Child Screen Time Safety Calculator

ANA›Life Services Authority›National Calculator Authority›Child Screen Time Safety Calculator

.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; } }

Child Screen Time Safety Calculator

Calculate recommended daily screen time limits and a safety score for your child based on age, screen activity type, and current usage patterns. Based on guidelines from the American Academy of Pediatrics (AAP).

Child's Age (years)

Current Daily Screen Time (hours)

Primary Screen Activity

Educational / Learning Creative (drawing, music, coding) Video Calls / Social Passive Entertainment (TV, videos) Gaming

Average Break Every (minutes)

Child's Daily Sleep (hours)

Daily Physical Activity (hours)

Calculate

function chiCalc() { var age = parseFloat(document.getElementById('chi-age').value); var dailyHours = parseFloat(document.getElementById('chi-daily-hours').value); var activity = document.getElementById('chi-activity').value; var breakMins = parseFloat(document.getElementById('chi-breaks').value); var sleep = parseFloat(document.getElementById('chi-sleep').value); var physical = parseFloat(document.getElementById('chi-physical').value); var resultDiv = document.getElementById('chi-result');

// --- Input Validation --- if (isNaN(age) || age 17) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Please enter a valid age between 0 and 17 years.'; return; } if (isNaN(dailyHours) || dailyHours 24) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Please enter valid daily screen time between 0 and 24 hours.'; return; } if (isNaN(breakMins) || breakMins 240) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Please enter a break interval between 1 and 240 minutes.'; return; } if (isNaN(sleep) || sleep 24) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Please enter valid sleep hours between 0 and 24.'; return; } if (isNaN(physical) || physical 24) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Please enter valid physical activity hours between 0 and 24.'; return; } if (dailyHours + sleep + physical > 24) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Screen time + sleep + physical activity cannot exceed 24 hours.'; return; }

// --- Step 1: AAP Recommended Daily Limit (hours) --- // Under 18 months: 0 (video chat exception not counted) // 18–24 months: 1 (high-quality programming only) // 2–5 years: 1 // 6–12 years: 2 // 13–17 years: 3 (AAP recommends consistent limits; 3h is a common practical guideline) var ageMonths = age * 12; var recLimit; if (ageMonths 0 ? 1.0 : 0.0; } else { excessRatio = Math.max(0, (effectiveHours - recLimit) / recLimit); }

// --- Step 4: Break Score (0–25 points) --- // AAP / ophthalmology recommend 20-20-20 rule: break every 20 min // Score peaks at 20-min breaks, degrades linearly beyond 60 min // breakScore = 25 × max(0, 1 − |breakMins − 20| / 60) var breakScore = 25 * Math.max(0, 1 - Math.abs(breakMins - 20) / 60);

// --- Step 5: Sleep Score (0–25 points) --- // Recommended sleep by age (National Sleep Foundation): // 0–2: 11–14h, 3–5: 10–13h, 6–13: 9–11h, 14–17: 8–10h var recSleepMin, recSleepMax; if (age = recSleepMin && sleep = 80) { riskCategory = 'Low Risk — Excellent Habits'; riskColor = '#27ae60'; riskEmoji = '✅'; } else if (safetyScore >= 60) { riskCategory = 'Moderate Risk — Good, Room to Improve'; riskColor = '#f39c12'; riskEmoji = '⚠'; } else if (safetyScore >= 40) { riskCategory = 'Elevated Risk — Adjustments Recommended'; riskColor = '#e67e22'; riskEmoji = '🔴'; } else { riskCategory = 'High Risk — Immediate Changes Needed'; riskColor = '#c0392b'; riskEmoji = '🛑'; }

// --- Step 10: Weekly Totals --- var weeklyHours = dailyHours * 7; var weeklyRecLimit = recLimit * 7; var weeklyExcess = Math.max(0, weeklyHours - weeklyRecLimit);

// --- Step 11: Recommendations --- var recs = []; if (recLimit === 0) { recs.push('Children under 18 months should have no screen time except video chatting.'); } else if (dailyHours > recLimit) { recs.push('Reduce daily screen time by ' + (dailyHours - recLimit).toFixed(1) + ' hour(s) to meet the AAP recommended limit of ' + recLimit + 'h/day for age ' + age + '.'); } if (breakMins > 30) { recs.push('Shorten screen sessions — aim for a break every 20 minutes (20-20-20 rule: look 20 feet away for 20 seconds).'); } if (sleep = 80 ? '#27ae60' : safetyScore >= 60 ? '#f39c12' : safetyScore >= 40 ? '#e67e22' : '#c0392b';

resultDiv.style.display = 'block'; resultDiv.innerHTML = '### Results for Age ' + age + ' — ' + activityLabel + ' ' +

'' + '' + 'Overall Safety Score' + '' + safetyScore + ' / 100' + '' + '' + '' + '' + '' + riskEmoji + ' ' + riskCategory + '

' + '' +

'' + '' + 'Metric' + 'Value' + 'Score' + '' + '' + 'Screen Time Compliance' + '' + dailyHours + 'h / ' + recLimit + 'h rec.' + '' + complianceScore.toFixed(1) + ' / 25' + '' + '' + 'Break Frequency' + 'Every ' + breakMins + ' min' + '' + breakScore.toFixed(1) + ' / 25' + '' + '' + 'Sleep Duration' + '' + sleep + 'h / ' + recSleepMin + '–' + recSleepMax + 'h rec.' + '' + sleepScore.toFixed(1) + ' / 25' + '' + '' + 'Physical Activity' + '' + physical + 'h / ' + recPhysical + 'h rec.' + '' + physicalScore.toFixed(1) + ' / 25' + '' + '' +

'' +
'Weekly Summary' +
'Current weekly screen time: ' + weeklyHours.toFixed(1) + ' hours' +
'Recommended weekly limit: ' + weeklyRecLimit.toFixed(1) + ' hours' +
(weeklyExcess > 0
? 'Weekly excess: ' + weeklyExcess.toFixed(1) + ' hours over limit'
'Within weekly recommended limits ✓') + '' +

'' + '💡 Recommendations' + recHTML + '' + ''; }

#### Formula

Safety Score (0–100) = Screen Time Compliance Score + Break Score + Sleep Score + Physical Activity Score

AAP Recommended Daily Screen Time Limits: <18 months: 0h | 18–24 months: 1h | 2–5 years: 1h | 6–12 years: 2h | 13–17 years: 3h.

#### Assumptions & References

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