Jury Selection Time Estimator

ANA›Life Services Authority›National Calculator Authority›Jury Selection Time Estimator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Jury Selection Time Estimator

Estimates the total duration of jury selection (voir dire) based on the number of jurors needed, panel size, peremptory and for-cause challenges, and average questioning time per juror.

Jurors Needed (seated jury + alternates)

Initial Jury Panel Size (venire)

Peremptory Challenges — Prosecution / Plaintiff

Peremptory Challenges — Defense

Estimated For-Cause Dismissal Rate (%)

Average Questioning Time per Juror (minutes)

Court Hours per Day (hours)

Administrative Overhead per Juror (minutes)

Estimate Selection Time Fill in the fields above and click Calculate.

function jurCalc() { var resultDiv = document.getElementById('jur-result');

var jurorsNeeded = parseFloat(document.getElementById('jur-jurors-needed').value); var panelSize = parseFloat(document.getElementById('jur-panel-size').value); var peremptPros = parseFloat(document.getElementById('jur-peremptory-prosecution').value); var peremptDef = parseFloat(document.getElementById('jur-peremptory-defense').value); var forCauseRate = parseFloat(document.getElementById('jur-forcause-rate').value); var questionTime = parseFloat(document.getElementById('jur-question-time').value); var courtHours = parseFloat(document.getElementById('jur-court-hours').value); var adminOverhead = parseFloat(document.getElementById('jur-admin-overhead').value);

// --- Validation --- if (isNaN(jurorsNeeded) || jurorsNeeded Please enter a valid number of jurors needed (at least 1).'; return; } if (isNaN(panelSize) || panelSize Please enter a valid panel size (at least 1).'; return; } if (isNaN(peremptPros) || peremptPros Prosecution peremptory challenges cannot be negative.'; return; } if (isNaN(peremptDef) || peremptDef Defense peremptory challenges cannot be negative.'; return; } if (isNaN(forCauseRate) || forCauseRate = 100) { resultDiv.innerHTML = 'For-cause dismissal rate must be between 0 and 99%.'; return; } if (isNaN(questionTime) || questionTime Questioning time must be at least 1 minute.'; return; } if (isNaN(courtHours) || courtHours Court hours per day must be greater than 0.'; return; } if (isNaN(adminOverhead) || adminOverhead Administrative overhead cannot be negative.'; return; }

// --- Core Formula --- // Total peremptory challenges var totalPeremptory = peremptPros + peremptDef;

// Minimum jurors that must be questioned to seat the jury: // We need enough jurors after for-cause AND peremptory dismissals. // jurors_questioned >= jurorsNeeded + forCauseDismissals + totalPeremptory // forCauseDismissals = forCauseRate/100 * jurors_questioned // Solving: Q * (1 - forCauseRate/100) - totalPeremptory = jurorsNeeded // Q = (jurorsNeeded + totalPeremptory) / (1 - forCauseRate/100) var survivorRate = 1 - (forCauseRate / 100); var jurorsQuestioned = Math.ceil((jurorsNeeded + totalPeremptory) / survivorRate);

// Cap at panel size var effectiveQuestioned = Math.min(jurorsQuestioned, panelSize);

// Check feasibility var forCauseDismissals = Math.round(effectiveQuestioned * (forCauseRate / 100)); var remainingAfterCause = effectiveQuestioned - forCauseDismissals; var seatedAfterPeremptory = remainingAfterCause - totalPeremptory;

var feasible = seatedAfterPeremptory >= jurorsNeeded;

// Total time per juror = questioning + admin overhead var timePerJuror = questionTime + adminOverhead;

// Total voir dire time (minutes) var totalMinutes = effectiveQuestioned * timePerJuror;

// Convert court hours to minutes var courtMinutesPerDay = courtHours * 60;

// Estimated days var estimatedDays = totalMinutes / courtMinutesPerDay;

// Hours and minutes breakdown var totalHours = Math.floor(totalMinutes / 60); var remainingMins = Math.round(totalMinutes % 60);

// --- Output --- var feasibilityNote = ''; if (!feasible) { feasibilityNote = '⚠ Warning: The panel size may be insufficient. After for-cause dismissals (' + forCauseDismissals + ') and peremptory challenges (' + totalPeremptory + '), only approximately ' + Math.max(0, seatedAfterPeremptory) + ' juror(s) would remain — fewer than the ' + jurorsNeeded + ' needed. Consider increasing the panel size.

'; }

resultDiv.innerHTML = feasibilityNote + '' + 'Jurors to be Questioned' + effectiveQuestioned + '' + 'Estimated For-Cause Dismissals' + forCauseDismissals + '' + 'Total Peremptory Challenges' + totalPeremptory + '' + 'Projected Seated Jurors' + Math.max(0, seatedAfterPeremptory) + '' + 'Time per Juror (Q&A + Admin)' + timePerJuror + ' min' + 'Total Voir Dire Time' + '' + totalHours + ' hr ' + remainingMins + ' min' + 'Estimated Court Days' + '' + estimatedDays.toFixed(2) + ' day(s)' + ''; }

#### Formula

Step 1 — Jurors to Question (Q): Q = ⌈(Jurors Needed + Total Peremptory Challenges) ÷ (1 − For-Cause Rate)⌉ Step 2 — For-Cause Dismissals: For-Cause Dismissals = Q × For-Cause Rate Step 3 — Projected Seated Jurors: Seated = Q − For-Cause Dismissals − Total Peremptory Challenges Step 4 — Total Voir Dire Time (minutes): Total Time = Q × (Questioning Time + Administrative Overhead) Step 5 — Estimated Court Days: Days = Total Time ÷ (Court Hours per Day × 60)

#### Assumptions & References

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References

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