Why Your Calculator Result Differs From Canvas or Blackboard

1. Missing assignments treated differently

The most common source of mismatch is how ungraded or missing work is handled. A grade calculator only uses the information you provide. Canvas and Blackboard have different options:

• Treat as zero: Missing work pulls your percentage down immediately.
• Exclude from calculation: Your grade is calculated only from submitted work, making it appear higher than it will be once assignments close.
• Mark as excused: Specific assignments are removed from the total possible, which often raises the displayed percentage.

Instructors configure these settings, and the default varies by platform and term.

2. Dropped scores

Many instructors set their gradebook to automatically drop one or more lowest scores from a category — for example, the two lowest quizzes. A grade calculator that does not account for dropped scores will produce a lower result than the LMS because it includes all scores in the average.

3. Extra credit

Extra credit points are sometimes added outside the weighted category system. If an instructor adds 3 extra points directly to your final course total, a category-based calculator will not show that boost. The LMS gradebook may reflect it while your manual calculation does not.

4. Rounding differences

Grade calculators often round at the end of the calculation. LMS platforms may round at each step — rounding each assignment score before averaging, then rounding the category average before applying the weight. These intermediate rounding differences can accumulate into a noticeable gap.

5. Category weights not matching the syllabus

Instructors sometimes adjust category weights in the gradebook mid-semester. If the weights in Canvas do not exactly match what is written in the syllabus, both your LMS grade and a manual calculation based on the syllabus will differ from what the instructor actually uses.

6. Points-based vs category-based grading

Some classes appear to have category weights in the syllabus, but the instructor actually runs the gradebook on total points. In a total-points system, every assignment has a point value, and your grade is earned points divided by total possible points — no category weighting is applied. A weighted calculator will not replicate this accurately.

Related: how weighted grades work explains the difference between these two grading approaches.

What to do when the numbers do not match

1. Check whether all assignments have been graded and submitted.
2. Confirm the category weights match the syllabus exactly.
3. Look for dropped score rules, late penalties, or extra credit in the gradebook.
4. If the gap is more than a point or two, contact your instructor for clarification.

FAQ

Which grade should I trust — the LMS or my own calculation?

Neither is definitively correct without knowing your instructor's exact settings. Your instructor's gradebook configuration is the authoritative source. When in doubt, ask your instructor how grades are being calculated.

My Canvas grade is higher than my calculator result. Why?

The most common reasons Canvas shows a higher grade are: ungraded assignments are being treated as excused (excluded from the denominator), or extra credit has been applied. Some instructors also configure Canvas to show the grade you would have if you scored full points on missing work.

Can I ask my instructor to explain the gradebook settings?

Yes, and it is a reasonable question. Instructors set up gradebooks and sometimes the configuration does not match what students expect from reading the syllabus. A polite email asking how the current grade is calculated is appropriate.

Should I wait for all assignments to be graded before comparing?

Yes. Grade percentages fluctuate dramatically early in the semester when few assignments have been entered. The calculator result and the LMS grade will align most closely when most assignments have been graded and all weights are reflected.

This guide covers common scenarios. Your instructor’s gradebook configuration is the authoritative source for your grade. When in doubt, ask.