Calculate how much of your available credit you are using.
The sum of all balances currently owed on your credit cards.
The combined maximum limit of all your revolving credit accounts.
How to Calculate Credit Utilization Rate
Your credit utilization rate is a key factor in your credit score, representing the percentage of your total available credit that you're currently using. FICO and other scoring models use this to determine how responsibly you manage revolving debt.
The Formula
(Total Balances รท Total Credit Limits) x 100 = Credit Utilization Rate %
Example Calculation
Suppose you have two credit cards:
Card A: $500 balance, $2,000 limit
Card B: $1,000 balance, $3,000 limit
Your total balance is $1,500 ($500 + $1,000) and your total limit is $5,000 ($2,000 + $3,000). To find your rate: $1,500 / $5,000 = 0.30. Multiply by 100 to get 30%.
Why Does It Matter?
Credit utilization accounts for approximately 30% of your FICO Score. Financial experts generally recommend keeping your utilization below 30% to avoid negatively impacting your credit score. However, those with the highest credit scores often keep their utilization below 10%.
function calculateCreditUtilization() {
var balance = parseFloat(document.getElementById('totalBalance').value);
var limit = parseFloat(document.getElementById('totalLimit').value);
var resultArea = document.getElementById('resultArea');
var output = document.getElementById('utilizationOutput');
var status = document.getElementById('utilizationStatus');
var advice = document.getElementById('utilizationAdvice');
if (isNaN(balance) || isNaN(limit) || limit <= 0) {
alert("Please enter valid numbers. The Credit Limit must be greater than zero.");
return;
}
var utilization = (balance / limit) * 100;
var roundedUtilization = utilization.toFixed(2);
resultArea.style.display = 'block';
output.innerText = roundedUtilization + "%";
if (utilization <= 10) {
resultArea.style.backgroundColor = "#ecfdf5";
output.style.color = "#059669";
status.innerText = "Excellent Utilization";
status.style.color = "#059669";
advice.innerText = "You are in the top tier for credit scoring! Keeping your utilization under 10% is ideal for maintaining an elite credit score.";
} else if (utilization <= 30) {
resultArea.style.backgroundColor = "#f0fdf4";
output.style.color = "#16a34a";
status.innerText = "Good Utilization";
status.style.color = "#16a34a";
advice.innerText = "This is a healthy utilization rate. Staying below 30% is the standard recommendation for a good credit score.";
} else if (utilization <= 50) {
resultArea.style.backgroundColor = "#fffbeb";
output.style.color = "#d97706";
status.innerText = "Moderate Utilization";
status.style.color = "#d97706";
advice.innerText = "You're starting to use a large portion of your credit. Consider paying down your balances to get below 30% for a score boost.";
} else {
resultArea.style.backgroundColor = "#fef2f2";
output.style.color = "#dc2626";
status.innerText = "High Utilization";
status.style.color = "#dc2626";
advice.innerText = "High utilization can significantly lower your credit score. Lenders may see this as a sign of financial risk. Aim to pay down balances immediately.";
}
}