Grade Calculator

The Grade Calculator is a free online tool that calculate weighted course grades from assignments and exams, figure out the final exam score you need, and customize letter grade scales.. It runs entirely in your browser with no installation or sign-up needed.

Each assignment percentage is multiplied by its weight, summed, and divided by total weight. E.g., 90% on a 40%-weight midterm contributes 36 points.

Use the Final Grade Needed tab: enter current grade, final weight, and target. The tool shows the exact score plus min/max possible.

Yes. Edit every letter band min/max percentage. Defaults use US plus/minus scale (A+ 97-100, A 93-96, A- 90-92, etc.).

Yes, the Grade Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Grade Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Grade Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Grade Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Grade Calculator uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

An unweighted average treats every assignment as equally important: you add up all the percentages and divide by how many there are. A weighted grade reflects how much each category actually counts toward your final mark, so a final exam worth 30% influences the result far more than a single homework worth 5%. The math differs too — instead of a simple mean, each assignment's percentage is multiplied by its weight, the products are summed, and the total is divided by the combined weight. That is why two students with identical assignment scores can end up with different course grades if their syllabi weight categories differently. Use the Weighted Grade tab to enter each item's score, maximum, and weight, and the calculator returns the correctly weighted percentage and matching letter grade instantly.

Weights often fall short of 100% mid-semester because some categories simply haven't happened yet — a final exam or a late project still hasn't been graded, so its weight isn't counted. They can also exceed 100% if a syllabus is entered with a typo or if extra-credit categories are included. Either way, a naive calculation would punish you: dividing by a fixed 100 when only 70% of the course has been graded makes your average look far lower than it really is. This tool flags when your weights don't total 100% and then normalizes the result by dividing your earned points by the actual weight present, giving a fair running average. Enter only the assignments you have so far and read the normalized percentage to see where you genuinely stand right now.

Sometimes yes, sometimes no — it depends entirely on how much the final is worth and how low your current grade is. The most a final can move your course total is equal to its weight. If the final counts for 30% and you currently sit at 50%, acing it lifts you to about 65%, because 70% of your grade is already locked in. If the final is worth only 15%, a perfect score adds far less. The Final Grade Needed tab makes this concrete by showing your maximum possible grade if you score 100 and your minimum if you score zero. Those two bounds reveal instantly whether your target is still reachable or already out of reach, so you can plan realistically instead of guessing the night before.

A letter grade describes how you did in one course — A, B+, C-, and so on — by mapping your percentage to a band on a grading scale. A GPA, or grade point average, condenses your letter grades across many courses into a single number, usually on a 4.0 scale where an A equals 4.0, a B equals 3.0, and pluses and minuses shift the value by roughly 0.3. So a letter grade is per-course while a GPA is cumulative, and converting between them requires knowing your school's specific point values. This Grade Calculator focuses on the percentage-to-letter step for individual courses and lets you customize every cutoff. Once you know each course's letter, you can carry those into our separate GPA Calculator to compute your overall average across a term or degree.

There is no national grading standard, so each institution sets its own cutoffs. One school may call 90% an A-, another may call it a flat A, and some skip plus and minus grades entirely, using only whole letters with wider bands. Universities, high schools, and individual instructors can all define their thresholds differently, and some courses are even curved so the same raw percentage maps to a different letter than the syllabus suggests. That is why a number alone never tells the whole story without the scale behind it. The Grade Scale tab lets you edit the minimum and maximum percentage for every band to match your institution's exact policy. Once set, both the weighted-grade letter and the percentage lookup follow your custom scale, so you see the letter your school would actually award.