Safe Leave Calculator
Your honest bunk budget: how many classes you can miss at any rule, a per-leave drop chart & weekly ration plan.
Your leave budget at 75%
9 classes
😎 You're at 82.00% — you can miss 9 more and stay at or above 75%.
Now
82.00%
After all leaves
75.23%
📉 How each leave pulls you down
Attendance after each consecutive leave — the red zone starts below 75%.
🎯 Leave budget at every common rule
at 65%
26
leaves
at 70%
17
leaves
at 75%
9
leaves
at 80%
2
leaves
at 85%
0
short now
at 90%
0
short now
⚠️ Your budget shrinks as more classes are held — recheck weekly, keep a buffer of 1–2 leaves for genuine emergencies, and remember attendance is usually counted per subject.
🏖️Your leave budget, computed honestly
Fests, family functions, sick days, or one glorious sleep-in — everyone needs leaves. The only question is how many you can afford. This calculator turns your attendance record into a precise leave budget: the exact number of classes you can miss and still satisfy your institution's rule, how each successive leave drags your percentage down, a per-week ration if you tell it how long the term runs, and the same budget across every common attendance rule at once.
📊Everything you'd want to know
- The exact safe-leave count for your target — 65% to 90% presets or any custom rule.
- A drop chart showing your percentage after each consecutive leave, with the last safe one marked.
- Where you'd stand after spending the whole budget — always still at or above the line.
- A weekly ration: tell it the weeks left and it spreads your budget ('about 1 leave per week').
- The budget at every common rule side-by-side — useful when different subjects have different requirements.
- A downloadable PDF leave-budget card.
🧮The maths
Skipping a class adds to classes-held but not to classes-attended, so your percentage falls with every leave. The floor function is deliberate — a budget of 7.8 means the 8th leave breaks the rule, so you get 7. When your current percentage is already below target, the budget is simply zero: recover first (our classes-to-attend calculator gives the exact streak), then budget again.
💡Spending your budget wisely
- Never spend to zero — hold back 1–2 leaves for genuine illness or emergencies you can't schedule.
- Recheck after every week: the budget changes as more classes are held.
- Budget per subject, not overall — most institutions count attendance subject-wise.
- Skipping right before internal exams costs more than attendance: you miss revision, hints, and sometimes surprise tests.
💡 Frequently Asked Questions
How many classes can I safely miss with 75% attendance required?+
The formula is ⌊attended × 100 ÷ 75 − held⌋. At 82 attended of 100 held, that's 9 classes. This calculator computes it live for any record and any required percentage, and shows the effect of each individual leave.
What is a safe leave calculator?+
It's a bunk calculator with honesty: it tells you the maximum classes you can miss while staying at or above your institution's minimum attendance, how each leave moves your percentage, and how to ration leaves across the weeks left in term.
If I use all my safe leaves, what happens to my percentage?+
You land just above the required line — the calculator shows the exact figure. That leaves zero margin for surprise absences, which is why the tool recommends keeping 1–2 leaves unspent as an emergency buffer.
Why is my safe leave count zero?+
Your attendance is already at or below the required percentage — there's nothing to spend. Use our classes-to-attend calculator to get your recovery streak first; once you're above the line again, a budget opens up.
Do leaves and holidays count against attendance?+
Official holidays and cancelled classes don't count as held, so they don't consume your budget. Approved duty leave (sports, NCC, placements) is usually credited as attended, and medical leave typically supports condonation instead — get both recorded in writing.