Credit Utilization Calculator

ANA›Life Services Authority›National Calculator Authority›Credit Utilization 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; } }

Credit Utilization Calculator

Calculate your overall and per-card credit utilization ratio — a key factor in your credit score.

### Overall Credit Utilization

Total Credit Card Balances ($)

Total Credit Limits ($)

### Per-Card Utilization (Optional)

Card 1

Balance ($)

Credit Limit ($)

Card 2

Balance ($)

Credit Limit ($)

Add Card
Remove Card

Target Utilization Rate (%)

Recommended: keep below 30% (ideal: below 10%)

Calculate

function creAddCard() { var container = document.getElementById('cre-cards-container'); var rows = container.querySelectorAll('.cre-card-row'); var newIndex = rows.length + 1; var div = document.createElement('div'); div.className = 'cre-card-row'; div.setAttribute('data-index', newIndex); div.innerHTML = 'Card ' + newIndex + '' + 'Balance ($)' + '' + 'Credit Limit ($)' + ''; container.appendChild(div); }

function creRemoveCard() { var container = document.getElementById('cre-cards-container'); var rows = container.querySelectorAll('.cre-card-row'); if (rows.length > 1) { container.removeChild(rows[rows.length - 1]); } }

function creRatingLabel(pct) { if (pct totalLimit) errors.push('Total balance cannot exceed total credit limit.'); }

if (isNaN(targetUtil) || targetUtil 100) errors.push('Target Utilization Rate must be between 1 and 100.');

// --- Per-card inputs --- var balanceInputs = document.querySelectorAll('.cre-card-balance'); var limitInputs = document.querySelectorAll('.cre-card-limit'); var cardData = []; var hasAnyCard = false;

for (var i = 0; i l) errors.push('Card ' + (i+1) + ': Balance cannot exceed credit limit.'); if (!isNaN(b) && !isNaN(l) && b >= 0 && l > 0 && b 0) { resultDiv.style.display = 'block'; resultDiv.innerHTML = 'Please fix the following:' + errors.map(function(e){ return ''; }).join('') + ''; return; }

var html = '';

// --- Overall Utilization --- if (hasOverall) { var overallUtil = (totalBalance / totalLimit) * 100; var rating = creRatingLabel(overallUtil); var maxSpend = (targetUtil / 100) * totalLimit; var reduceBy = Math.max(0, totalBalance - maxSpend); var availableCredit = totalLimit - totalBalance;

html += '### Overall Credit Utilization '; html += ''; html += 'Total Balance$' + totalBalance.toFixed(2) + ''; html += 'Total Credit Limit$' + totalLimit.toFixed(2) + ''; html += 'Available Credit$' + availableCredit.toFixed(2) + ''; html += 'Utilization Rate' + overallUtil.toFixed(2) + '%'; html += 'Rating' + rating.label + ''; html += '';

// Progress bar var barPct = Math.min(overallUtil, 100); html += ''; html += ''; html += '0%10%30%50%100%';

html += ''; html += 'To reach your ' + targetUtil.toFixed(1) + '% target:'; if (reduceBy > 0) { html += 'Reduce your balance by $' + reduceBy.toFixed(2) + ' (target max balance: $' + maxSpend.toFixed(2) + ').'; } else { html += 'You are already at or below your ' + targetUtil.toFixed(1) + '% target. Great job!'; } html += ''; }

// --- Per-Card Utilization --- if (cardData.length > 0) { html += '### Per-Card Utilization '; html += ''; html += '' + 'Card' + 'Balance' + 'Limit' + 'Utilization' + 'Rating' + '';

for (var j = 0; j ' + 'Card ' + card.index + '' + '$' + card.balance.toFixed(2) + '' + '$' + card.limit.toFixed(2) + '' + '' + cardUtil.toFixed(2) + '%' + '' + cardRating.label + '' + ''; }

// Aggregate from card data var sumBal = cardData.reduce(function(a,c){ return a + c.balance; }, 0); var sumLim = cardData.reduce(function(a,c){ return a + c.limit; }, 0); var aggUtil = (sumBal / sumLim) * 100; var aggRating = creRatingLabel(aggUtil); html += '' + 'Total (Cards)' + '$' + sumBal.toFixed(2) + '' + '$' + sumLim.toFixed(2) + '' + '' + aggUtil.toFixed(2) + '%' + '' + aggRating.label + '' + ''; html += '';

// Per-card target advice if (!isNaN(targetUtil)) { html += ''; html += 'Per-card advice to reach ' + targetUtil.toFixed(1) + '% target:'; for (var k = 0; k 0) { html += '- Card ' + cd.index + ': Reduce balance by $' + cardReduce.toFixed(2) + ' (target: $' + cardMax.toFixed(2) + ')'; } else { html += ''; } } html += ''; } }

resultDiv.style.display = 'block'; resultDiv.innerHTML = html; }

#### Formulas Used

Overall Credit Utilization Rate:

Utilization Rate (%) = (Total Balance ÷ Total Credit Limit) × 100

Per-Card Utilization Rate:

Card Utilization (%) = (Card Balance ÷ Card Limit) × 100

Maximum Balance for Target Utilization:

Max Balance = (Target Rate ÷ 100) × Credit Limit Amount to Reduce = Current Balance − Max Balance (if positive)

Utilization Rating Scale:

≤ 10% — Excellent
11% – 30% — Good
31% – 50% — Fair
51% – 75% — Poor
75% — Very Poor

#### Assumptions & References

Both overall (aggregate) and per-card utilization ratios are considered by credit bureaus (FICO, VantageScore).
FICO recommends keeping utilization below 30%; consumers with the highest scores typically stay below 10%.
Credit utilization accounts for approximately 30% of a FICO credit score — the second largest factor after payment history.
References: myFICO — Credit Utilization; CFPB — Credit Utilization Rate.

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References

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