#dog-food-calculator {
max-width: 700px;
margin: 20px auto;
padding: 20px;
background: #ffffff;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
font-family: -apple-system, BlinkMacSystemFont, ‘Arial’, sans-serif;
color: #333333;
box-sizing: border-box;
line-height: 1.5;
}
h2 {
text-align: center;
margin: 0 0 15px;
font-size: 1.5rem;
font-weight: 600;
color: #222222;
}
p {
text-align: center;
color: #666666;
font-size: 0.9rem;
margin-bottom: 20px;
}
.form-group {
margin-bottom: 20px;
position: relative;
}
label {
display: block;
margin-bottom: 6px;
font-size: 0.9rem;
font-weight: 600;
color: #333333;
}
input[type=”number”], select, #breed-input {
width: 100%;
padding: 10px;
border: 1px solid #dddddd;
border-radius: 4px;
font-size: 0.9rem;
box-sizing: border-box;
transition: border-color 0.3s;
}
input:focus, select:focus, #breed-input:focus {
border-color: #0073aa;
outline: none;
}
.unit-toggle, .checkbox-group {
display: flex;
gap: 10px;
margin-top: 5px;
}
.unit-toggle label, .checkbox-group label {
font-weight: normal;
font-size: 0.85rem;
cursor: pointer;
}
.autocomplete-list {
position: absolute;
width: 100%;
max-height: 150px;
overflow-y: auto;
background: #ffffff;
border: 1px solid #dddddd;
border-radius: 4px;
z-index: 10;
margin-top: 2px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.autocomplete-item {
padding: 8px;
font-size: 0.9rem;
cursor: pointer;
}
.autocomplete-item:hover {
background: #f0f0f0;
}
.tooltip {
position: relative;
display: inline-block;
margin-left: 5px;
cursor: help;
}
.tooltip .tooltip-text {
visibility: hidden;
width: 200px;
background: #333333;
color: #ffffff;
text-align: center;
border-radius: 4px;
padding: 6px;
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;
}
#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;
}
#result.success {
background: #e6f4ea;
border: 1px solid #28a745;
}
#result.error {
background: #f8d7da;
border: 1px solid #dc3545;
}
.health-tips {
margin-top: 15px;
font-size: 0.85rem;
}
.health-tips ul {
padding-left: 20px;
}
noscript {
display: block;
color: #dc3545;
text-align: center;
margin-top: 15px;
font-size: 0.9rem;
}
@media (max-width: 600px) {
#dog-food-calculator {
margin: 10px;
padding: 15px;
}
h2 {
font-size: 1.3rem;
}
.button-group {
flex-direction: column;
}
button {
width: 100%;
}
}
Food Amount: ${cups.toFixed(2)} cups (${grams.toFixed(1)} g)
Breed: ${breed.name}
Typical Weight Range: ${breed.weightRange.min === 0 ? ‘Varies’ : `${breed.weightRange.min}–${breed.weightRange.max} lb`}
Weight: ${weight.toFixed(1)} ${weightUnit} (${(weightKg * 2.20462).toFixed(1)} lb / ${weightKg.toFixed(1)} kg)
Life Stage: ${stage.charAt(0).toUpperCase() + stage.slice(1)}
Activity Level: ${activity.charAt(0).toUpperCase() + activity.slice(1)}
Neuter Status: ${neuter === ‘intact’ ? ‘Intact’ : ‘Neutered/Spayed’}
Food Calories: ${calories} kcal per ${calorieUnit}
Dog Food Calculator
Estimate your dog’s daily food needs based on weight, activity, and life stage. Consult a vet for precise diets.
Puppy (0–1 year)
Adult (1–7 years)
Senior (7+ years)
Low (minimal exercise)
Moderate (daily walks)
High (working/agility dogs)
Enter your dog’s details and food info, then click “Calculate”.
JavaScript is disabled. Please enable it to use the calculator.
