What is an attendance buffer?

Your buffer is how many classes you can still miss while staying at or above your target (for example 75%) based on classes already held. It updates live as you change inputs.

How many classes do I need to reach 75%?

If you are below target, recovery is the number of consecutive classes you must attend to reach your goal. The calculator shows this as a recovery count and a simple timeline.

What does semester projection mean?

Semester projection uses your remaining class capacity to estimate how many classes you must attend and how many you can still skip before the term ends — not just today’s buffer.

Is this attendance calculator free?

Yes. The free attendance calculator needs no signup. For ERP sync, alerts, and full planning, open the SaveMy75 app.

Does this work for college 75% rules?

Yes. Set your target to 75% (or higher). Institutions may have condonation or special rules — treat results as planning estimates, not official policy.

Can I plan skips with this tool?

Yes. Use buffer for short-term skips and semester projection for longer planning. The simulator lets you try Attend, Skip, Holiday, or Cancelled and see the impact instantly.

Free · No signup · Shareable

Attendance Calculator

Calculate attendance percentage, safe buffer, recovery classes, and semester projection — live. Built for the 75% rule and any custom target.

Start calculating Try a scenario

Instant buffer & recovery
Semester projection
Same math as SaveMy75 app

Estimates for planning only — your institution’s attendance rules are final.

Your numbers

Everything updates live — no calculate button.

Classes attended

Classes held

Semester remaining

Semester capacity

442classes

Target attendance75%

50%100%

Live results

You have planning room

Borderline

82.32

current

Current attendance

82.32%

298 of 362 classes

Safe buffer

35 classes

You can miss these without going under target

Recovery required

Already at or above target

Semester outlook

Safe

You can miss about 46 remaining classes and still hit 75%.

Recommendation

You can safely skip tomorrow — buffer of 35 classes remains.

Buffer

Recover

Must attend

Can skip

Visual insights

Recovery timeline

You're already at or above 75%. Protect your buffer.

01Today82.32% now
02On target≥ 75%

Formula visualization

How your plan is built

Current attendance, target, gap, recovery, buffer, and semester projection — same math as the SaveMy75 app.

Current %82.3%

Required %75%

Gap to target0 pts

Recovery classes0 classes

Safe buffer35 classes

Semester can skip46 of 80 remaining

01
Current %
Attended ÷ held
02
Buffer / recovery
Held-based bunk or catch-up
03
Semester plan
Must attend vs can skip remaining

Semester projection

Simulate the next class

Apply an outcome and watch attendance, buffer, and semester plan update with the shared engine.

Borderline

Attendance

82.32%

Buffer

Must attend

Remaining

You can safely skip tomorrow — buffer of 35 classes remains.

Example scenarios

Try a real situation

One click loads realistic numbers so you can learn the calculator instantly.

Tip: after loading a scenario, use Attend / Skip in the semester simulator to stress-test your plan.

FAQ