This calculator helps healthcare professionals determine the correct infusion rate for intravenous (IV) medications and fluids. Accurate calculation is crucial for patient safety and effective treatment. The primary formula used is:
Rate (mL/hr) = Total Volume (mL) / Time (hr)
Sometimes, the time is given in minutes, in which case it needs to be converted to hours. Another common scenario involves calculating the rate based on drops per minute when using gravity-fed IVs without a pump, but this calculator focuses on pump delivery rates.
function calculateIVRate() {
var volume = parseFloat(document.getElementById("volume").value);
var timeHours = parseFloat(document.getElementById("time").value);
var timeMinutes = parseFloat(document.getElementById("time_minutes").value);
var totalHours = 0;
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(volume) || volume 0) {
totalHours = timeHours;
} else if (!isNaN(timeMinutes) && timeMinutes > 0) {
totalHours = timeMinutes / 60;
} else {
resultDiv.innerHTML = "Please enter a valid infusion time in hours or minutes.";
return;
}
var rateMlPerHour = volume / totalHours;
if (isNaN(rateMlPerHour)) {
resultDiv.innerHTML = "Could not calculate rate. Please check your inputs.";
} else {
// Format to one decimal place for precision, but avoid .0 if it's a whole number
var formattedRate = rateMlPerHour.toFixed(1);
if (formattedRate.endsWith('.0')) {
formattedRate = rateMlPerHour.toFixed(0);
}
resultDiv.innerHTML = "