(function() {
if (!document.getElementById(‘dog-food-calculator’)) return;
const form = document.getElementById(‘calc-form’);
const breedInput = document.getElementById(‘breed-input’);
const breedValue = document.getElementById(‘breed-value’);
const autocompleteList = document.getElementById(‘autocomplete-list’);
const weightInput = document.getElementById(‘weight’);
const weightUnits = document.getElementsByName(‘weight-unit’);
const lifeStage = document.getElementById(‘life-stage’);
const activityLevel = document.getElementById(‘activity-level’);
const neuterStatus = document.getElementsByName(‘neuter-status’);
const foodCalories = document.getElementById(‘food-calories’);
const calorieUnits = document.getElementsByName(‘calorie-unit’);
const resultDiv = document.getElementById(‘result’);
const breeds = [
{ name: ‘Affenpinscher’, weightRange: { min: 7, max: 10 } },
{ name: ‘Afghan Hound’, weightRange: { min: 50, max: 60 } },
{ name: ‘Airedale Terrier’, weightRange: { min: 50, max: 70 } },
{ name: ‘Akita’, weightRange: { min: 70, max: 130 } },
{ name: ‘Alaskan Malamute’, weightRange: { min: 75, max: 85 } },
{ name: ‘American Bulldog’, weightRange: { min: 60, max: 100 } },
{ name: ‘American Eskimo Dog’, weightRange: { min: 6, max: 35 } },
{ name: ‘American Foxhound’, weightRange: { min: 60, max: 70 } },
{ name: ‘American Hairless Terrier’, weightRange: { min: 12, max: 16 } },
{ name: ‘American Staffordshire Terrier’, weightRange: { min: 40, max: 70 } },
{ name: ‘Anatolian Shepherd Dog’, weightRange: { min: 80, max: 150 } },
{ name: ‘Appenzeller Sennenhund’, weightRange: { min: 48, max: 70 } },
{ name: ‘Australian Cattle Dog’, weightRange: { min: 35, max: 50 } },
{ name: ‘Australian Shepherd’, weightRange: { min: 40, max: 65 } },
{ name: ‘Australian Terrier’, weightRange: { min: 12, max: 18 } },
{ name: ‘Azawakh’, weightRange: { min: 33, max: 55 } },
{ name: ‘Barbet’, weightRange: { min: 35, max: 65 } },
{ name: ‘Basenji’, weightRange: { min: 22, max: 24 } },
{ name: ‘Basset Hound’, weightRange: { min: 40, max: 65 } },
{ name: ‘Beagle’, weightRange: { min: 20, max: 30 } },
{ name: ‘Bearded Collie’, weightRange: { min: 45, max: 55 } },
{ name: ‘Beauceron’, weightRange: { min: 70, max: 110 } },
{ name: ‘Bedlington Terrier’, weightRange: { min: 17, max: 23 } },
{ name: ‘Belgian Laekenois’, weightRange: { min: 55, max: 65 } },
{ name: ‘Belgian Malinois’, weightRange: { min: 40, max: 80 } },
{ name: ‘Belgian Sheepdog’, weightRange: { min: 45, max: 75 } },
{ name: ‘Belgian Tervuren’, weightRange: { min: 45, max: 75 } },
{ name: ‘Bergamasco Sheepdog’, weightRange: { min: 57, max: 84 } },
{ name: ‘Berger Picard’, weightRange: { min: 50, max: 70 } },
{ name: ‘Bernese Mountain Dog’, weightRange: { min: 70, max: 115 } },
{ name: ‘Bichon Frise’, weightRange: { min: 12, max: 18 } },
{ name: ‘Black and Tan Coonhound’, weightRange: { min: 65, max: 100 } },
{ name: ‘Black Russian Terrier’, weightRange: { min: 80, max: 130 } },
{ name: ‘Bloodhound’, weightRange: { min: 80, max: 110 } },
{ name: ‘Bluetick Coonhound’, weightRange: { min: 45, max: 80 } },
{ name: ‘Boerboel’, weightRange: { min: 110, max: 200 } },
{ name: ‘Border Collie’, weightRange: { min: 30, max: 55 } },
{ name: ‘Border Terrier’, weightRange: { min: 11, max: 15 } },
