Birthday Party Cost Calculator
Take the guesswork out of birthday party planning with this detailed cost calculator. Select your venue type, guest count, and duration, then customize food options from snacks to full catering. Add decorations, entertainment like magicians or bounce houses, and party favors to see your complete budget. Perfect for party planners, event venues, and parents planning memorable celebrations for kids or adults.
Try the Calculator
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export function birthdayPartyCalculator(form: FormTs) {
// Pricing data
const venueBasePrices: Record<string, number> = {
'home': 0,
'park': 50,
'community-center': 150,
'restaurant': 200,
'party-venue': 350,
'trampoline-park': 400,
'bowling': 300,
'arcade': 350,
'escape-room': 400,
'pool': 300
};
const venuePerGuestPrices: Record<string, number> = {
'home': 0,
'park': 0,
'community-center': 0,
'restaurant': 15,
'party-venue': 20,
'trampoline-park': 25,
'bowling': 18,
'arcade': 22,
'escape-room': 30,
'pool': 15
};
form.addRow(row => {
row.addTextPanel('header', {
computedValue: () => 'Birthday Party Cost Calculator',
customStyles: { 'font-size': '1.5rem', 'font-weight': '600', 'color': '#1e293b' }
});
});
form.addSpacer({ height: 20 });
// Party Basics Section
const basicsSection = form.addSubform('basics', { title: '🎂 Party Basics' });
basicsSection.addRow(row => {
row.addDropdown('ageGroup', {
label: 'Birthday Child Age',
options: [
{ id: 'toddler', name: 'Toddler (1-3 years)' },
{ id: 'preschool', name: 'Preschool (4-5 years)' },
{ id: 'kids', name: 'Kids (6-9 years)' },
{ id: 'tweens', name: 'Tweens (10-12 years)' },
{ id: 'teens', name: 'Teens (13-17 years)' },
{ id: 'adult', name: 'Adult (18+)' }
],
defaultValue: 'kids',
isRequired: true
}, '1fr');
row.addInteger('guestCount', {
label: 'Number of Guests',
min: 1,
max: 200,
defaultValue: 15,
isRequired: true,
tooltip: 'Including the birthday child'
}, '1fr');
});
basicsSection.addRow(row => {
row.addDropdown('partyDuration', {
label: 'Party Duration',
options: [
{ id: '1', name: '1 hour' },
{ id: '2', name: '2 hours' },
{ id: '3', name: '3 hours' },
{ id: '4', name: '4 hours' },
{ id: '5', name: 'Half day (5+ hours)' }
],
defaultValue: '2',
isRequired: true
}, '1fr');
row.addDropdown('venue', {
label: 'Venue',
options: [
{ id: 'home', name: 'At Home' },
{ id: 'park', name: 'Park/Outdoor' },
{ id: 'community-center', name: 'Community Center' },
{ id: 'restaurant', name: 'Restaurant/Pizza Place' },
{ id: 'party-venue', name: 'Party Venue/Play Space' },
{ id: 'trampoline-park', name: 'Trampoline Park' },
{ id: 'bowling', name: 'Bowling Alley' },
{ id: 'arcade', name: 'Arcade/Game Center' },
{ id: 'escape-room', name: 'Escape Room' },
{ id: 'pool', name: 'Pool/Water Park' }
],
defaultValue: 'home',
isRequired: true
}, '1fr');
});
// Food & Drinks Section
const foodSection = form.addSubform('food', { title: '🍕 Food & Drinks' });
foodSection.addRow(row => {
row.addDropdown('cakeType', {
label: 'Birthday Cake',
options: [
{ id: 'none', name: 'No Cake' },
{ id: 'homemade', name: 'Homemade ($30)' },
{ id: 'grocery', name: 'Grocery Store Cake ($40)' },
{ id: 'bakery-basic', name: 'Bakery - Basic ($60)' },
{ id: 'bakery-custom', name: 'Bakery - Custom Design ($120)' },
{ id: 'specialty', name: 'Specialty/Themed Cake ($200+)' }
],
defaultValue: 'bakery-basic',
isRequired: true
}, '1fr');
row.addDropdown('foodStyle', {
label: 'Food Style',
options: [
{ id: 'none', name: 'No Food (Cake Only)' },
{ id: 'snacks', name: 'Snacks & Finger Foods ($5/guest)' },
{ id: 'pizza', name: 'Pizza & Drinks ($8/guest)' },
{ id: 'catered-basic', name: 'Basic Catering ($15/guest)' },
