INR Calculator

A system, commonly called the INR, International Normalized Ratio, for reporting the results of blood coagulation (clotting) tests. PT/INR should be checked to ensure that the patient maintains the proper level of anticoagulation. The prothrombin time (PT or protime) is the actual time calculation, measured in seconds, for an anticoagulated sample of plasma or whole blood to clot after it is added to a thromboplastin reagent. This calculator is used to measure the INR.The international normalized ratio (INR) is a standardized number thats figured out in the lab. If you take blood thinners, also called anti-clotting drugs or anticoagulants, its especially important to check your INR. The INR is figured out using the results of the prothrombin time (PT) test, which measures the time it takes for your blood to clot. The INR is an international standard for the PT.The INR is a ratio, so its just a number, not a number tied to time or another value. Your results will vary according to your age, the medicines you take, and any health problems you have. In general, the higher the number, the longer it takes for your blood to clot.