OpusDesk Hub What this tool does
Find the score needed on remaining work to reach a target overall percentage. Enter your own assessment details and inspect the calculation behind the result.
How to use Required Marks Calculator
- Enter the completed average. Use the percentage average on completed work, the remaining assessment weight and your desired overall percentage.
- Optionally enter exam marks. Supply the assessment maximum and allowed increment for a minimum attainable mark. For example, choose 1 for whole marks or 0.5 for half marks.
- Review feasibility and formula. Inspect the weighted formula and upward rounding. Requirements above 100% and increments beyond the maximum are flagged as impossible.
How this tool works
With remaining fraction w = weight / 100, required percentage = (target − completed average × (1 − w)) / w. Non-positive requirements become zero; results over 100% are impossible. Minimum marks = ceil(raw marks / increment) × increment. Zero remaining weight is handled separately.
- Engine: Weighted-average algebra with rational arithmetic for upward mark increments
- Supported input: completed-work average, remaining weight and target percentages from 0 to 100, optional positive assessment maximum and mark increment
- Output: required percentage or minimum marks, feasibility and formula
Worked example
Input: Completed average 65%, remaining weight 40%, target 70%, exam out of 80, whole marks
Output: (70 − 65 × 0.6) / 0.4 = 77.5%; 77.5% of 80 = 62 marks, producing 70% overall.
Limits, edge cases, and troubleshooting
Plan a remaining exam using the completed-work average rather than mistaking already-weighted contribution points for that average.
- An assessment is modeled as one remaining component.
- Maximum marks and increments must be positive, finite and within supported arithmetic bounds.
- Separate assessment pass marks, moderation and extra credit are not modeled.
- Allowed scores are multiples of the chosen increment from zero; choose the increment that matches your assessment.
When to use another workflow
Consult the official assessment scheme where final grades use non-linear rules, minimum component scores or moderation.
| Option | Best for | Trade-off |
|---|---|---|
| This browser tool | Quick, private, one-off work | Limited by browser memory and the documented feature set |
| Desktop or command-line tool | Batch jobs and repeatable automation | Requires installation and setup |
Verification
Implementation checked on 2026-09-16. Unit tests and local browser checks covered 62/80 required marks, upward rounding from 59.25 to 60/75 (70.4% overall), zero and full remaining weight and impossible targets. Exact increment boundaries and narrow layouts were checked.
Supported inputs and limits
- completed-work average, remaining weight and target percentages from 0 to 100
- optional positive assessment maximum and mark increment
- An assessment is modeled as one remaining component.
- Maximum marks and increments must be positive, finite and within supported arithmetic bounds.
- Separate assessment pass marks, moderation and extra credit are not modeled.
- Allowed scores are multiples of the chosen increment from zero; choose the increment that matches your assessment.
Frequently asked questions
What if the remaining assessment has no weight?
At 0% remaining weight the completed average is final: the target is either already secured or impossible. No division by zero is attempted.
Does this enforce my exam pass rules?
No. It calculates a weighted overall target from your inputs. Separate pass marks, extra credit, moderation and institutional requirements must be checked independently.
Is information sent to a server?
Tool inputs are processed in this browser. This product does not use analytics or send your input to an external API. Clicking an external website link still visits that website.