{ id: 'catered-full', name: 'Full Catering ($25/guest)' },
{ id: 'bbq', name: 'BBQ/Cookout ($12/guest)' }
],
defaultValue: 'pizza'
}, '1fr');
});
foodSection.addRow(row => {
row.addCheckbox('iceCream', {
label: 'Ice Cream/Sundae Bar',
defaultValue: true,
tooltip: '+$3 per guest'
}, '1fr');
row.addCheckbox('candyBar', {
label: 'Candy/Dessert Bar',
defaultValue: false,
tooltip: '+$4 per guest'
}, '1fr');
});
// Decorations Section
const decorSection = form.addSubform('decorations', { title: '🎈 Decorations & Theme' });
decorSection.addRow(row => {
row.addDropdown('decorLevel', {
label: 'Decoration Level',
options: [
{ id: 'minimal', name: 'Minimal - Basic balloons & banner ($25)' },
{ id: 'standard', name: 'Standard - Theme decorations ($75)' },
{ id: 'elaborate', name: 'Elaborate - Full setup ($150)' },
{ id: 'professional', name: 'Professional Decorator ($300+)' }
],
defaultValue: 'standard'
}, '1fr');
row.addDropdown('theme', {
label: 'Party Theme',
options: [
{ id: 'generic', name: 'Generic Birthday' },
{ id: 'licensed', name: 'Licensed Character (+$30)' },
{ id: 'custom', name: 'Custom Theme (+$50)' }
],
defaultValue: 'generic'
}, '1fr');
});
decorSection.addRow(row => {
row.addCheckbox('balloonArch', {
label: 'Balloon Arch/Garland',
defaultValue: false,
tooltip: '+$80 for professional balloon arrangement'
}, '1fr');
row.addCheckbox('photoBooth', {
label: 'Photo Backdrop/Props',
defaultValue: false,
tooltip: '+$50 for photo booth setup'
}, '1fr');
});
// Entertainment Section
const entertainmentSection = form.addSubform('entertainment', { title: '🎪 Entertainment' });
entertainmentSection.addRow(row => {
row.addDropdown('entertainment', {
label: 'Main Entertainment',
options: [
{ id: 'none', name: 'No Entertainment/Self-Directed' },
{ id: 'diy-games', name: 'DIY Games & Activities ($30)' },
{ id: 'magician', name: 'Magician ($200)' },
{ id: 'clown', name: 'Clown/Face Painter ($150)' },
{ id: 'character', name: 'Character Appearance ($250)' },
{ id: 'dj', name: 'DJ/Music ($300)' },
{ id: 'bounce-house', name: 'Bounce House Rental ($200)' },
{ id: 'petting-zoo', name: 'Petting Zoo ($350)' },
{ id: 'science-show', name: 'Science Show ($275)' },
{ id: 'crafts', name: 'Craft Party ($15/kid)' }
],
defaultValue: 'diy-games'
}, '1fr');
row.addDropdown('activities', {
label: 'Additional Activities',
options: [
{ id: 'none', name: 'None' },
{ id: 'pinata', name: 'Pinata ($35)' },
{ id: 'games', name: 'Party Games Kit ($50)' },
{ id: 'crafts-kit', name: 'Craft Kits ($8/kid)' },
{ id: 'treasure-hunt', name: 'Treasure Hunt Setup ($40)' }
],
defaultValue: 'pinata'
}, '1fr');
});
// Party Favors Section
const favorsSection = form.addSubform('favors', { title: '🎁 Party Favors & Extras' });
favorsSection.addRow(row => {
row.addDropdown('favorBags', {
label: 'Favor Bags',
options: [
{ id: 'none', name: 'No Favor Bags' },
{ id: 'basic', name: 'Basic - Candy & small toys ($5/bag)' },
{ id: 'themed', name: 'Themed Favors ($10/bag)' },
{ id: 'premium', name: 'Premium Gift Bags ($15/bag)' }
],
defaultValue: 'basic'
}, '1fr');
row.addDropdown('invitations', {
label: 'Invitations',
options: [
{ id: 'digital', name: 'Digital/E-vites (Free)' },
{ id: 'printable', name: 'Printable ($10)' },
{ id: 'store', name: 'Store-bought ($15)' },
{ id: 'custom', name: 'Custom Printed ($40)' }
],
defaultValue: 'digital'
}, '1fr');
});
favorsSection.addRow(row => {
row.addCheckbox('thankYouCards', {
label: 'Thank You Cards',
defaultValue: true,
tooltip: '+$15 for matching thank you cards'
}, '1fr');
row.addCheckbox('partyHats', {
label: 'Party Hats & Accessories',
defaultValue: true,
tooltip: '+$20 for hats, noisemakers, etc.'
