I already broke down why utilization matters so much for your credit score in a separate piece. This is the tool version, plug in your actual cards and see exactly where you stand instead of estimating.
Short version: enter each card’s balance and limit, and you’ll see your overall utilization graded against the same fixed thresholds scoring models actually use, under 10% is excellent, under 30% is the commonly recommended ceiling, above that starts working against you. The calculator also checks your cards individually, since one maxed-out card can drag your score down even if your overall number looks fine.
How to Use It
List every credit card you currently have a balance on, along with that card’s credit limit. Don’t worry about cards sitting at zero, they’re not part of the calculation either way.
If you’re planning to pay something down this month, enter that amount too. The calculator will show you your utilization both as it stands right now and after that payment, so you can see exactly how much moving money actually shifts the number, before you move it.
Why Your Overall Number Isn’t the Whole Story
Most people think of utilization as one number, total balances divided by total limits. That’s real, and it matters. But scoring models also look at your highest individual card’s utilization specifically, not just the blended average.
Here’s what that means in practice: someone with $1,200 owed on a $5,000-limit card and $2,800 owed on a $3,000-limit card has a combined utilization of exactly 50%. Looks moderate. But that second card individually is sitting at 93%, nearly maxed, and that’s the number that actually hurts more than the blended average suggests. Paying that specific card down, even before touching the other one, moves the needle more than spreading the same dollars evenly across both.
This is exactly why the calculator shows a per-card breakdown alongside the overall figure, and calls out by name whichever card is dragging your average down the most.
What the Grade Actually Means
Unlike some of the other calculators on this site, this one isn’t graded against a target you pick, it’s graded against fixed, widely-used thresholds that scoring models themselves are built around:
Under 10%: excellent, the range that helps your score the most. 10-29%: good, within the commonly recommended ceiling. 30-49%: starting to work against you. 50-74%: a real drag on your score. 75%+: the range that hurts the most, regardless of how reliably you’re paying on time.
Lower is always better here. That’s different from a savings or budgeting calculator where you’re working toward a number you chose, utilization has one right direction, down.
List each card’s current balance and its credit limit. This isn’t about how much you owe overall, it’s about how much of each card’s limit you’re actually using, which is what scoring models look at closest.
Leave this blank to just see where you stand right now.
Once You Know Your Numbers
If your overall utilization is coming in high, the fastest lever is usually the specific card the calculator flags, not spreading payments evenly. Beyond that, Credit Cards & Debt covers the broader picture of using credit without getting buried, and How to Improve Your Credit Score goes into what else actually moves the needle beyond utilization specifically.
If you’re actively shopping for a card right now, whether that’s your first one or a replacement for one that’s maxed out, Best Credit Cards for Building Credit and Secured vs. Unsecured Credit Cards both cover what’s actually worth applying for right now.
Frequently Asked Questions
Under 10% is considered excellent. Under 30% is the commonly recommended ceiling most experts point to. Anything above 30% starts working against your score, and it gets progressively worse the higher it climbs.
Both. Scoring models look at your total balances against total limits, but also flag individual cards that are maxed out or close to it, even if your overall blended number looks fine. A single high-utilization card can hurt your score more than the average suggests.
For utilization purposes specifically, target whichever card has the highest percentage used, not necessarily the highest dollar balance. A small-limit card that’s nearly maxed out can hurt more than a larger balance on a card with plenty of room left.
Usually not, and it can actually hurt. Closing a card removes its available limit from your total, which can raise your overall utilization percentage even if your balances haven’t changed. Keeping unused cards open, especially ones with no annual fee, generally helps this number.
Your numbers are saved only in your own browser, not sent to or stored on any server. Use “Clear my data” before closing the tab if you’re on a shared or public device.