Roster Strength Calculator
ANA›Life Services Authority›National Calculator Authority›Roster Roster Strength 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; } }
Roster Strength Calculator
Calculate the overall strength of a roster based on player ratings, positional depth, and roster balance.
Number of Starters
Average Starter Rating (0–100)
Number of Bench / Reserve Players
Average Bench Rating (0–100)
Positions Filled
Total Required Positions
Number of Injured / Unavailable Players
Average Years of Experience
Calculate Roster Strength Fill in the fields above and click Calculate.
function rosCalc() { var starters = parseFloat(document.getElementById('ros_starters').value); var starterAvg = parseFloat(document.getElementById('ros_starter_avg').value); var bench = parseFloat(document.getElementById('ros_bench').value); var benchAvg = parseFloat(document.getElementById('ros_bench_avg').value); var posFilled = parseFloat(document.getElementById('ros_positions_filled').value); var posTotal = parseFloat(document.getElementById('ros_positions_total').value); var injuries = parseFloat(document.getElementById('ros_injuries').value); var experience = parseFloat(document.getElementById('ros_experience').value);
// --- Validation --- if (isNaN(starters) || starters Number of starters must be at least 1.'; return; } if (isNaN(starterAvg) || starterAvg 100) { document.getElementById('ros_result').innerHTML = 'Starter rating must be between 0 and 100.'; return; } if (isNaN(bench) || bench Bench count cannot be negative.'; return; } if (isNaN(benchAvg) || benchAvg 100) { document.getElementById('ros_result').innerHTML = 'Bench rating must be between 0 and 100.'; return; } if (isNaN(posFilled) || posFilled Positions filled must be at least 1.'; return; } if (isNaN(posTotal) || posTotal Total required positions must be at least 1.'; return; } if (posFilled > posTotal) { document.getElementById('ros_result').innerHTML = 'Positions filled cannot exceed total required positions.'; return; } if (isNaN(injuries) || injuries Injuries cannot be negative.'; return; } var totalPlayers = starters + bench; if (injuries > totalPlayers) { document.getElementById('ros_result').innerHTML = 'Injured players cannot exceed total roster size.'; return; } if (isNaN(experience) || experience Experience cannot be negative.'; return; }
// --- Formula --- // 1. Weighted Roster Rating (WRR) // WRR = (starters * starterAvg + bench * benchAvg) / (starters + bench) var totalRoster = starters + bench; var wrr = (starters * starterAvg + bench * benchAvg) / totalRoster;
// 2. Positional Balance Score (PBS) = posFilled / posTotal [0–1] var pbs = posFilled / posTotal;
// 3. Availability Factor (AF) = (totalRoster - injuries) / totalRoster [0–1] var af = (totalRoster - injuries) / totalRoster;
// 4. Experience Bonus (EB): capped at 10 years → max bonus 0.10 (10%) // EB = min(experience / 10, 1) * 0.10 var eb = Math.min(experience / 10, 1) * 0.10;
// 5. Depth Ratio (DR): bench-to-starter ratio, capped at 1.5 for bonus // DR_bonus = min(bench / starters, 1.5) / 1.5 * 0.05 (up to 5% bonus) var dr = (starters > 0) ? Math.min(bench / starters, 1.5) / 1.5 * 0.05 : 0;
// 6. Roster Strength Score (RSS) — out of 100 // RSS = WRR * PBS * AF * (1 + EB + DR) var rss = wrr * pbs * af * (1 + eb + dr); rss = Math.min(rss, 100); // cap at 100
// --- Rating Label --- var label = ""; if (rss >= 85) label = "Elite"; else if (rss >= 70) label = "Strong"; else if (rss >= 55) label = "Average"; else if (rss >= 40) label = "Below Average"; else label = "Weak";
var html = "Roster Strength Score: " + rss.toFixed(2) + " / 100 — " + label + ""; html += ""; html += "ComponentValue"; html += "Total Roster Size" + totalRoster + " players"; html += "Weighted Roster Rating (WRR)" + wrr.toFixed(2) + ""; html += "Positional Balance Score (PBS)" + (pbs * 100).toFixed(1) + "%"; html += "Availability Factor (AF)" + (af * 100).toFixed(1) + "%"; html += "Experience Bonus (EB)+" + (eb * 100).toFixed(2) + "%"; html += "Depth Ratio Bonus (DR)+" + (dr * 100).toFixed(2) + "%"; html += "Roster Strength Score (RSS)" + rss.toFixed(2) + " / 100"; html += "";
document.getElementById('ros_result').innerHTML = html; }
#### Formula
1. Weighted Roster Rating (WRR) WRR = (Starters × Starter Avg Rating + Bench × Bench Avg Rating) / Total Players
2. Positional Balance Score (PBS) PBS = Positions Filled / Total Required Positions [0 – 1]
3. Availability Factor (AF) AF = (Total Players − Injured Players) / Total Players [0 – 1]
4. Experience Bonus (EB) EB = min(Avg Experience / 10, 1) × 0.10 (up to +10%)
5. Depth Ratio Bonus (DR) DR = min(Bench / Starters, 1.5) / 1.5 × 0.05 (up to +5%)
6. Roster Strength Score (RSS) — out of 100 RSS = WRR × PBS × AF × (1 + EB + DR)
Rating bands: ≥85 Elite | ≥70 Strong | ≥55 Average | ≥40 Below Average | <40 Weak
#### Assumptions & References
- References: Massey & Thaler (2013) on talent valuation; Winston (2012) Mathletics; general sports analytics literature on roster construction.
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