Study Session Pomodoro Timer Calculator

ANA›Life Services Authority›National Calculator Authority›Study Session Pomodoro Timer Calculator

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Study Session Pomodoro Timer Calculator

Plan your study sessions using the Pomodoro Technique. Enter your available study time and preferences to calculate how many Pomodoro cycles you can complete, along with total focus and break time.

Total Available Study Time (minutes)

Focus (Work) Duration per Pomodoro (minutes)

Short Break Duration (minutes)

Long Break Duration (minutes)

Pomodoros per Set (before long break)

Calculate

Results will appear here.

function stuCalc() { var resultDiv = document.getElementById('stu-result');

var totalTime = parseFloat(document.getElementById('stu-total-time').value); var focusDuration = parseFloat(document.getElementById('stu-focus-duration').value); var shortBreak = parseFloat(document.getElementById('stu-short-break').value); var longBreak = parseFloat(document.getElementById('stu-long-break').value); var pomodorosPerSet = parseFloat(document.getElementById('stu-pomodoros-per-set').value);

// --- Validation --- if (isNaN(totalTime) || totalTime Please enter a valid total available study time (> 0 minutes).'; return; } if (isNaN(focusDuration) || focusDuration Please enter a valid focus duration (> 0 minutes).'; return; } if (isNaN(shortBreak) || shortBreak Please enter a valid short break duration (> 0 minutes).'; return; } if (isNaN(longBreak) || longBreak Please enter a valid long break duration (> 0 minutes).'; return; } if (isNaN(pomodorosPerSet) || pomodorosPerSet Pomodoros per set must be at least 2.'; return; } if (longBreak Long break should be longer than short break.'; return; } if (totalTime Total time is less than one focus duration. Not enough time for even one Pomodoro.'; return; }

/ * FORMULA: * A "set" consists of N Pomodoros (pomodorosPerSet). * Within a set, each Pomodoro is followed by a short break, * EXCEPT the last Pomodoro in the set which is followed by a long break. * * Time for one full set: * T_set = N * focusDuration + (N - 1) * shortBreak + longBreak * * After the last set (or partial set), no trailing break is added. * * Algorithm: Greedily fit Pomodoros one by one, tracking remaining time. * After each Pomodoro: * - If it completes a set AND there is time for a long break AND more work after → add long break * - Else if there is time for a short break AND more work after → add short break * - Else → stop (no more Pomodoros fit) /

var remaining = totalTime; var completedPomodoros = 0; var totalFocusTime = 0; var totalShortBreaks = 0; var totalLongBreaks = 0; var completedSets = 0; var positionInSet = 0; // 0-indexed position within current set

while (remaining >= focusDuration) { // Do one Pomodoro remaining -= focusDuration; totalFocusTime += focusDuration; completedPomodoros++; positionInSet++;

var isEndOfSet = (positionInSet === pomodorosPerSet);

if (isEndOfSet) { completedSets++; positionInSet = 0; // Add long break only if there's time for it AND at least one more Pomodoro fits after if (remaining >= longBreak + focusDuration) { remaining -= longBreak; totalLongBreaks += longBreak; } else { break; // No more full Pomodoros possible after this set } } else { // Add short break only if there's time for it AND at least one more Pomodoro fits after if (remaining >= shortBreak + focusDuration) { remaining -= shortBreak; totalShortBreaks += shortBreak; } else { break; // No more full Pomodoros possible } } }

var totalBreakTime = totalShortBreaks + totalLongBreaks; var timeUsed = totalFocusTime + totalBreakTime; var unusedTime = totalTime - timeUsed; var numShortBreaks = (totalShortBreaks / shortBreak); var numLongBreaks = (totalLongBreaks / longBreak); var focusPct = totalTime > 0 ? ((totalFocusTime / totalTime) * 100).toFixed(1) : 0; var breakPct = totalTime > 0 ? ((totalBreakTime / totalTime) * 100).toFixed(1) : 0;

function fmtTime(mins) { var h = Math.floor(mins / 60); var m = Math.round(mins % 60); if (h > 0 && m > 0) return h + 'h ' + m + 'm'; if (h > 0) return h + 'h'; return m + 'm'; }

var html = '### 📅 Pomodoro Session Plan '; html += ''; html += 'Total Pomodoros Completed' + completedPomodoros + ' Pomodoros'; html += 'Complete Sets (' + pomodorosPerSet + ' Pomodoros each)' + completedSets + ' set' + (completedSets !== 1 ? 's' : '') + ''; html += 'Remaining Pomodoros (partial set)' + positionInSet + ' Pomodoro' + (positionInSet !== 1 ? 's' : '') + ''; html += 'Total Focus Time' + fmtTime(totalFocusTime) + ' (' + focusPct + '%)'; html += 'Total Break Time' + fmtTime(totalBreakTime) + ' (' + breakPct + '%)'; html += '  ↳ Short Breaks' + numShortBreaks + ' × ' + shortBreak + ' min = ' + fmtTime(totalShortBreaks) + ''; html += '  ↳ Long Breaks' + numLongBreaks + ' × ' + longBreak + ' min = ' + fmtTime(totalLongBreaks) + ''; html += 'Total Time Used' + fmtTime(timeUsed) + ''; html += 'Unused / Buffer Time' + fmtTime(unusedTime) + ''; html += '';

if (completedPomodoros === 0) { html = 'Not enough time to complete even one Pomodoro with the given settings.'; }

resultDiv.innerHTML = html; }

#### Formula

Time for one complete set (N Pomodoros): Tset = N × F + (N − 1) × S + L Where: • N = Pomodoros per set • F = Focus duration per Pomodoro (minutes) • S = Short break duration (minutes) • L = Long break duration (minutes) Greedy fitting algorithm: Pomodoros are added one at a time. After each Pomodoro, a short break is added (if it completes a set, a long break is added instead), but only if the remaining time can accommodate the break plus at least one more focus period. The last Pomodoro of the session carries no trailing break. Unused time: Tunused = Ttotal − (Tfocus + Tshort breaks + Tlong breaks)

#### Assumptions & References

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References

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