#cattle-per-acre-calculator {
max-width: 700px;
margin: 20px auto;
padding: 20px;
background: #ffffff;
border-radius: 8px;
box-shadow: 0 2px 8px rgba(0,0,0,0.15);
font-family: -apple-system, BlinkMacSystemFont, ‘Arial’, sans-serif;
color: #333333;
box-sizing: border-box;
line-height: 1.6;
}
h2 {
text-align: center;
margin: 0 0 15px;
font-size: 1.6rem;
font-weight: 600;
color: #222222;
}
p {
text-align: center;
color: #666666;
font-size: 0.9rem;
margin-bottom: 20px;
}
.form-group {
margin-bottom: 20px;
}
label {
display: block;
margin-bottom: 6px;
font-size: 0.9rem;
font-weight: 600;
color: #333333;
}
input[type=”number”], select {
width: 100%;
padding: 10px;
border: 1px solid #dddddd;
border-radius: 4px;
font-size: 0.9rem;
box-sizing: border-box;
transition: border-color 0.3s, box-shadow 0.3s;
}
input[type=”number”]:focus, select:focus {
border-color: #0073aa;
box-shadow: 0 0 5px rgba(0,115,170,0.3);
outline: none;
}
.input-row {
display: flex;
gap: 15px;
flex-wrap: wrap;
}
.input-row .form-group {
flex: 1;
min-width: 120px;
}
.tooltip {
position: relative;
display: inline-block;
margin-left: 5px;
cursor: help;
}
.tooltip .tooltip-text {
visibility: hidden;
width: 220px;
background: #333333;
color: #ffffff;
text-align: center;
border-radius: 4px;
padding: 8px;
position: absolute;
z-index: 10;
bottom: 125%;
left: 50%;
transform: translateX(-50%);
opacity: 0;
transition: opacity 0.3s;
font-size: 0.75rem;
}
.tooltip:hover .tooltip-text {
visibility: visible;
opacity: 1;
}
.button-group {
display: flex;
gap: 12px;
justify-content: center;
margin: 20px 0;
}
button {
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 0.9rem;
font-weight: 500;
transition: background 0.3s, transform 0.2s;
}
button:hover {
transform: translateY(-1px);
}
#calculate-btn {
background: #0073aa;
color: #ffffff;
}
#calculate-btn:hover {
background: #005177;
}
#reset-btn {
background: #6c757d;
color: #ffffff;
}
#reset-btn:hover {
background: #5a6268;
}
#copy-btn {
background: #28a745;
color: #ffffff;
}
#copy-btn:hover {
background: #218838;
}
#result {
margin-top: 20px;
padding: 15px;
border-radius: 4px;
font-size: 0.9rem;
line-height: 1.6;
min-height: 30px;
opacity: 0;
transition: opacity 0.5s;
}
#result.show {
opacity: 1;
}
#result.success {
background: #e6f4ea;
border: 1px solid #28a745;
}
#result.error {
background: #f8d7da;
border: 1px solid #dc3545;
}
.notes {
margin-top: 15px;
font-size: 0.85rem;
}
.notes ul {
padding-left: 20px;
}
.learn-more {
display: block;
text-align: center;
margin-top: 15px;
font-size: 0.9rem;
color: #0073aa;
text-decoration: none;
}
.learn-more:hover {
text-decoration: underline;
}
noscript {
display: block;
color: #dc3545;
text-align: center;
margin-top: 15px;
font-size: 0.9rem;
}
@media (max-width: 600px) {
#cattle-per-acre-calculator {
margin: 10px;
padding: 15px;
}
h2 {
font-size: 1.3rem;
}
.input-row {
flex-direction: column;
}
.button-group {
flex-direction: column;
}
button {
width: 100%;
}
}
Total Cattle: ${totalCattle}
Recommendation: ${recommendation}
Cattle per Acre Calculator
Estimate the number of cattle that can graze on your pasture based on its condition, precipitation zone, and cattle size. One Animal Unit (AU) is a 1000 lb cow with a calf.
Excellent
Good
Fair
Poor
High (>16 inches)
Medium (12-16 inches)
Low (<12 inches)
Enter pasture details and click “Calculate”.
Learn More About Cattle Grazing
JavaScript is disabled. Please enable it to use the calculator.
