This calculator helps you estimate your sweat rate, which is crucial for athletes, especially in endurance sports or hot environments, to understand their hydration needs and prevent dehydration or overhydration.
function calculateSweatRate() {
var weight_initial = parseFloat(document.getElementById("weight_initial").value);
var weight_final = document.getElementById("weight_final").value;
var fluid_consumed = document.getElementById("fluid_consumed").value;
var duration = document.getElementById("duration").value;
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
// Input validation
if (isNaN(weight_initial) || isNaN(weight_final) || isNaN(fluid_consumed) || isNaN(duration)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (weight_initial <= 0 || weight_final <= 0 || fluid_consumed < 0 || duration <= 0) {
resultDiv.innerHTML = "Please enter positive values for weights and duration, and non-negative for fluid consumed.";
return;
}
// Calculate weight loss in kg
var weight_loss_kg = weight_initial – parseFloat(weight_final);
// Convert weight loss to liters (1 kg ≈ 1 liter of water)
var weight_loss_liters = weight_loss_kg;
// Calculate total fluid loss in liters
var total_fluid_loss_liters = weight_loss_liters + parseFloat(fluid_consumed);
// Calculate sweat rate in liters per hour
var sweat_rate_lph = total_fluid_loss_liters / parseFloat(duration);
resultDiv.innerHTML = "Estimated Sweat Rate: " + sweat_rate_lph.toFixed(2) + " liters per hour";
}
.sweat-rate-calculator {
font-family: sans-serif;
max-width: 500px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
background-color: #f9f9f9;
}
.sweat-rate-calculator h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.sweat-rate-calculator p {
color: #555;
line-height: 1.6;
}
.input-section {
margin-bottom: 15px;
display: flex;
flex-direction: column;
}
.input-section label {
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.input-section input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
}
.sweat-rate-calculator button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 5px;
font-size: 18px;
cursor: pointer;
transition: background-color 0.3s ease;
}
.sweat-rate-calculator button:hover {
background-color: #0056b3;
}
#result {
margin-top: 20px;
padding: 15px;
border: 1px solid #d4edda;
background-color: #d4edda;
color: #155724;
border-radius: 5px;
text-align: center;
font-size: 1.1em;
}