}, '1fr');
});
form.addSpacer({ height: 20, showLine: true, lineStyle: 'dashed' });
// Cost Breakdown Section
const breakdownSection = form.addSubform('breakdown', { title: '📊 Cost Breakdown', isCollapsible: false });
breakdownSection.addRow(row => {
row.addPriceDisplay('venueCost', {
label: 'Venue',
computedValue: () => {
const venue = basicsSection.dropdown('venue')?.value() || 'home';
const guests = basicsSection.integer('guestCount')?.value() || 15;
const duration = parseInt(basicsSection.dropdown('partyDuration')?.value() || '2');
let base = venueBasePrices[venue] || 0;
const perGuest = venuePerGuestPrices[venue] || 0;
if (venue !== 'home' && venue !== 'park' && duration > 2) {
base += (duration - 2) * 50;
}
return base + (perGuest * guests);
},
variant: 'default'
}, '1fr');
row.addPriceDisplay('foodCost', {
label: 'Food & Cake',
computedValue: () => {
const guests = basicsSection.integer('guestCount')?.value() || 15;
const cake = foodSection.dropdown('cakeType')?.value() || 'bakery-basic';
const food = foodSection.dropdown('foodStyle')?.value() || 'pizza';
const cakePrices: Record<string, number> = {
'none': 0, 'homemade': 30, 'grocery': 40, 'bakery-basic': 60,
'bakery-custom': 120, 'specialty': 200
};
const foodPerGuest: Record<string, number> = {
'none': 0, 'snacks': 5, 'pizza': 8, 'catered-basic': 15,
'catered-full': 25, 'bbq': 12
};
let cost = cakePrices[cake] || 60;
cost += (foodPerGuest[food] || 8) * guests;
if (foodSection.checkbox('iceCream')?.value()) cost += guests * 3;
if (foodSection.checkbox('candyBar')?.value()) cost += guests * 4;
return cost;
},
variant: 'default'
}, '1fr');
});
breakdownSection.addRow(row => {
row.addPriceDisplay('decorCost', {
label: 'Decorations',
computedValue: () => {
const level = decorSection.dropdown('decorLevel')?.value() || 'standard';
const theme = decorSection.dropdown('theme')?.value() || 'generic';
const levelPrices: Record<string, number> = {
'minimal': 25, 'standard': 75, 'elaborate': 150, 'professional': 300
};
let cost = levelPrices[level] || 75;
if (theme === 'licensed') cost += 30;
if (theme === 'custom') cost += 50;
if (decorSection.checkbox('balloonArch')?.value()) cost += 80;
if (decorSection.checkbox('photoBooth')?.value()) cost += 50;
return cost;
},
variant: 'default'
}, '1fr');
row.addPriceDisplay('entertainmentCost', {
label: 'Entertainment',
computedValue: () => {
const guests = basicsSection.integer('guestCount')?.value() || 15;
const entertainment = entertainmentSection.dropdown('entertainment')?.value() || 'diy-games';
const activities = entertainmentSection.dropdown('activities')?.value() || 'pinata';
const entertainmentPrices: Record<string, number> = {
'none': 0, 'diy-games': 30, 'magician': 200, 'clown': 150,
'character': 250, 'dj': 300, 'bounce-house': 200,
'petting-zoo': 350, 'science-show': 275
};
const activityPrices: Record<string, number> = {
'none': 0, 'pinata': 35, 'games': 50, 'treasure-hunt': 40
};
let cost = entertainmentPrices[entertainment] || 0;
if (entertainment === 'crafts') cost = guests * 15;
cost += activityPrices[activities] || 0;
if (activities === 'crafts-kit') cost = guests * 8;
return cost;
},
variant: 'default'
}, '1fr');
});
breakdownSection.addRow(row => {
row.addPriceDisplay('favorsCost', {
label: 'Favors & Extras',
computedValue: () => {
const guests = basicsSection.integer('guestCount')?.value() || 15;
const favors = favorsSection.dropdown('favorBags')?.value() || 'basic';
const invites = favorsSection.dropdown('invitations')?.value() || 'digital';
const favorPrices: Record<string, number> = {
'none': 0, 'basic': 5, 'themed': 10, 'premium': 15
};
const invitePrices: Record<string, number> = {
'digital': 0, 'printable': 10, 'store': 15, 'custom': 40
};
let cost = (favorPrices[favors] || 5) * guests;
cost += invitePrices[invites] || 0;
if (favorsSection.checkbox('thankYouCards')?.value()) cost += 15;
if (favorsSection.checkbox('partyHats')?.value()) cost += 20;
return cost;
},