{ name: ‘Borzoi’, weightRange: { min: 60, max: 105 } },
{ name: ‘Boston Terrier’, weightRange: { min: 12, max: 25 } },
{ name: ‘Bouvier des Flandres’, weightRange: { min: 70, max: 110 } },
{ name: ‘Boxer’, weightRange: { min: 50, max: 80 } },
{ name: ‘Boykin Spaniel’, weightRange: { min: 25, max: 40 } },
{ name: ‘Bracco Italiano’, weightRange: { min: 55, max: 90 } },
{ name: ‘Briard’, weightRange: { min: 55, max: 100 } },
{ name: ‘Brittany’, weightRange: { min: 30, max: 40 } },
{ name: ‘Brussels Griffon’, weightRange: { min: 8, max: 10 } },
{ name: ‘Bull Terrier’, weightRange: { min: 50, max: 70 } },
{ name: ‘Bulldog’, weightRange: { min: 40, max: 50 } },
{ name: ‘Bullmastiff’, weightRange: { min: 100, max: 130 } },
{ name: ‘Cairn Terrier’, weightRange: { min: 13, max: 14 } },
{ name: ‘Canaan Dog’, weightRange: { min: 35, max: 55 } },
{ name: ‘Cane Corso’, weightRange: { min: 90, max: 120 } },
{ name: ‘Cardigan Welsh Corgi’, weightRange: { min: 25, max: 38 } },
{ name: ‘Cavalier King Charles Spaniel’, weightRange: { min: 13, max: 18 } },
{ name: ‘Cesky Terrier’, weightRange: { min: 14, max: 24 } },
{ name: ‘Chesapeake Bay Retriever’, weightRange: { min: 55, max: 80 } },
{ name: ‘Chihuahua’, weightRange: { min: 2, max: 6 } },
{ name: ‘Chinese Crested’, weightRange: { min: 8, max: 12 } },
{ name: ‘Chinese Shar-Pei’, weightRange: { min: 45, max: 60 } },
{ name: ‘Chow Chow’, weightRange: { min: 45, max: 70 } },
{ name: ‘Clumber Spaniel’, weightRange: { min: 55, max: 85 } },
{ name: ‘Cocker Spaniel’, weightRange: { min: 20, max: 30 } },
{ name: ‘Collie’, weightRange: { min: 50, max: 75 } },
{ name: ‘Coton de Tulear’, weightRange: { min: 8, max: 15 } },
{ name: ‘Curly-Coated Retriever’, weightRange: { min: 60, max: 95 } },
{ name: ‘Dachshund’, weightRange: { min: 16, max: 32 } },
{ name: ‘Dalmatian’, weightRange: { min: 45, max: 70 } },
{ name: ‘Dandie Dinmont Terrier’, weightRange: { min: 18, max: 24 } },
{ name: ‘Danish-Swedish Farmdog’, weightRange: { min: 15, max: 20 } },
{ name: ‘Doberman Pinscher’, weightRange: { min: 60, max: 100 } },
{ name: ‘Dogue de Bordeaux’, weightRange: { min: 100, max: 150 } },
{ name: ‘English Cocker Spaniel’, weightRange: { min: 26, max: 34 } },
{ name: ‘English Foxhound’, weightRange: { min: 60, max: 75 } },
{ name: ‘English Setter’, weightRange: { min: 45, max: 80 } },
{ name: ‘English Springer Spaniel’, weightRange: { min: 40, max: 50 } },
{ name: ‘Entlebucher Mountain Dog’, weightRange: { min: 40, max: 65 } },
{ name: ‘Field Spaniel’, weightRange: { min: 35, max: 50 } },
{ name: ‘Finnish Lapphund’, weightRange: { min: 33, max: 53 } },
{ name: ‘Finnish Spitz’, weightRange: { min: 20, max: 33 } },
{ name: ‘Flat-Coated Retriever’, weightRange: { min: 60, max: 70 } },
{ name: ‘French Bulldog’, weightRange: { min: 16, max: 28 } },
{ name: ‘German Pinscher’, weightRange: { min: 25, max: 45 } },
{ name: ‘German Shepherd Dog’, weightRange: { min: 50, max: 90 } },
{ name: ‘German Shorthaired Pointer’, weightRange: { min: 45, max: 70 } },
{ name: ‘German Wirehaired Pointer’, weightRange: { min: 50, max: 70 } },
{ name: ‘Giant Schnauzer’, weightRange: { min: 60, max: 85 } },
{ name: ‘Glen of Imaal Terrier’, weightRange: { min: 32, max: 40 } },
{ name: ‘Golden Retriever’, weightRange: { min: 55, max: 75 } },
{ name: ‘Gordon Setter’, weightRange: { min: 45, max: 80 } },
