110 LB/(SY*INCH)
function convertToFeet(value, unit) {
if (unit === "feet") { return value; }
if (unit === "inches") { return value / 12; }
if (unit === "meters") { return value * 3.280839895; }
}
function convertToInches(value, unit) {
if (unit === "inches") { return value; }
if (unit === "feet") { return value * 12; }
if (unit === "meters") { return value * 39.37007874; }
}
function calculateAsphalt() {
// Get values const widthValue = parseFloat( document.getElementById("width").value );
const lengthValue = parseFloat( document.getElementById("length").value );
const thicknessValue = parseFloat( document.getElementById("thickness").value );
// Get selected units const widthUnit = document.getElementById("widthUnit").value;
const lengthUnit = document.getElementById("lengthUnit").value;
const thicknessUnit = document.getElementById("thicknessUnit").value;
const error = document.getElementById("error");
const result = document.getElementById("result");
// Validate if ( isNaN(widthValue) || isNaN(lengthValue) || isNaN(thicknessValue) || widthValue <= 0 || lengthValue <= 0 || thicknessValue <= 0 ) { error.style.display = "block"; result.value = ""; return; } error.style.display = "none"; /* STEP 1 Convert Width and Length to Feet */ const widthFeet = convertToFeet(widthValue, widthUnit); const lengthFeet = convertToFeet(lengthValue, lengthUnit); /* STEP 2 Convert Thickness to Inches */ const thicknessInches = convertToInches( thicknessValue, thicknessUnit ); /* STEP 3 Calculate Square Yards Square Yards = Width (ft) × Length (ft) ÷ 9 */ const squareYards = (widthFeet * lengthFeet) / 9; /* STEP 4 Calculate Asphalt Weight Pounds = Square Yards × Thickness × 110 lb/(SY × inch) */ const pounds = squareYards * thicknessInches * 110; /* STEP 5 Convert Pounds to Tons 1 US ton = 2,000 pounds */ const tons = pounds / 2000; /* Display result */ result.value = tons.toFixed(2) + " tons"; } function clearCalculator() { document.getElementById("width").value = ""; document.getElementById("length").value = ""; document.getElementById("thickness").value = ""; document.getElementById("result").value = ""; document.getElementById("error").style.display = "none"; }