This calculator helps you determine the amount of fertilizer needed for your lawn based on its size and the recommended application rate of your chosen fertilizer. Proper fertilization is crucial for a healthy, green, and resilient lawn. It provides essential nutrients like nitrogen (N), phosphorus (P), and potassium (K) that grass needs to thrive.
function calculateFertilizer() {
var lawnArea = document.getElementById("lawnArea").value;
var appRate = document.getElementById("appRate").value;
var resultDiv = document.getElementById("result");
// Clear previous results
resultDiv.innerHTML = "";
// Input validation
if (isNaN(lawnArea) || lawnArea <= 0) {
resultDiv.innerHTML = "Please enter a valid positive number for Lawn Area.";
return;
}
if (isNaN(appRate) || appRate < 0) {
resultDiv.innerHTML = "Please enter a valid non-negative number for Application Rate.";
return;
}
// Calculation logic
var fertilizerNeeded = (parseFloat(lawnArea) / 1000) * parseFloat(appRate);
// Display result
resultDiv.innerHTML = "You will need " + fertilizerNeeded.toFixed(2) + " lbs of fertilizer for your lawn.";
}
.calculator-container {
font-family: Arial, sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
background-color: #f9f9f9;
}
.calculator-container h2 {
text-align: center;
margin-bottom: 15px;
color: #333;
}
.calculator-container p {
line-height: 1.6;
color: #555;
margin-bottom: 20px;
}
.input-section {
margin-bottom: 15px;
}
.input-section label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.input-section input[type="number"] {
width: calc(100% – 12px);
padding: 8px;
margin-bottom: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
}
button {
display: block;
width: 100%;
padding: 10px 15px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.3s ease;
}
button:hover {
background-color: #45a049;
}
.result-section {
margin-top: 20px;
padding: 15px;
border: 1px solid #d4edda;
background-color: #d4edda;
color: #155724;
border-radius: 4px;
text-align: center;
}
.result-section strong {
font-weight: bold;
}