variant: 'default'
}, '1fr');
row.addPriceDisplay('perGuestCost', {
label: 'Cost Per Guest',
computedValue: () => {
const guests = basicsSection.integer('guestCount')?.value() || 15;
const venue = basicsSection.dropdown('venue')?.value() || 'home';
const duration = parseInt(basicsSection.dropdown('partyDuration')?.value() || '2');
const cake = foodSection.dropdown('cakeType')?.value() || 'bakery-basic';
const food = foodSection.dropdown('foodStyle')?.value() || 'pizza';
const level = decorSection.dropdown('decorLevel')?.value() || 'standard';
const theme = decorSection.dropdown('theme')?.value() || 'generic';
const entertainment = entertainmentSection.dropdown('entertainment')?.value() || 'diy-games';
const activities = entertainmentSection.dropdown('activities')?.value() || 'pinata';
const favors = favorsSection.dropdown('favorBags')?.value() || 'basic';
const invites = favorsSection.dropdown('invitations')?.value() || 'digital';
let total = 0;
// Venue
let base = venueBasePrices[venue] || 0;
const perGuest = venuePerGuestPrices[venue] || 0;
if (venue !== 'home' && venue !== 'park' && duration > 2) {
base += (duration - 2) * 50;
}
total += base + (perGuest * guests);
// Food
const cakePrices: Record<string, number> = {
'none': 0, 'homemade': 30, 'grocery': 40, 'bakery-basic': 60,
'bakery-custom': 120, 'specialty': 200
};
const foodPerGuest: Record<string, number> = {
'none': 0, 'snacks': 5, 'pizza': 8, 'catered-basic': 15,
'catered-full': 25, 'bbq': 12
};
total += cakePrices[cake] || 60;
total += (foodPerGuest[food] || 8) * guests;
if (foodSection.checkbox('iceCream')?.value()) total += guests * 3;
if (foodSection.checkbox('candyBar')?.value()) total += guests * 4;
// Decor
const levelPrices: Record<string, number> = {
'minimal': 25, 'standard': 75, 'elaborate': 150, 'professional': 300
};
total += levelPrices[level] || 75;
if (theme === 'licensed') total += 30;
if (theme === 'custom') total += 50;
if (decorSection.checkbox('balloonArch')?.value()) total += 80;
if (decorSection.checkbox('photoBooth')?.value()) total += 50;
// Entertainment
const entertainmentPrices: Record<string, number> = {
'none': 0, 'diy-games': 30, 'magician': 200, 'clown': 150,
'character': 250, 'dj': 300, 'bounce-house': 200,
'petting-zoo': 350, 'science-show': 275
};
const activityPrices: Record<string, number> = {
'none': 0, 'pinata': 35, 'games': 50, 'treasure-hunt': 40
};
let entCost = entertainmentPrices[entertainment] || 0;
if (entertainment === 'crafts') entCost = guests * 15;
total += entCost;
let actCost = activityPrices[activities] || 0;
if (activities === 'crafts-kit') actCost = guests * 8;
total += actCost;
// Favors
const favorPrices: Record<string, number> = {
'none': 0, 'basic': 5, 'themed': 10, 'premium': 15
};
const invitePrices: Record<string, number> = {
'digital': 0, 'printable': 10, 'store': 15, 'custom': 40
};
total += (favorPrices[favors] || 5) * guests;
total += invitePrices[invites] || 0;
if (favorsSection.checkbox('thankYouCards')?.value()) total += 15;
if (favorsSection.checkbox('partyHats')?.value()) total += 20;
return Math.round(total / guests);
},
variant: 'default'
}, '1fr');
});
// Summary Section
const summarySection = form.addSubform('summary', {
title: '🎉 Total Party Cost',
isCollapsible: false,
sticky: 'bottom'
});
summarySection.addRow(row => {
row.addPriceDisplay('totalCost', {
label: 'Estimated Total',
computedValue: () => {
const guests = basicsSection.integer('guestCount')?.value() || 15;
const venue = basicsSection.dropdown('venue')?.value() || 'home';
const duration = parseInt(basicsSection.dropdown('partyDuration')?.value() || '2');
const cake = foodSection.dropdown('cakeType')?.value() || 'bakery-basic';
const food = foodSection.dropdown('foodStyle')?.value() || 'pizza';
const level = decorSection.dropdown('decorLevel')?.value() || 'standard';
const theme = decorSection.dropdown('theme')?.value() || 'generic';
const entertainment = entertainmentSection.dropdown('entertainment')?.value() || 'diy-games';
