Credit Utilization Calculator
Utilization ratio + projected credit score impact.
Utilization: 16.7%
Good
Sweet spot is 1-10%. Reporting date matters — pay before statement closes to lower reported utilization. Per-card matters too: don't max one even if total is low.
Credit utilization is the share of your available credit you are currently using. It is one of the biggest levers on your score because 'amounts owed' makes up about 30% of a FICO score, and utilization is the main part of that category.
The ratio is calculated both per card and across all your cards combined, and lenders look at both. A single maxed-out card can drag your score down even if your overall utilization looks fine.
Enter each card's balance and limit to see your per-card and overall utilization, and how far you are from the commonly cited 30% and 10% thresholds.
How this calculator works
Utilization = balance / credit limit, expressed as a percent. A $900 balance on a $3,000 limit is 30%. Overall utilization sums all balances and divides by all limits: $1,500 in balances across $10,000 of total limits is 15%. Both matter, so the tool reports each card and the aggregate. General guidance is to keep both overall and per-card utilization under 30%, and under about 10% for the best scores. Crucially, utilization has no memory: it is recalculated from whatever balance is reported to the bureaus each cycle, so it does not build up or average over time. Paying a card down before its statement closing date lowers the balance that gets reported, which can drop your utilization the very next update, no matter how high it was mid-cycle.
What affects the number
- Per-card ratio: one card near its limit can hurt even when your total utilization is low, so no single card should be maxed.
- Overall ratio: total balances divided by total limits across all revolving accounts; the aggregate number lenders weigh most.
- The 30% and 10% marks: staying under 30% avoids the biggest penalties, and under about 10% is associated with top scores.
- Statement date vs due date: the balance reported is usually the statement closing balance, so paying before that date lowers reported utilization.
- Credit limit changes: a higher limit or a new card raises available credit and lowers utilization; closing a card removes its limit and can raise it.
- No memory: utilization is a snapshot of the latest reported balance, so a high month does not linger once the balance is paid down.
Frequently asked questions
What is a good credit utilization ratio?
Keeping both your overall and per-card utilization under 30% avoids the largest scoring penalties, and under about 10% is associated with the highest scores. Zero across every card is not required and can occasionally look slightly worse than a small reported balance, so a low positive figure is fine.
Does paying my card before the statement date lower utilization?
Yes. Bureaus typically see the balance as of your statement closing date, so paying most of it down before that date means a lower balance gets reported. Because utilization has no memory, this can reduce your reported ratio on the next update even if you used the card heavily during the month.
How much does utilization affect my credit score?
Utilization is the main driver of the 'amounts owed' category, which is about 30% of a FICO score. That makes it one of the fastest levers you can move: unlike payment history, a lower reported balance can improve your score within a cycle or two.
Should I count all my cards or just the one with a balance?
Both. Scoring models look at each card's individual utilization and your overall ratio across all revolving accounts. A high balance on one card can hurt even if your combined utilization is low, so spreading balances or paying down the highest card can help.
This calculator provides general estimates for educational purposes only and is not financial advice. Your actual costs and credit outcomes depend on your specific card terms, issuer, and situation.