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Coagulation

INR

The prothrombin time rescaled so that a result means the same thing whichever laboratory produced it.

What it is

The prothrombin time rescaled so that a result means the same thing whichever laboratory produced it.

Why it matters

It is the number anticoagulation is actually dosed on, and the only clotting value worth charting across labs.

Reading the number

About 1.0 is untreated. A therapeutic target is set by the reason for treatment, so the range printed on the report is a general-population one and probably not yours if you take warfarin.

What moves it
warfarin and similar anticoagulantsvitamin K intakeliver functionantibioticsalcohol
Read alongside
Prothrombin timeaPTTAlbumin
When to raise it

Worth discussing a value that moves outside your own usual band.

Tracking only, not a diagnosis. The range above is a typical adult reference range — the range printed by the lab that ran your test is the one that applies to you. Discuss anything that concerns you with your doctor.

Also known as

On a report in another language.

A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under INR.

International Normalized RatioRazão Normalizada Internacional

Track your inr over time.

INR is one of 165 analytes Vitals Vault charts over time. Import a lab report in any language and this number lands on a timeline only you can read.

Continue with Google
Tracking only. This app is not medical advice. Always discuss results and future analysis with your doctor.

Catalog entry last updated 2026-08-28. Browse all 165 metrics.