#turtle-tank-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) {
#turtle-tank-calculator {
margin: 10px;
padding: 15px;
}
h2 {
font-size: 1.3rem;
}
.input-row {
flex-direction: column;
}
.button-group {
flex-direction: column;
}
button {
width: 100%;
}
}
Minimum Land Area: ${minLandArea} square inches (1.5x shell length)
Suitability: ${suitabilityMessage}
Turtle Tank Size Calculator
Determine the ideal tank size for your turtle, including support for maximum species like the leatherback turtle. Use 10 gallons per inch of shell length as a guide.
Inches
Centimeters
Custom
Musk Turtle (5 inches)
Red-Eared Slider (12 inches)
Sulcata Tortoise (30 inches)
Leatherback (108 inches)
Enter turtle details and click “Calculate”.
Learn More About Turtle Tanks
JavaScript is disabled. Please enable it to use the calculator.
(function() {
document.addEventListener(‘DOMContentLoaded’, function() {
const form = document.getElementById(‘calc-form’);
const unitSelect = document.getElementById(‘unit’);
const shellLengthInput = document.getElementById(‘shell-length’);
const speciesSelect = document.getElementById(‘species’);
const resultDiv = document.getElementById(‘result’);
if (!form || !unitSelect || !shellLengthInput || !speciesSelect || !resultDiv) {
console.error(‘Required DOM elements missing.’);
resultDiv.innerHTML = ‘Error: Calculator failed to initialize. Please refresh the page.’;
resultDiv.className = ‘error’;
return;
}
function calculate() {
resultDiv.className = ”;
resultDiv.innerHTML = ”;
resultDiv.classList.remove(‘show’);
try {
const unit = unitSelect.value;
let shellLength = parseFloat(shellLengthInput.value) || 0;
const species = speciesSelect.value;
// Adjust shell length based on species if not custom
if (species !== ‘custom’) {
const speciesLengths = {
‘musk’: 5,
‘slider’: 12,
‘sulcata’: 30,
‘leatherback’: 108
};
shellLength = speciesLengths[species];
}
if (shellLength <= 0) {
throw new Error('Please enter a valid shell length (positive number).');
}
// Convert to inches if in cm
if (unit === 'cm') {
shellLength = shellLength / 2.54;
}
// Calculate tank size (10 gallons per inch)
const tankSizeGallons = Math.ceil(shellLength * 10);
const minLandArea = Math.ceil(shellLength * 1.5); // Minimum land area 1.5x shell length in inches
let suitabilityMessage = '';
if (shellLength <= 5) {
suitabilityMessage = `Suitable for small species like musk turtles. A ${tankSizeGallons}-gallon tank is recommended.`;
} else if (shellLength <= 12) {
suitabilityMessage = `Suitable for medium species like red-eared sliders. A ${tankSizeGallons}-gallon tank is recommended.`;
} else if (shellLength <= 30) {
suitabilityMessage = `Suitable for large species like Sulcata tortoises. A ${tankSizeGallons}-gallon tank is recommended.`;
} else {
suitabilityMessage = `Designed for maximum species like leatherback turtles (up to 108 inches). A ${tankSizeGallons}-gallon tank is the minimum, but custom habitats may be required.`;
}
let message = `
Tank Size: ${tankSizeGallons} gallonsMinimum Land Area: ${minLandArea} square inches (1.5x shell length)
Suitability: ${suitabilityMessage}
Additional Recommendations:
`;
resultDiv.innerHTML = message;
resultDiv.className = ‘success’;
setTimeout(() => resultDiv.classList.add(‘show’), 100);
document.getElementById(‘copy-btn’).addEventListener(‘click’, () => {
const text = `
Turtle Tank Size Calculator Results
Tank Size: ${tankSizeGallons} gallons
Minimum Land Area: ${minLandArea} square inches (1.5x shell length)
Suitability: ${suitabilityMessage}
Additional Recommendations:
– Ensure a filter rated for 2-3x tank size for waste management.
– Provide a basking area with UVB lighting for 12 hours daily.
– For large species, consider custom tanks due to size constraints.
`.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 turtle details and click “Calculate”.’;
resultDiv.classList.remove(‘show’);
shellLengthInput.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();
}
});
});
})();
- Ensure a filter rated for 2-3x tank size for waste management.
- Provide a basking area with UVB lighting for 12 hours daily.
- For large species, consider custom tanks due to size constraints.