The first read costs nothing
Upload your report and read it explained. You only decide about the full report once the free first read is in front of you.
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Your results, read against your own laboratory’s ranges
How to Read Your Blood Test Results
A full panel often runs to dozens of lines. Most of them are fine. Upload your report and the free first read tells you, by name, which ones are not.
Validated by our scientific and ethics committee of 12 physicians
TSH
Worth watching · H4.90mIU/L
Reference range: 0.40 – 4.00 mIU/L
- Just above your laboratory’s upper bound, by 0.90.
- The most likely causes, ranked, in your own context.
- What to ask at the appointment, and when to re-test.
Watch marker: most physicians act above 7.0
Upload your report: free first read in a few minutes
The free first read sorts every marker by what needs attention, against the reference ranges printed on your own report.
Drop your report here: PDF or image
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- Your name is removed: the engine reads your values and your context, not your identity.
- Your analysis is never used to train an AI, and never resold.
- You can delete a report, or your whole account, at any time. Where the data is hosted and read is set out in our privacy policy. Privacy policy.
The free first read, in three points
Every line, not only the flagged ones
The whole report is gone through, line by line, and every marker is sorted — including the values your laboratory left unflagged.
Four levels of interpretation: medical follow-up, worth watching, normal, excellent
Your laboratory’s own ranges
The same figure does not mean the same thing from one laboratory to the next. The free first read uses the intervals printed on your report, not a generic table.
Your ranges, your age, your sex
The method
How to read blood test results
A line on your report
| Test | Value | Unit | Reference range | Flag |
|---|---|---|---|---|
| Haemoglobin | 11.4 | g/dL | 12.0 – 15.5 | L |
| Platelets | 262 | ×10⁹/L | 150 – 400 | — |
| TSH | 4.90 | mIU/L | 0.40 – 4.00 | H |
The same test can be written two different ways: MCV on one report, mean cell volume on the next. Same measurement.
What every line on your report carries
Layouts differ from one laboratory to the next, and so does the number of columns. But every line answers the same questions: which test, what value, in which unit, against which range, and whether the value is flagged. Read them in that order and the wall of numbers resolves.
01 — Test
The name of the test says what was measured, and nothing else. Abbreviations vary between laboratories, so the same measurement can appear as MCV on one report and as mean cell volume on the next. Translating your blood test results starts here: settle what was measured before you worry about the figure beside it.
02 — Value
Your value is one measurement, on one sample, on one morning. It is not an average of your health, and it moves with hydration, the time of day, and what you did the evening before.
03 — Unit
The value means nothing without its unit. The same figure in g/dL and in g/L is out by a factor of ten, which is why a number copied from one report into another laboratory’s table can look alarming and be normal.
04 — Reference range
The reference range is the interval this laboratory considers usual, for its own method and, on some tests, for your age and sex. It is not a national standard, and it is the only range that applies to your value.
05 — Flag
The way a result is flagged changes from one laboratory to the next: an H or an L, an asterisk, a figure in bold or in red, an arrow up or down, and sometimes nothing at all. Whatever its form, it is the same automatic comparison: your value against the two numbers beside it. What it never says is how far outside you are: a value just above the ceiling and a value at three times the ceiling receive exactly the same mark.
Why an asterisk or a bold number does not mean “ill”
A laboratory range is not a border between ill and healthy. It is calculated to cover 95% of people in good health, which leaves the other 5% outside it while being perfectly well. Put plainly: out of twenty people in good health, one will have a flagged value on any given test, simply because that is how the range was drawn.
2 in 3
A twenty-test panel run on someone in good health has roughly a two-in-three chance of returning at least one flagged value.
Bold type, an asterisk, a highlighted cell: these mark a distance from the group, not a verdict on you. What matters is which value, by how much, in which direction, alongside which others, and in what clinical context.
A single flag on an otherwise unremarkable panel is the most common result there is.
Why two laboratories do not have the same normal ranges
Reference ranges are not national standards. Each laboratory establishes its own, because they depend on the analyser, the reagent lot, the calibration, the measurement method and the population that laboratory serves. Two laboratories twenty minutes apart can print different ceilings for ferritin or TSH and both be right.
The practical consequence: never compare your value with a range you found elsewhere. Compare it with the range printed on the same page as the value. And if you change laboratory mid-follow-up, expect a step in your curve that belongs to the method rather than to your health.
It is also why the free first read takes the ranges off your own report instead of applying its own.
What a single marker never tells you
One line is a data point. A report is read as a set, against your history, your treatments, and the reason the tests were ordered in the first place.
A raised ALT after a stomach bug, after an evening of drinking, or after starting a new medicine is not the same finding three times over. A low haemoglobin with small red cells and low ferritin reads one way; the same haemoglobin with large red cells reads another. A value drifting inside its own range over three years can carry more information than one flagged result.
So the useful question is not “is this line normal?” but “what does this panel say, and what does it leave open?” — which is where a panel-by-panel reading begins.
What the free first read gives you, and what the full report adds
Free first read
$0
How many markers need follow-up, are worth watching, are normal
Which ones deserve attention, by name
Your own laboratory’s ranges, not a generic table
Your name removed before any analysis
No payment, no card
Full report
$14.90
Every marker explained: its value, your laboratory’s range, what it measures
A summary by system: iron, lipids, kidney, liver, thyroid, immunity
A prioritised action plan and advice tailored to your context
Five questions to ask your doctor
One-off payment. Refunded on request, no questions asked.
The free first read tells you what deserves attention. The full report is your blood test results explained one by one: why a value sits outside its range, what weighs on it in your own context, and what to ask your doctor. A lab results interpreter is a way of understanding the sheet, never a diagnosis, and the price is shown before you decide.
Need to go further?
Four questions come up again and again. Each one opens the part of the site that answers it in full.
Common questions
What is a good tool for interpreting blood test results?
One that places each of your values on its own reference range, states the H or L flag in words, and says plainly what it cannot conclude. A tool that returns a diagnosis is overstepping — that reading belongs to the physician who ordered the tests.
How can I tell whether a blood panel is good?
By reading it as a set rather than a list. Most values inside their range, flagged lines only slightly outside, and nothing that contradicts the reason the tests were ordered: that is an unremarkable panel.
Does an out-of-range result mean I am ill?
No. A reference range is calculated to cover 95% of people in good health, so one person in twenty falls outside it on any given test while being perfectly well. What matters is how far outside you are, in which direction, and alongside which other values.
How long do blood test results take?
Routine panels come back within 24 to 48 hours, and most laboratories publish the report to an online portal. Cultures and specialised assays take longer, which is why some lines arrive separately.
What is the difference between a blood panel and a blood draw?
The draw is the act of taking the sample. The panel is the list of tests run on it. One draw can serve several panels.
Which diseases can a blood test detect?
Blood work describes how a few systems are behaving — blood cells, liver, kidneys, thyroid, lipids, glucose. It confirms or rules out some conditions and points towards others, but very few diagnoses rest on a blood test alone.
Can I enter my blood test results online for free?
You upload the report rather than typing the values in: a PDF or a photo of it, several files if your results came in more than one. The first read costs nothing. Typing a handful of numbers would lose what makes the reading work — the units, the reference ranges your own laboratory printed beside each value, and the lines you would not have thought to copy.
Is the first read really free?
Yes, and it needs no card. It tells you how many markers need medical follow-up, are worth watching or are normal, and names the ones that deserve attention — against your own laboratory’s ranges. The full report, which explains every marker and adds a summary by system and an action plan, is a one-off $14.90, refunded on request.