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Brainlag

Grade calculator

Enter your marks and how much each is worth to see your weighted average and the score you need on what is left. For school, college and university courses; a GPA view is included.

    Total

    Formulas

    Weighted average(score₁ × weight₁ + score₂ × weight₂ + ...) / (weight₁ + weight₂ + ...)
    Score you need(target × total weight − points so far) / weight still to come

    Worked example

    Coursework is 40% of your grade and you scored 72. The exam is the other 60%. What do you need in the exam for 80 overall?

    1. Points so far: 72 × 0.4 = 28.8.
    2. For 80 overall you need 80 × 1 = 80 points in total.
    3. The exam has to bring 80 − 28.8 = 51.2 points, and it is worth 0.6.
    4. 51.2 / 0.6 = 85.3.

    Answer: About 85.3 in the exam.

    Common mistakes

    • Averaging the scores without their weights: 72 and 90 average to 81, but with weights of 40% and 60% the result is 82.8.
    • Using weights that do not add up to 100%.
    • Mixing scales, such as a mark out of 30 with a percentage: turn every score into a percentage first.

    How it works

    Grade Tracker works out your weighted average for each subject and tells you the score you need on the rest of the course to reach a target grade. Enter each assessment with its score and weight, and the numbers update as you type.

    1. Pick Course grade, choose or add a subject, and enter each assessment with its score and weight in percent.
    2. The current average uses only the marks you have, so it is right halfway through a term.
    3. Type a target grade to see the score you need on the weight that is left, with the working.
    4. For a GPA, switch to GPA and list each class with its grade (a letter or a percentage), credits and type.
    5. Add your earlier GPA and credits to get a cumulative GPA.

    Tips

    • To work out what you need on a final: take your target, subtract score x weight for each finished assessment, then divide by the final's weight. Example: 72% on half the course, target 70%, final worth 50%: (70 - 36) / 0.5 = 68% needed.
    • Copy the weights from your syllabus, not from memory.
    • If the target is out of reach even with 100%, lower it and spend your revision time where the weight is biggest.
    • Once you know the score you need, press Plan revision for this to take that subject and target over to the Revision planner.

    FAQ

    How is the weighted average calculated?
    Each score is multiplied by its weight, the results are added up, and the total is divided by the sum of the weights you have entered. Rows without a score are left out.
    Can I track more than one class?
    Yes. Add as many subjects as you like and switch between them with the tabs. Each subject keeps its own assessments and target grade.
    Where are my grades saved?
    In this browser's local storage on this device, automatically as you type. Nothing is uploaded unless you sign in to an optional free Brainlag account, which syncs it across devices. Clearing your browser data deletes your grades. What-if sliders are only a preview and are not saved.
    How is the weighted GPA worked out?
    On the usual 4.0 scale, Honors classes add 0.5 and AP or IB classes add 1.0 to the grade points, up to 5.0, before dividing by the credits. Schools differ, so check your school's rules.

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