Calculate Body Fat Percentage Navy
.navy-calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e1e1e1;
border-radius: 12px;
background-color: #ffffff;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.navy-calc-container h2 {
color: #1a2b49;
margin-top: 0;
text-align: center;
}
.navy-calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
@media (max-width: 600px) {
.navy-calc-grid { grid-template-columns: 1fr; }
}
.navy-calc-field {
display: flex;
flex-direction: column;
}
.navy-calc-field label {
font-weight: 600;
margin-bottom: 8px;
color: #333;
}
.navy-calc-field input, .navy-calc-field select {
padding: 12px;
border: 2px solid #ddd;
border-radius: 6px;
font-size: 16px;
transition: border-color 0.3s;
}
.navy-calc-field input:focus {
border-color: #0056b3;
outline: none;
}
.navy-calc-btn {
background-color: #1a2b49;
color: white;
border: none;
padding: 15px 30px;
font-size: 18px;
font-weight: bold;
border-radius: 6px;
cursor: pointer;
width: 100%;
transition: background-color 0.3s;
}
.navy-calc-btn:hover {
background-color: #2a3b59;
}
.navy-calc-result {
margin-top: 25px;
padding: 20px;
border-radius: 8px;
background-color: #f8f9fa;
text-align: center;
display: none;
}
.navy-calc-result h3 {
margin: 0;
color: #1a2b49;
font-size: 24px;
}
.navy-calc-category {
font-weight: bold;
font-size: 18px;
margin-top: 10px;
color: #007bff;
}
.navy-article {
margin-top: 40px;
line-height: 1.6;
color: #444;
}
.navy-article h2 {
color: #1a2b49;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.navy-table {
width: 100%;
border-collapse: collapse;
margin: 20px 0;
}
.navy-table th, .navy-table td {
border: 1px solid #ddd;
padding: 12px;
text-align: left;
}
.navy-table th {
background-color: #f2f2f2;
}
function toggleHips() {
var gender = document.getElementById("navyGender").value;
var hipsContainer = document.getElementById("hipsContainer");
var waistLabel = document.getElementById("waistLabel");
if (gender === "female") {
hipsContainer.style.display = "flex";
waistLabel.innerText = "Waist Circumference (cm)";
} else {
hipsContainer.style.display = "none";
waistLabel.innerText = "Abdomen (cm)";
}
}
function calculateNavyBF() {
var gender = document.getElementById("navyGender").value;
var height = parseFloat(document.getElementById("navyHeight").value);
var neck = parseFloat(document.getElementById("navyNeck").value);
var waist = parseFloat(document.getElementById("navyWaist").value);
var hips = parseFloat(document.getElementById("navyHips").value);
var resultDiv = document.getElementById("navyResult");
var resultContent = document.getElementById("resultContent");
if (!height || !neck || !waist || (gender === "female" && !hips)) {
alert("Please fill in all required measurements.");
return;
}
// Convert cm to inches for the standard Navy formula
var h_in = height / 2.54;
var n_in = neck / 2.54;
var w_in = waist / 2.54;
var hi_in = hips / 2.54;
var bodyFat = 0;
if (gender === "male") {
// Navy Formula for Men: 86.010*log10(abdomen – neck) – 70.041*log10(height) + 36.76
bodyFat = 86.010 * Math.log10(w_in – n_in) – 70.041 * Math.log10(h_in) + 36.76;
} else {
// Navy Formula for Women: 163.205*log10(waist + hip – neck) – 97.684*log10(height) – 78.387
bodyFat = 163.205 * Math.log10(w_in + hi_in – n_in) – 97.684 * Math.log10(h_in) – 78.387;
}
if (isNaN(bodyFat) || bodyFat < 0) {
resultContent.innerHTML = "