Calculate attendance percent and remaining absences

The rate is sessions attended divided by sessions scheduled. The more useful figure is the cushion: how many sessions the cutoff requires, minus how many you have already attended. That cushion is rounded down, because a half-absence does not exist and rounding up would push you through the limit.

rate = attended ÷ total sessions × 100

cushion = floor(attended − threshold ÷ 100 × total)

The calculation treats every meeting as equal, which is not always true: a required lab or a review session before the midterm may count double, or be fail-the-course on its own. Excused absences follow each school’s handbook and are not split out here. Use the figure to know where you stand, not to argue an official count.

Sessions attended

Class meetings you actually attended.

Sessions in total

Meetings scheduled for the whole term. Attended cannot exceed total.

Required threshold

The minimum percent required. Many US colleges publish 75% or 80%; some labs are stricter.

Assumptions

• Every meeting carries the same weight.
• The total covers the whole term, future meetings included.
• The remaining-absence figure is rounded down.

Limits

• No split between excused and unexcused absences.
• No double-weight labs and no single meeting that fails the course on its own.
• Does not replace the official count in the attendance system.

Keep the cushion, not the percent: “three absences left” is easier to act on than “90% attendance.” Watch what you put in as the total: if you enter only the meetings already held, the cushion looks worse than it is, because remaining class days still sit in the final denominator.

• Entering only the meetings already held.

  The total should cover the whole term so the remaining-absence count is honest.

• Rounding the cushion up.

  One extra absence would put you under the cutoff; the rounding is deliberately down.

• Assuming a doctor’s note does not count.

  That depends on the handbook; this tool does not split excused days out.

• Grade as a percentPoints earned divided by points possible, times 100. The letter follows common US cutoffs, printed on the page so you can compare them with your syllabus.
• Grade needed on the finalThree numbers are enough: current average, target grade and the final’s weight. The tool also says whether the target is still in reach.
• PercentageEnter two numbers of the same kind. The tool returns (part ÷ total) × 100 — useful for a test score, a slice of a budget, or a share of a count.
• Business daysA business day here is Monday through Friday. Saturday is not a business day. Metropolitan France statutory holidays are optional. The interval is inclusive: start and end count. This is not a US federal-holiday calendar.
• Course grade by categoryOne line per category, with its score and its syllabus weight. The result is normalised, and the page tells you if weight is still missing.

Written by Rédaction HexaCalc (editorial team). Content last updated: August 25, 2026. No third-party medical or financial review is claimed.

• Les Éléments, Livre I (théorème de Pythagore) et Livre VII (algorithme d’Euclide) — Tradition mathématique euclidienne