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October 24, 2023

T3 – Reverse T3 Ratio Calculator

A Reverse T3 Ratio is a measure used in the field of endocrinology to assess thyroid function. It involves comparing the levels of Reverse T3 (RT3), an inactive form of the thyroid hormone, to the levels of Free T3 (FT3), the active form of the hormone. A high RT3 ratio may indicate a condition known as Reverse T3 Dominance, where the body is producing too much RT3 and not enough FT3, leading to symptoms of hypothyroidism despite normal thyroid-stimulating hormone (TSH) levels.

T3 – Reverse T3 Ratio Calculator

T3 Reverse T3 Ratio Calculator

Enter T3 Value (pg/mL):

Enter Reverse T3 Value (ng/dL):

Calculate Ratio

// Get DOM elements
const t3Input = document.getElementById('t3');
const reverseT3Input = document.getElementById('reverse-t3');
const calculateButton = document.getElementById('calculate-button');
const resultElement = document.getElementById('result');

// Add event listener to the button
calculateButton.addEventListener('click', calculateRatio);

// Function to calculate the T3 Reverse T3 ratio
function calculateRatio() {
// Get values from input fields
const t3Value = parseFloat(t3Input.value);
const reverseT3Value = parseFloat(reverseT3Input.value);

// Check if the input is valid
if (isNaN(t3Value) || isNaN(reverseT3Value)) {
resultElement.textContent = 'Please enter valid numeric values for T3 and Reverse T3.';
return;
}

// Convert T3 value to ng/dL
const t3ValueInNgDL = t3Value / 10; // 1 pg/mL = 0.1 ng/dL

// Calculate the ratio
const ratio = t3ValueInNgDL / reverseT3Value;

// Display the result
resultElement.textContent = `T3 Reverse T3 Ratio: ${ratio.toFixed(2)}`;