Inr
Inr is a fast, free health calculator. Enter Patient PT, Mean Normal PT and ISI of Reagent to get an instant, accurate result — complete with the formula, a step-by-step worked example, and answers to common questions, all on one page and private to your browser.
Formula
INR = (PT_patient / PT_meanNormal)^ISI
- INR = (PT_patient / PT_meanNormal)^ISI — for clinical reference only.
Inr
Inr calculation.
Frequently asked questions
Is this validated?
Yes, based on published clinical scoring systems. Always confirm with current guidelines.