{ name: ‘Grand Basset Griffon Vendéen’, weightRange: { min: 40, max: 45 } },
{ name: ‘Great Dane’, weightRange: { min: 110, max: 175 } },
{ name: ‘Great Pyrenees’, weightRange: { min: 85, max: 115 } },
{ name: ‘Greater Swiss Mountain Dog’, weightRange: { min: 85, max: 140 } },
{ name: ‘Greyhound’, weightRange: { min: 60, max: 70 } },
{ name: ‘Harrier’, weightRange: { min: 45, max: 60 } },
{ name: ‘Havanese’, weightRange: { min: 7, max: 13 } },
{ name: ‘Ibizan Hound’, weightRange: { min: 45, max: 50 } },
{ name: ‘Icelandic Sheepdog’, weightRange: { min: 20, max: 30 } },
{ name: ‘Irish Red and White Setter’, weightRange: { min: 50, max: 70 } },
{ name: ‘Irish Setter’, weightRange: { min: 60, max: 70 } },
{ name: ‘Irish Terrier’, weightRange: { min: 25, max: 27 } },
{ name: ‘Irish Water Spaniel’, weightRange: { min: 45, max: 68 } },
{ name: ‘Irish Wolfhound’, weightRange: { min: 105, max: 180 } },
{ name: ‘Italian Greyhound’, weightRange: { min: 7, max: 15 } },
{ name: ‘Japanese Chin’, weightRange: { min: 7, max: 11 } },
{ name: ‘Keeshond’, weightRange: { min: 35, max: 45 } },
{ name: ‘Kerry Blue Terrier’, weightRange: { min: 33, max: 40 } },
{ name: ‘Komondor’, weightRange: { min: 80, max: 100 } },
{ name: ‘Kuvasz’, weightRange: { min: 70, max: 115 } },
{ name: ‘Labrador Retriever’, weightRange: { min: 55, max: 80 } },
{ name: ‘Lagotto Romagnolo’, weightRange: { min: 24, max: 35 } },
{ name: ‘Lakeland Terrier’, weightRange: { min: 15, max: 17 } },
{ name: ‘Lancashire Heeler’, weightRange: { min: 9, max: 17 } },
{ name: ‘Leonberger’, weightRange: { min: 90, max: 170 } },
{ name: ‘Lhasa Apso’, weightRange: { min: 12, max: 18 } },
{ name: ‘Lowchen’, weightRange: { min: 8, max: 18 } },
{ name: ‘Maltese’, weightRange: { min: 4, max: 7 } },
{ name: ‘Manchester Terrier’, weightRange: { min: 12, max: 22 } },
{ name: ‘Mastiff’, weightRange: { min: 120, max: 230 } },
{ name: ‘Miniature American Shepherd’, weightRange: { min: 20, max: 40 } },
{ name: ‘Miniature Bull Terrier’, weightRange: { min: 18, max: 28 } },
{ name: ‘Miniature Pinscher’, weightRange: { min: 8, max: 10 } },
{ name: ‘Miniature Schnauzer’, weightRange: { min: 11, max: 20 } },
{ name: ‘Mixed/Other’, weightRange: { min: 0, max: 0 } },
{ name: ‘Mudi’, weightRange: { min: 18, max: 29 } },
{ name: ‘Neapolitan Mastiff’, weightRange: { min: 110, max: 150 } },
{ name: ‘Newfoundland’, weightRange: { min: 100, max: 150 } },
{ name: ‘Norfolk Terrier’, weightRange: { min: 11, max: 12 } },
{ name: ‘Norwegian Buhund’, weightRange: { min: 26, max: 40 } },
{ name: ‘Norwegian Elkhound’, weightRange: { min: 48, max: 55 } },
{ name: ‘Norwegian Lundehund’, weightRange: { min: 13, max: 15 } },
{ name: ‘Norwich Terrier’, weightRange: { min: 10, max: 12 } },
{ name: ‘Nova Scotia Duck Tolling Retriever’, weightRange: { min: 35, max: 50 } },
{ name: ‘Old English Sheepdog’, weightRange: { min: 60, max: 100 } },
{ name: ‘Otterhound’, weightRange: { min: 80, max: 115 } },
{ name: ‘Papillon’, weightRange: { min: 5, max: 10 } },
{ name: ‘Parson Russell Terrier’, weightRange: { min: 13, max: 17 } },
{ name: ‘Pekingese’, weightRange: { min: 7, max: 14 } },
{ name: ‘Pembroke Welsh Corgi’, weightRange: { min: 24, max: 30 } },
{ name: ‘Petit Basset Griffon Vendéen’, weightRange: { min: 25, max: 40 } },
