Credit Utilization Ratio Calculator
Enter your total credit card balances and total credit limits across all cards to calculate your credit utilization ratio — one of the most heavily weighted factors in most credit scoring models.
How the Credit Utilization Ratio formula works
A simple ratio:
Credit utilization = (Total balances / Total credit limits) × 100
Utilization is commonly calculated both per-card and across all cards combined — this calculator computes the overall ratio.
Step-by-step calculation
- Add up the current balance on every credit card.
- Add up the credit limit on every credit card.
- Divide total balances by total limits and multiply by 100.
Worked example
Total balances of $2,400 across cards with a combined credit limit of $12,000: Utilization = (2,400/12,000) × 100 = 20%.
Frequently asked questions
What's a good credit utilization ratio?
Under 30% is a commonly cited general guideline, with under 10% often associated with the strongest credit scores — though exact scoring impact varies by credit scoring model and individual credit history.
Does utilization matter per card or just overall?
Both — most scoring models look at overall utilization across all cards, but a single card sitting near its limit can also affect your score even if your overall utilization looks fine, so it's worth checking both.