.20 = 98
Start here: grading rules we compared ourselves
Published grading rules, worked through with the same numbers. The newest guides follow below, and the guide index lists every one.
- One CGPA, two official percentages
A CGPA of 8.00 is 72.50 percent at VTU and 71.20 at Pune. Why India has no single conversion formula, and what the two official ones actually say.
- One Italian 30 cum laude, three possible French grades
An Italian 30 cum laude reads 15, 17 or 19 at Rouen, depending on the rule. How ECTS grading tables convert a grade by position, worked on published tables.
- One French 13, four German grades
On TUM's French values a 13 converts to exactly 2.875 under the modified Bavarian formula. Four finishing rules German offices publish make it 2.7, 2.8, 2.9 or 3.0.
- How a 77 outranks an 88 in the R score
In BCI's own worked example a 77 gets an R score of 32.91 and an 88 gets 32.39. The formula, the group corrections and the failure weights, worked by hand.
- The same marks, a 3.000 in Toronto and a 3.150 at McGill
Four marks run through the University of Toronto and McGill grade tables: 3.000 and 3.150 from identical courses, plus McGill's rule that 3.596 shows as 3.59.
- What actually decides a UK degree class
One transcript, three published weightings and three published borderline rules: how a 2:2 and a 2:1 come out of the same marks, with the sources quoted.
- One transcript, a GPA of 4.167 and a WAM of 58
One published Australian transcript, run through the 7-point GPA formula and through the weighted average mark formula: 4.167 and exactly 58, and no way across.
Latest guides
The newest guides, each beside the calculator it explains. The guide index lists every one.
- The 34-point drop below an H6 in Maths
On the CAO scale an H6 in Higher Maths is worth 71 and an H7 is worth 37. The bonus rule, when it adds less than 25, Foundation Maths and LCVP, worked by hand.
- What does a late penalty really cost?
Ten percent per day late can mean points off the maximum or percent off your score. What each leaves, day by day, and what late work still adds to a course grade.
- What is extra credit actually worth?
Extra credit inside a weighted category is diluted by that category's weight: 5 points in a 20% category is 1.0 of final grade. The arithmetic, both ways.
- What do I need to pass?
The passing line is 60, 65, or 70 depending on the system, and each 5-point difference swings the needed final score by 25 at a 20% weight. Sourced and worked.
- What do I need to get an A?
The needed-final-score ladder for an A at nine current-grade and weight combinations, the entry tickets that decide when an A is still alive, and honest math.
- Weighted vs unweighted GPA
Weighted and unweighted GPA computed on one transcript: what the bumps add, why 4.5 and 5.0 scales don't compare, and which number colleges actually read.
Guides that stand on their own
Longer reads that are not tied to one calculator; every calculator also links a guide that works its math. See all 34 guides.
- How Final Exams Change Your Grade
The ceiling, the floor, and the per-point leverage of a final at every weight — and the weights where a target is simply out of reach.
- Does an 89.5 Round Up?
It is policy, not arithmetic. Real universities publish rules on both sides, quoted here, with the half point priced in final-exam terms.
- Weighted vs Unweighted GPA
Both ladders computed on one transcript, the ranking traps weighting creates, and which number colleges actually read.
- How Colleges Recalculate Your GPA
One transcript, four true GPAs: UC's capped-honors formula and UGA's core-course recalculation, worked with sources.
- Credit Hours, Explained
The federal definition, the workweek a 15-credit term implies, and why credits decide how far any grade moves your GPA.
- What Do I Need to Get an A?
The needed-score ladder for an A across nine current-grade and weight combinations, and the entry tickets that decide when an A is still alive.
- What Do I Need to Pass?
The passing line is 60, 65, or 70 depending on the system — and each 5-point difference swings the needed final score by 25 at a 20 percent weight.
All 31 calculators, by task
Every calculator on the site is below. See all 31 tools, sorted by category, each with a guide.
A grade in one course
What you need on the final to hit a target grade, with honest not-reachable and already-secured states and a full letter ladder.
Average category grades under syllabus weights, with honest handling when weights do not total 100 and a worst-case floor for the missing share.
Average assignment scores by total points or as equal percents. Both answers shown, because syllabi genuinely differ on which one your grade uses.
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.
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.
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.
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.
What attendance does to your grade under either common policy: a weighted attendance category, or per-absence penalties with a free allowance.
What extra credit is actually worth: points inside a weighted category are diluted by that category's weight, points on the total are not.
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.
A GPA across courses
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.
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.
Weighted and unweighted high school GPA side by side, with editable honors and AP bumps and the schools-differ truth stated up front.
Combine term GPAs into a cumulative, or solve for the exact next-term GPA a target requires, with honest not-reachable and secured states.
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.
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.
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.
Converting a grade
Convert a percent score to a letter on an editable plus-minus scale, with exact comparisons and no hidden rounding.
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.
Percent to GPA points and back, on an editable banded table, with the same score shown on two real published scales that disagree.
Grades from another country
Turn UK module marks and credits into a degree class: credit-weighted year averages, editable year weights, and three borderline rules universities publish.
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.
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.
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.
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.
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.
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.
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. Added Oct 13, 2026
Class standing
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.
For teachers
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.
Apply a flat, multiplier, top-to-100, square-root, or target-mean curve to a whole roster, with per-student deltas and honest refusals.
How the math is checked
The math is verified. Every calculator ships with an independent test suite that re-derives its outputs — 8,659 checks across 34 suites, listed one by one, run before anything is published.
- Edge cases are answered honestly. When a target grade is out of reach, the tool says "not reachable" instead of printing 144% as if it were advice. When a grade is already banked, it says that too.
- Your syllabus wins. Grading scales differ by school, so scales here are editable defaults, never hard-coded "standards."
- Calculator, not counselor. These pages do arithmetic. Policy questions — rounding, standing, scholarships — belong to your instructor and registrar, and every page says so.