const activities = entertainmentSection.dropdown('activities')?.value() || 'pinata';
const favors = favorsSection.dropdown('favorBags')?.value() || 'basic';
const invites = favorsSection.dropdown('invitations')?.value() || 'digital';
let total = 0;
// Venue
let base = venueBasePrices[venue] || 0;
const perGuest = venuePerGuestPrices[venue] || 0;
if (venue !== 'home' && venue !== 'park' && duration > 2) {
base += (duration - 2) * 50;
}
total += base + (perGuest * guests);
// Food
const cakePrices: Record<string, number> = {
'none': 0, 'homemade': 30, 'grocery': 40, 'bakery-basic': 60,
'bakery-custom': 120, 'specialty': 200
};
const foodPerGuest: Record<string, number> = {
'none': 0, 'snacks': 5, 'pizza': 8, 'catered-basic': 15,
'catered-full': 25, 'bbq': 12
};
total += cakePrices[cake] || 60;
total += (foodPerGuest[food] || 8) * guests;
if (foodSection.checkbox('iceCream')?.value()) total += guests * 3;
if (foodSection.checkbox('candyBar')?.value()) total += guests * 4;
// Decor
const levelPrices: Record<string, number> = {
'minimal': 25, 'standard': 75, 'elaborate': 150, 'professional': 300
};
total += levelPrices[level] || 75;
if (theme === 'licensed') total += 30;
if (theme === 'custom') total += 50;
if (decorSection.checkbox('balloonArch')?.value()) total += 80;
if (decorSection.checkbox('photoBooth')?.value()) total += 50;
// Entertainment
const entertainmentPrices: Record<string, number> = {
'none': 0, 'diy-games': 30, 'magician': 200, 'clown': 150,
'character': 250, 'dj': 300, 'bounce-house': 200,
'petting-zoo': 350, 'science-show': 275
};
const activityPrices: Record<string, number> = {
'none': 0, 'pinata': 35, 'games': 50, 'treasure-hunt': 40
};
let entCost = entertainmentPrices[entertainment] || 0;
if (entertainment === 'crafts') entCost = guests * 15;
total += entCost;
let actCost = activityPrices[activities] || 0;
if (activities === 'crafts-kit') actCost = guests * 8;
total += actCost;
// Favors
const favorPrices: Record<string, number> = {
'none': 0, 'basic': 5, 'themed': 10, 'premium': 15
};
const invitePrices: Record<string, number> = {
'digital': 0, 'printable': 10, 'store': 15, 'custom': 40
};
total += (favorPrices[favors] || 5) * guests;
total += invitePrices[invites] || 0;
if (favorsSection.checkbox('thankYouCards')?.value()) total += 15;
if (favorsSection.checkbox('partyHats')?.value()) total += 20;
return total;
},
variant: 'large'
});
});
summarySection.addRow(row => {
row.addTextPanel('disclaimer', {
computedValue: () => 'Prices are estimates based on average costs. Actual prices may vary by location and vendor.',
customStyles: { 'font-size': '0.85rem', 'color': '#64748b', 'text-align': 'center' }
});
});
form.configureSubmitButton({
label: 'Get Party Quote'
});
}
Frequently Asked Questions
What's the average cost of a kids birthday party?
The average kids birthday party costs $300-500 for a home party with 15 guests. Venue-based parties at places like trampoline parks or bowling alleys typically run $500-800 including food and activities.
How many guests should I plan for?
A common rule is to invite one guest per year of age, plus a few extras. For example, a 7-year-old might have 8-10 guests. Always plan for about 70-80% attendance rate.
Is it cheaper to have the party at home?
Yes, home parties are typically 30-50% less expensive than venue parties since there's no rental fee. However, venue parties often include cleanup and some entertainment in the package.
Can I customize this calculator for my party planning business?
Absolutely! Adjust pricing to match your local market, add your specific venue options, and embed it on your party planning website to help clients estimate costs.
What entertainment is best for different ages?
Toddlers enjoy character appearances and simple games. Kids 6-9 love bounce houses and magicians. Tweens prefer arcade parties or escape rooms. Teens enjoy DJ parties or unique venues.