THE NUMBERS, EXPLAINED
How to use this calculator.
The current average is normalised over completed work, which carries all weight outside the final exam. No grading curve or institutional rounding policy is assumed.
Start with your inputs
Enter current average excluding final (%), final exam weight (%), target course grade (%). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Current average excluding final (%) | 70 |
| Final exam weight (%) | 40 |
| Target course grade (%) | 80 |
A worked example
With the example inputs above, required final exam (%) is 95. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Required final exam (%) | 95 |
| Feasibility | Attainable within 0–100% |
How this is calculated
Required final exam (%)
(c − a × (1−b/100)) / (b/100).
Feasibility
A required score ≤0 is already secured at zero; above 100 is unattainable within the stated scale; otherwise it is attainable.
Symbols and units
- a
- Current average excluding final (%)
- b
- Final exam weight (%)
- c
- Target course grade (%)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
The current average is normalised over completed work, which carries all weight outside the final exam. No grading curve or institutional rounding policy is assumed.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Required final exam (%); Feasibility. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: The current average is normalised over completed work, which carries all weight outside the final exam. No grading curve or institutional rounding policy is assumed.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: algebra and proportional reasoning ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →