Calcium score by age
What coronary calcium scores look like at each age, where the reference numbers come from, and what a percentile does — and does not — tell you.
People arrive at this question two ways. Either they have a number and want to know whether it is ordinary for someone their age, or they are deciding whether to book a scan and want to know what they might find. Both are answerable, but only with a published reference and its limits stated alongside it — which is what most pages on this subject leave out.
Nobody has medically reviewed this page. CalciumCT.com is a directory of published cash prices. We do not perform scans, read scans, employ clinicians, or practise medicine in any state. What any number means for you is a conversation with a clinician who knows your history.
If you want what the raw number itself measures rather than how it compares, start with what your calcium score means.
Where these numbers come fromEverything in the tables below is an output of the Coronary Age Calculator
published by MESA, the Multi-Ethnic Study of Atherosclerosis — an NHLBI cohort of 6,814 US adults who were free of clinical cardiovascular disease when they enrolled. We queried it directly, once for each combination of age, sex and race or ethnicity, on 20 September 2026. Nothing here is transcribed from a secondary source.
The underlying publication is McClelland RL, Chung H, Detrano R, Post W, Kronmal RA. Circulation 2006;113(1):30-37.
MESA states the tool is applicable only to the four race and ethnicity categories it offers and only within ages 45 to 84. It says so itself, and that limit matters more than anything else on this page — see below.
What MESA says its own tool cannot do
This is the single most important sentence on the subject, and it is MESA’s, not ours: the calculator reports where a score sits in a distribution, not what that score means for your risk.
It is a lookup built from the 2006 distribution paper. MESA separately publishes a MESA CHD Risk Score that does combine a calcium score with the other risk factors to estimate event risk — a different tool answering a different question. A percentile tells you how your score compares with people who share your age, sex and race or ethnicity. It is not itself a risk estimate, and it does not become one by being high.
That distinction is not pedantic. What your calcium score means sets out the MESA analysis that compared the two directly: both predicted coronary events, the absolute score predicted them somewhat better, and the authors recommended acting on the raw number rather than the percentile.
The reference valuesScores at each percentile, and the estimated probability of having any
coronary calcium at all.
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 36 | 25% |
| 55 | 0 | 6 | 68 | 234 | 56% |
| 65 | 5 | 71 | 307 | 802 | 77% |
| 75 | 52 | 248 | 820 | 2030 | 90% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 0 | 7% |
| 55 | 0 | 0 | 1 | 38 | 26% |
| 65 | 0 | 0 | 54 | 228 | 47% |
| 75 | 0 | 49 | 237 | 649 | 73% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 16 | 19% |
| 55 | 0 | 0 | 15 | 94 | 37% |
| 65 | 0 | 8 | 95 | 330 | 56% |
| 75 | 2 | 75 | 331 | 891 | 75% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 0 | 8% |
| 55 | 0 | 0 | 0 | 30 | 21% |
| 65 | 0 | 0 | 26 | 159 | 37% |
| 75 | 0 | 19 | 138 | 436 | 62% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 42 | 23% |
| 55 | 0 | 0 | 27 | 153 | 38% |
| 65 | 0 | 22 | 141 | 429 | 64% |
| 75 | 15 | 97 | 358 | 888 | 84% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 0 | 4% |
| 55 | 0 | 0 | 0 | 18 | 19% |
| 65 | 0 | 0 | 19 | 106 | 38% |
| 75 | 0 | 16 | 116 | 362 | 62% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 3 | 50 | 28% |
| 55 | 0 | 0 | 34 | 150 | 45% |
| 65 | 0 | 18 | 121 | 372 | 64% |
| 75 | 3 | 53 | 229 | 599 | 77% |
| Age | 25th | 50th | 75th | 90th | Chance of any calcium |
|---|---|---|---|---|---|
| 45 | 0 | 0 | 0 | 0 | 4% |
| 55 | 0 | 0 | 2 | 47 | 27% |
| 65 | 0 | 0 | 45 | 194 | 46% |
| 75 | 0 | 16 | 103 | 314 | 64% |
Two readings worth making explicitAt 45, a zero is the ordinary result. For a White man the tool estimates
roughly a 25% chance of any calcium; for a White woman, about 7%. So few women that age have any that the 90th percentile for a 45-year-old White woman is itself 0. A percentile at that age is telling you almost nothing except that most people like you scored zero.
At 75 the picture inverts. The tool estimates a 90% chance of any calcium for a White man and 73% for a White woman, and the median White man’s score is 248. Being in the middle of the distribution at 75 is not the same as being at low risk, because the middle of that distribution already has established plaque.
The same score means different things at different ages
A score of 50 is a different finding at 45 than at 75, and the tables show how differently. At 45 it sits above the 90th percentile for a White man. At 75 it sits near the 25th. Same plaque, same number, opposite ends of the distribution.
This is the strongest argument for not reading a percentile as a risk score. It moves with the comparison group, and the comparison group changes every year you age.
Race is an input, and it does not point where most people assume
The tool asks for race or ethnicity because the distributions differ, and the direction surprises people. At 55, the estimated chance of any coronary calcium is56% for a White man, 45% for a Chinese man, 38% for a Hispanic man and 37% for a Black man.
A given score therefore lands at a higher percentile when compared against a group that carries less calcium on average. The percentile is moving because the reference group moved, not because the plaque in your arteries is different.
Worth saying plainly: this is a statement about distributions in one cohort, not about you. Cardiovascular risk calculators have been moving away from using race as an input at all, on the grounds that it stands in for things like access to care rather than biology. The percentile tables have not followed. That is a reason to treat the percentile as the weaker of the two numbers on your report.
Where the reference itself is thin
Under 45, MESA has no answer. The tool refuses ages below 45, and that is the honest response rather than a gap to be filled by guessing. If you are 38 and have a score above zero, the useful fact is not a percentile — it is that any calcium at that age is unusual and worth a conversation.
Above 75, the numbers rest on fewer people. The percentiles come from MESA’s first exam, and at the top of the age range the counts behind each cell get small. Treat the 75 row as directional.
We do not publish a percentile calculator here, and that is deliberate. No single published reference spans the ages our readers actually are. A lookup on this site could not answer honestly for a large share of the people who would type into it, so we point at MESA’s own tool and name its limits instead.
What a percentile is not
- Not a risk score. It is a position in a distribution. MESA publishes a separate risk tool for risk.
- Not a treatment threshold. Guidelines act on the absolute score — the common cut points are 100 and 400 — not on percentiles.
- Not comparable between tools. A percentile from a different cohort, a different scanner protocol or a different decade is a different number.
- Not a reason to ignore a low absolute score at a high percentile. The MESA authors were explicit that people with low absolute scores are low-risk regardless of percentile rank.
Where to go next
- What your calcium score means — what the number measures, what the bands describe, and what the scan cannot see.
- What a scan costs — published self-pay prices, by state.
- Find a scan near you.
Sources
- Reference values — MESA Coronary Age Calculator, https://tools.mesa-nhlbi.org/Calcium/input.aspx, queried 20 September 2026. All 32 rows in the tables above are its direct outputs.
- Underlying distribution paper — McClelland RL, Chung H, Detrano R, Post W, Kronmal RA. Circulation 2006;113(1):30-37.
- Absolute score versus percentile — Budoff MJ, et al., JACC, 2009;53(4):345–352. PMID 19161884
This is general education, not medical advice, and no clinician has reviewed it. A percentile is one way of describing one number. What yours means is a conversation with a licensed clinician who knows your history.
Last updated September 20, 2026.