Your blood test, explained
You're holding your lab results and wondering what one of those numbers means. Pick the value, type it in, and get a clear, sourced answer — including when it's worth talking to your doctor.
Free · sourced from medical references · no account, no data stored
Most-checked values
All values we cover
How it works
- Find the value on your report. Lab reports list each measurement with its unit — for example "Hemoglobin 13.5 g/dL".
- Enter it here. We show where it sits on the reference scale, what the band means, and common reasons for it.
- Talk to your doctor. Every page links its medical sources — bring the questions that matter to your appointment.
Why you can trust it
Every classification threshold on this site follows mainstream clinical guidance — MedlinePlus, Mayo Clinic, professional bodies like the ADA, AHA and NKF — and the sources are linked on every single page. We explain, we don't diagnose: your own lab's printed reference range and your doctor always have the final word. How we work