The International Normalized Ratio (INR) calculator is a simple, free tool to assess the unified prothrombin time (PT), and its meaning. It's an easy way to evaluate both the extrinsic …

This INR calculator determines the international normalized ratio to help with monitoring effectiveness of anticoagulation therapy.

Jul 24, 2025 · Calculate and interpret the International Normalized Ratio (INR) - the standardized measure of blood clotting time. Essential for warfarin monitoring, bleeding risk assessment, …

INR Calculator for quick INR checks, warfarin monitoring, and dosing guidance to improve patient safety.

This INR calculator helps you convert your prothrombin time (PT) test results into the standardized International Normalized Ratio (INR) quickly and accurately.

The INR is calculated using a formula that compares the prothrombin time (PT) of the patient’s blood with the PT of a healthy individual. The formula used is: - Patient’s PT is the prothrombin …

Dec 5, 2024 · Enter the patient’s prothrombin time, mean normal prothrombin time, and the international sensitivity index into the calculator to determine the International Normalized …

Jun 27, 2025 · The calculator inputs these values and applies the INR formula to deliver a result that accurately reflects the blood's clotting ability. This standardized output is critical when …

Dec 6, 2025 · The INR is not a direct measurement but a calculated value derived from the Prothrombin Time using a specific mathematical formula. The formula is: INR = (Patient PT / …

Oct 3, 2025 · Calculate the International Normalized Ratio, or INR, of a patient in seconds with our free-to-use calculator.