{ name: ‘Pharaoh Hound’, weightRange: { min: 45, max: 55 } },
{ name: ‘Plott Hound’, weightRange: { min: 40, max: 60 } },
{ name: ‘Pointer’, weightRange: { min: 45, max: 75 } },
{ name: ‘Polish Lowland Sheepdog’, weightRange: { min: 30, max: 50 } },
{ name: ‘Pomeranian’, weightRange: { min: 3, max: 7 } },
{ name: ‘Poodle’, weightRange: { min: 10, max: 70 } },
{ name: ‘Portuguese Podengo Pequeno’, weightRange: { min: 9, max: 13 } },
{ name: ‘Portuguese Water Dog’, weightRange: { min: 35, max: 60 } },
{ name: ‘Pug’, weightRange: { min: 14, max: 18 } },
{ name: ‘Puli’, weightRange: { min: 25, max: 35 } },
{ name: ‘Pumi’, weightRange: { min: 22, max: 29 } },
{ name: ‘Pyrenean Mastiff’, weightRange: { min: 120, max: 240 } },
{ name: ‘Pyrenean Shepherd’, weightRange: { min: 15, max: 30 } },
{ name: ‘Rat Terrier’, weightRange: { min: 10, max: 25 } },
{ name: ‘Redbone Coonhound’, weightRange: { min: 45, max: 70 } },
{ name: ‘Rhodesian Ridgeback’, weightRange: { min: 70, max: 85 } },
{ name: ‘Rottweiler’, weightRange: { min: 80, max: 135 } },
{ name: ‘Russell Terrier’, weightRange: { min: 9, max: 15 } },
{ name: ‘Saint Bernard’, weightRange: { min: 120, max: 180 } },
{ name: ‘Saluki’, weightRange: { min: 40, max: 65 } },
{ name: ‘Samoyed’, weightRange: { min: 35, max: 65 } },
{ name: ‘Schipperke’, weightRange: { min: 10, max: 16 } },
{ name: ‘Scottish Deerhound’, weightRange: { min: 75, max: 110 } },
{ name: ‘Scottish Terrier’, weightRange: { min: 18, max: 22 } },
{ name: ‘Sealyham Terrier’, weightRange: { min: 23, max: 24 } },
{ name: ‘Shetland Sheepdog’, weightRange: { min: 15, max: 25 } },
{ name: ‘Shiba Inu’, weightRange: { min: 17, max: 23 } },
{ name: ‘Shih Tzu’, weightRange: { min: 9, max: 16 } },
{ name: ‘Siberian Husky’, weightRange: { min: 35, max: 60 } },
{ name: ‘Silky Terrier’, weightRange: { min: 8, max: 10 } },
{ name: ‘Skye Terrier’, weightRange: { min: 35, max: 45 } },
{ name: ‘Sloughi’, weightRange: { min: 35, max: 50 } },
{ name: ‘Smooth Fox Terrier’, weightRange: { min: 15, max: 18 } },
{ name: ‘Soft Coated Wheaten Terrier’, weightRange: { min: 30, max: 40 } },
{ name: ‘Spanish Water Dog’, weightRange: { min: 31, max: 49 } },
{ name: ‘Spinone Italiano’, weightRange: { min: 60, max: 80 } },
{ name: ‘Staffordshire Bull Terrier’, weightRange: { min: 24, max: 38 } },
{ name: ‘Standard Schnauzer’, weightRange: { min: 30, max: 50 } },
{ name: ‘Sussex Spaniel’, weightRange: { min: 35, max: 45 } },
{ name: ‘Swedish Vallhund’, weightRange: { min: 20, max: 35 } },
{ name: ‘Tibetan Mastiff’, weightRange: { min: 90, max: 150 } },
{ name: ‘Tibetan Spaniel’, weightRange: { min: 9, max: 15 } },
{ name: ‘Tibetan Terrier’, weightRange: { min: 20, max: 24 } },
{ name: ‘Toy Fox Terrier’, weightRange: { min: 3.5, max: 7 } },
{ name: ‘Treeing Walker Coonhound’, weightRange: { min: 50, max: 70 } },
{ name: ‘Vizsla’, weightRange: { min: 44, max: 60 } },
{ name: ‘Weimaraner’, weightRange: { min: 55, max: 90 } },
{ name: ‘Welsh Springer Spaniel’, weightRange: { min: 35, max: 55 } },
{ name: ‘Welsh Terrier’, weightRange: { min: 20, max: 21 } },
{ name: ‘West Highland White Terrier’, weightRange: { min: 15, max: 20 } },
{ name: ‘Whippet’, weightRange: { min: 25, max: 40 } },
{ name: ‘Wire Fox Terrier’, weightRange: { min: 15, max: 18 } },
