INR / PT
INR / PT: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.
INR / PT
Patient PTs
Mean normal PT (MNPT)s
Thromboplastin ISI
INR
2.1435
PT ratio
2
Interpretation
Typical therapeutic range 2–3
More about: INR / PT
What it calculates
The “INR / PT” calculator computes INR from 3 parameters: patient pt (s), mean normal pt (mnpt) (s), thromboplastin isi.
Used by professionals and patients to assess health metrics, dosages, and risks.
Example calculation
With parameters Patient PT = 24 s, Mean normal PT (MNPT) = 12 s, Thromboplastin ISI = 1.1 the result is 2.14 (The target range is set by the physician).
How to use
- Enter patient pt, mean normal pt (mnpt) and thromboplastin isi — each field above is adjustable with a slider.
- INR is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.
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