(function() {
document.addEventListener(‘DOMContentLoaded’, function() {
const form = document.getElementById(‘calc-form’);
const areaInput = document.getElementById(‘area’);
const conditionSelect = document.getElementById(‘condition’);
const precipitationSelect = document.getElementById(‘precipitation’);
const cattleWeightInput = document.getElementById(‘cattle-weight’);
const resultDiv = document.getElementById(‘result’);
if (!form || !areaInput || !conditionSelect || !precipitationSelect || !cattleWeightInput || !resultDiv) {
console.error(‘Required DOM elements missing.’);
resultDiv.innerHTML = ‘Error: Calculator failed to initialize. Please refresh the page.’;
resultDiv.className = ‘error’;
return;
}
// Forage yield data (AUM/ac) based on Alberta Forage Manual and NRCS
const forageYields = {
excellent: { high: 7.5, medium: 6.0, low: 4.5 },
good: { high: 6.0, medium: 4.5, low: 3.0 },
fair: { high: 4.5, medium: 3.0, low: 2.0 },
poor: { high: 3.0, medium: 2.0, low: 1.0 }
};
// Utilization rates (25-75% depending on condition)
const utilizationRates = {
excellent: 0.75,
good: 0.60,
fair: 0.50,
poor: 0.25
};
function calculate() {
resultDiv.className = ”;
resultDiv.innerHTML = ”;
resultDiv.classList.remove(‘show’);
try {
const area = parseFloat(areaInput.value) || 0;
const condition = conditionSelect.value;
const precipitation = precipitationSelect.value;
const cattleWeight = parseFloat(cattleWeightInput.value) || 1000;
const aumPerAnimal = 1; // 1 AUM = monthly forage for 1000 lb cow with calf
if (area <= 0) {
throw new Error('Please enter a valid pasture area (greater than 0).');
}
if (cattleWeight 1) {
recommendation = ‘Consider rotational grazing to optimize pasture use.’;
} else if (cattlePerAcre < 0.4) {
recommendation = 'Pasture may be overgrazed; consider reducing cattle or improving conditions.';
} else {
recommendation = 'Pasture conditions support sustainable grazing.';
}
let message = `
Cattle per Acre: ${cattlePerAcre.toFixed(2)}Total Cattle: ${totalCattle}
Recommendation: ${recommendation}
Additional Tips:
`;
resultDiv.innerHTML = message;
resultDiv.className = ‘success’;
setTimeout(() => resultDiv.classList.add(‘show’), 100);
document.getElementById(‘copy-btn’).addEventListener(‘click’, () => {
const text = `
Cattle per Acre Calculator Results
Cattle per Acre: ${cattlePerAcre.toFixed(2)}
Total Cattle: ${totalCattle}
Recommendation: ${recommendation}
Additional Tips:
– 1 Animal Unit (AU) = 1000 lb cow with a calf up to 6 months.
– Rotational grazing can increase capacity by up to 30%.
– Monitor forage regrowth and adjust stocking rates seasonally.
`.trim();
navigator.clipboard.writeText(text).then(() => {
alert(‘Results copied to clipboard!’);
}).catch(() => {
alert(‘Failed to copy results. Please copy manually.’);
});
});
} catch (error) {
resultDiv.innerHTML = `Error: ${error.message}`;
resultDiv.className = ‘error’;
setTimeout(() => resultDiv.classList.add(‘show’), 100);
}
}
function reset() {
form.reset();
resultDiv.className = ”;
resultDiv.innerHTML = ‘Enter pasture details and click “Calculate”.’;
resultDiv.classList.remove(‘show’);
areaInput.focus();
}
document.getElementById(‘calculate-btn’).addEventListener(‘click’, calculate);
document.getElementById(‘reset-btn’).addEventListener(‘click’, reset);
form.addEventListener(‘keypress’, (e) => {
if (e.key === ‘Enter’ && e.target.tagName !== ‘BUTTON’) {
e.preventDefault();
calculate();
}
});
});
})();
- 1 Animal Unit (AU) = 1000 lb cow with a calf up to 6 months.
- Rotational grazing can increase capacity by up to 30%.
- Monitor forage regrowth and adjust stocking rates seasonally.