Enter days held and days present to get the percentage, and — the part usually done wrong by hand — how many consecutive days a student must now attend to clear a shortfall, given that attending also increases the denominator.
What counts as a held day, whether medical leave is excluded, and whether the threshold applies per subject or overall all vary by board and university.
The percentage is easy arithmetic. The question that follows it is not: a student at 68% with a 75% requirement wants to know how many more days they have to attend, and almost everybody computes that wrongly, because each additional day raises both the numerator and the denominator.
A student has attended 96 of 120 days — 80% — and needs 85%. The instinct is to compute the missing 5% of 120 and answer six days. That is wrong, because the six days they attend are also six more days held.
The correct figure comes from solving for the days that satisfy the requirement on both sides of the fraction: days needed is (target × days held − 100 × days present) ÷ (100 − target), rounded up. For this student it is twenty days, not six — a materially different conversation with a parent.
None of these is a calculation problem. All of them change the result, which is why a shortfall notice should quote the rule it was computed under.
Phrased the way they arrive, answered so each one stands on its own.
Enter your figures above and the calculator gives the number. It accounts for the fact that attending raises both days present and days held, which is why the answer is larger than the naive one.
No. It is common but not universal, and several institutions set different thresholds per programme or per subject. The calculator takes whatever threshold applies to you.
No. It runs in your browser, nothing is sent anywhere, and there is no sign-in.
Checked by the Implementations desk on 6 September 2026. Corrections go in the page, dated, rather than quietly.
Pricing is on the page, in the open, with the counting rule written next to it. Nobody has to book a call to find out what it costs.
See pricingForty minutes with an implementation engineer — your classes, your fee heads, your grading scheme, entered as we go. No slides, no sample school.