{ name: ‘Wirehaired Pointing Griffon’, weightRange: { min: 45, max: 70 } },
{ name: ‘Wirehaired Vizsla’, weightRange: { min: 45, max: 65 } },
{ name: ‘Xoloitzcuintli’, weightRange: { min: 10, max: 55 } },
{ name: ‘Yorkshire Terrier’, weightRange: { min: 4, max: 7 } }
];
function populateAutocomplete(query = ”) {
autocompleteList.innerHTML = ”;
const filteredBreeds = breeds.filter(b => b.name.toLowerCase().includes(query.toLowerCase()));
filteredBreeds.forEach(breed => {
const item = document.createElement(‘div’);
item.className = ‘autocomplete-item’;
item.textContent = breed.name;
item.setAttribute(‘role’, ‘option’);
item.addEventListener(‘click’, () => {
breedInput.value = breed.name;
breedValue.value = breed.name;
autocompleteList.innerHTML = ”;
});
autocompleteList.appendChild(item);
});
}
breedInput.addEventListener(‘input’, () => {
populateAutocomplete(breedInput.value);
});
breedInput.addEventListener(‘focus’, () => {
populateAutocomplete(breedInput.value);
});
document.addEventListener(‘click’, (e) => {
if (!breedInput.contains(e.target) && !autocompleteList.contains(e.target)) {
autocompleteList.innerHTML = ”;
}
});
function getSelectedUnit(units) {
for (const unit of units) {
if (unit.checked) return unit.value;
}
return units[0].value;
}
function calculate() {
resultDiv.className = ”;
resultDiv.innerHTML = ”;
try {
const breedName = breedValue.value || breedInput.value;
const weight = parseFloat(weightInput.value);
const weightUnit = getSelectedUnit(weightUnits);
const stage = lifeStage.value;
const activity = activityLevel.value;
const neuter = getSelectedUnit(neuterStatus);
const calories = parseFloat(foodCalories.value);
const calorieUnit = getSelectedUnit(calorieUnits);
if (!breedName) {
throw new Error(‘Please select a breed.’);
}
if (!weight || weight <= 0) {
throw new Error('Please enter a valid weight.');
}
if (!calories || calories b.name.toLowerCase() === breedName.toLowerCase()) || breeds.find(b => b.name === ‘Mixed/Other’);
let weightKg = weightUnit === ‘kg’ ? weight : weight / 2.20462;
// Calculate RER (Resting Energy Requirement): 70 * (weightKg ^ 0.75)
const rer = 70 * Math.pow(weightKg, 0.75);
// MER multipliers based on life stage, activity, and neuter status
const multipliers = {
puppy: { low: 2.5, moderate: 3.0, high: 3.5 },
adult: {
intact: { low: 1.6, moderate: 1.8, high: 2.0 },
neutered: { low: 1.4, moderate: 1.6, high: 1.8 }
},
senior: { low: 1.2, moderate: 1.4, high: 1.6 }
};
let mer;
if (stage === ‘puppy’) {
mer = rer * multipliers.puppy[activity];
} else if (stage === ‘adult’) {
mer = rer * multipliers.adult[neuter][activity];
} else {
mer = rer * multipliers.senior[activity];
}
// Calculate food amount
let cups, grams;
if (calorieUnit === ‘cup’) {
cups = mer / calories;
grams = cups * 120; // Approximate: 1 cup ~ 120g (varies by food)
} else {
grams = (mer / calories) * 1000; // kcal/g to grams
cups = grams / 120;
}
if (isNaN(mer) || mer <= 0 || isNaN(cups) || isNaN(grams)) {
throw new Error('Invalid calculation. Check inputs.');
}
// Feeding tips based on life stage
let tips;
if (stage === 'puppy') {
tips = [
'Feed 3–4 small meals daily to support growth.',
'Use puppy-specific food with higher protein.',
'Monitor weight to adjust portions as they grow.',
'Consult a vet for breed-specific needs.'
