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Credit Utilization Calculator

See how much of your credit card limits you're using, card by card and overall, and how much to pay down to reach your goal.

Level: Grade 6

  • Common Core standard 6.RP.A.3.cFind a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent.
Printable worksheet

Credit Utilization Calculator

Know the answer you need? Pick an input to work backward.

Inputs

The balance on your latest statement, which is usually what the card issuer reports.

Used to work out how much to pay down. 30% is a common rule of thumb; lower is generally better.

Result

Overall credit utilization

20.63%

You are using 20.63% of your $8,000.00 total credit limit.

Total balance
$1,650.00
Total credit limit
$8,000.00
Available credit
$6,350.00
Pay down to reach 30%
$0.00
Highest single card (card 1)
24%
Where this sits
Under the common 30% guidelineFor your information only. It doesn't predict a score.

See the step-by-step solution ↓

Utilization by card
Utilization by card
CardBalanceLimitUtilization
Card 1$1,200.00$5,000.0024%
Card 2$450.00$3,000.0015%

Step-by-step solution

  1. Add up the balances on every card

    $1,200.00+$450.00=$1,650.00

  2. Add up the credit limits on every card

    $5,000.00+$3,000.00=$8,000.00

  3. Divide what you owe by your total limit to see what share of your credit you're using

    $1,650.00$8,000.00×100=20.63%

  4. Find the most you could owe and stay at 30% of your total limit

    30100×$8,000.00=$2,400.00

  5. Good news: you already owe no more than that, so nothing needs paying down

    $0.00=$0.00

  6. Card 1 uses the biggest share of its own limit, which reports can show too

    $1,200.00$5,000.00×100=24%

Test yourself

20 quick questions built from this calculator's formula: work out results, predict what happens when an input changes, and work backward from an answer. Every answer comes with the working.

Please note: Results are estimates for planning and comparison. Lenders, banks, and tax authorities may round differently or include fees not modeled here, so confirm figures with your provider before deciding.

What this calculator does

Find out how much of your credit card limits you're using, and how much to pay down to reach a goal. That share is called credit utilization. It's your card balances divided by their credit limits. This is "revolving" credit, the kind you can borrow, repay and borrow again. Credit reports list the balance and limit for every card. Credit scoring models look at the ratio card by card and across all your cards together. Here's the encouraging part: it's one of the few parts of your credit file you can change in a month or two, just by paying balances down.

Enter the balances and limits for up to five cards. The calculator gives your overall ratio and each card's own ratio. It also shows how much you'd need to pay off to bring the overall figure down to a target. That could be the common 30% rule of thumb or a stricter 10%. It tells you where your ratio sits for information only. It doesn't predict a credit score, because scoring formulas are kept private and weigh many other things.

Where it's used

Why this math matters outside the classroom:

  • Checking a card. A cardholder with $450 owed on a $3,000 limit finds 450 ÷ 3,000 = 15% of the limit in use.
  • Planning a paydown. To bring $2,500 owed on a $5,000 limit to 30%, a borrower pays it down to $1,500, which takes $1,000.
  • Before a loan application. Someone planning to apply for a mortgage checks the total of balances over limits across all cards a few months ahead.
  • Classroom percents. Students find what percent $1,650 is of $8,000, which is 20.625%, the same calculation a credit report uses.
  • Closing an old card. A household sees that closing a $3,000-limit card would push $1,650 owed from 20.6% to 33% of their remaining limits.

Grade level and standards: Grade 6; Common Core State Standards for Mathematics 6.RP.A.3.c. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

How to use it

  1. For each card, enter the balance and the credit limit. Leave rows for cards you don't have blank.
  2. Set the target you want to reach. It starts at 30%, a common place to begin.
  3. Read your overall ratio, the table for each card and the amount to pay down to reach your target.

What the inputs mean

Card 1 balance
Card companies usually report the balance on your statement date, not the balance after your payment is due. Paying part of a bill before the statement closes lowers the number they report.
Card 1 credit limit
Use the credit limit shown on your statement or in the card's app. A card with no balance still adds its limit to your total.
Target utilization
The calculator finds the total balance that equals this percent of your combined limits. Then it subtracts that from what you owe now. If you're already under the target, the paydown is $0.

Formula and method

card utilization = card balance ÷ card limit × 100
overall utilization = (sum of balances) ÷ (sum of limits) × 100
balance at target = target % ÷ 100 × sum of limits
paydown to target = max(0, sum of balances − balance at target)

Utilization is a plain percent: how much of the credit open to you is in use. "Sum" means all of them added together. "max(0, …)" means the paydown never drops below zero. The overall figure gives bigger-limit cards more weight. So a large balance on a small card moves the total less than it moves that card's own ratio.

The paydown figure answers the question "how much would I need to pay off to get under X%?" It assumes your limits stay the same and the payment comes off the total. So you can spread it across your cards however you like. Paying the card with the highest ratio first also lowers your highest single-card figure.

Worked example

Two cards: $1,200 owed on a $5,000 limit and $450 owed on a $3,000 limit, with a 30% target.

  1. Total balance: $1,200 + $450 = $1,650.
  2. Total limit: $5,000 + $3,000 = $8,000.
  3. Overall utilization: $1,650 ÷ $8,000 × 100 = 20.63%.
  4. Balance at 30%: 0.30 × $8,000 = $2,400. That's more than $1,650, so nothing needs paying down.
  5. Card 1 alone: $1,200 ÷ $5,000 = 24%. Card 2: $450 ÷ $3,000 = 15%.

Result: Overall utilization is about 20.63%, which is under the 30% guideline. The highest single card is at 24%.

Understanding the result

Lenders generally look more kindly on lower utilization. The often-quoted 30% is a rule of thumb, not a cut-off in any scoring formula. People aiming for the strongest credit often keep it well below that.

Look at the table for each card as well as the total. One card near its limit can stand out on a report, even when your overall ratio is modest.

Utilization is based on the most recently reported balances, so it has no long memory. Once a lower balance is reported, your ratio drops with it.

Assumptions and limitations

  • The balances and limits are the ones your card companies report to the credit bureaus.
  • Only revolving credit is included. Installment loans (paid in fixed amounts), such as car loans and mortgages, aren't part of this ratio.
  • A blank balance next to a credit limit counts as $0 owed.
  • It doesn't estimate a credit score or how one might change. Scoring models are kept private and differ between versions. They also weigh payment history, account age, new credit and other things.
  • Card companies report at different times of the month. So the ratio on your report may not match a calculation you make today.
  • Some cards, such as charge cards with no preset spending limit, may be treated differently by different models.

Frequently asked questions

What is a good credit utilization ratio?

Lower is generally better. Keeping it under 30% is a widely repeated rule of thumb, and many people aim for under 10%. Using a little credit and paying it off generally looks better than letting balances build up. But no single number guarantees a particular score.

Does closing a credit card raise my utilization?

It can. Closing a card removes its limit from your total, so the same balances are divided by a smaller number. For example, $1,650 owed on $8,000 of limits is 20.63%. If the $3,000-limit card is closed, the same debt is 33% of $5,000.

Is utilization calculated per card or overall?

Both. Credit reports list each card's balance and limit, and scoring models can look at single cards as well as your total. That's why this calculator shows the figure for each card and points out the highest one.

Does paying in full every month mean 0% utilization?

Not always, which surprises many people. Card companies usually report your statement balance, meaning what you owed when the statement was made. That's true even if you pay it in full by the due date. Paying before the statement date lowers the balance they report.

How this calculator is checked

Method: Definition of revolving credit utilization: balances divided by credit limits, per account and in total, expressed as a percentage. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.

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