];
} else if (stage === 'adult') {
tips = [
'Feed 1–2 meals daily to maintain weight.',
'Adjust portions if weight changes noticeably.',
'Ensure food meets AAFCO standards.',
'Provide fresh water at all times.'
];
} else {
tips = [
'Feed 2–3 smaller meals to aid digestion.',
'Consider senior formulas for joint health.',
'Watch for weight gain due to lower activity.',
'Consult a vet for health-related diet tweaks.'
];
}
resultDiv.innerHTML = `
Daily Calories: ${Math.round(mer)} kcalFood Amount: ${cups.toFixed(2)} cups (${grams.toFixed(1)} g)
Breed: ${breed.name}
Typical Weight Range: ${breed.weightRange.min === 0 ? ‘Varies’ : `${breed.weightRange.min}–${breed.weightRange.max} lb`}
Weight: ${weight.toFixed(1)} ${weightUnit} (${(weightKg * 2.20462).toFixed(1)} lb / ${weightKg.toFixed(1)} kg)
Life Stage: ${stage.charAt(0).toUpperCase() + stage.slice(1)}
Activity Level: ${activity.charAt(0).toUpperCase() + activity.slice(1)}
Neuter Status: ${neuter === ‘intact’ ? ‘Intact’ : ‘Neutered/Spayed’}
Food Calories: ${calories} kcal per ${calorieUnit}
Feeding Tips:
`;
resultDiv.className = ‘success’;
document.getElementById(‘copy-btn’).addEventListener(‘click’, () => {
const text = `
Dog Food Calculator Results
Breed: ${breed.name}
Daily Calories: ${Math.round(mer)} kcal
Food Amount: ${cups.toFixed(2)} cups (${grams.toFixed(1)} g)
Typical Weight Range: ${breed.weightRange.min === 0 ? ‘Varies’ : `${breed.weightRange.min}–${breed.weightRange.max} lb`}
Weight: ${weight.toFixed(1)} ${weightUnit} (${(weightKg * 2.20462).toFixed(1)} lb / ${weightKg.toFixed(1)} kg)
Life Stage: ${stage.charAt(0).toUpperCase() + stage.slice(1)}
Activity Level: ${activity.charAt(0).toUpperCase() + activity.slice(1)}
Neuter Status: ${neuter === ‘intact’ ? ‘Intact’ : ‘Neutered/Spayed’}
Food Calories: ${calories} kcal per ${calorieUnit}
Feeding Tips:
${tips.map(tip => `- ${tip}`).join(‘\n’)}
`.trim();
navigator.clipboard.writeText(text).then(() => {
alert(‘Results copied to clipboard!’);
});
});
} catch (error) {
resultDiv.innerHTML = `Error: ${error.message}`;
resultDiv.className = ‘error’;
}
}
function reset() {
form.reset();
breedInput.value = ”;
breedValue.value = ”;
autocompleteList.innerHTML = ”;
weightUnits[0].checked = true;
calorieUnits[0].checked = true;
neuterStatus[0].checked = true;
lifeStage.value = ‘puppy’;
activityLevel.value = ‘low’;
resultDiv.className = ”;
resultDiv.innerHTML = ‘Enter your dog’s details and food info, then click “Calculate”.’;
breedInput.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();
}
});
})();
-
${tips.map(tip => `
- ${tip} `).join(”)}