Kids Parties Calculators
Plan party bags, games, crafts, prizes, and all the supplies for a brilliant kids party.
Party Bag Calculator
Calculate party bag contents and quantities for each child at your kids party. Plan sweets, toys and treats per bag. Free online calculator.
Game Supplies Calculator
Work out all the supplies needed for kids party games and activities, from musical statues to pass the parcel. Free online planning calculator.
Craft Activity Calculator
Plan craft materials and supplies for each child at your party, including paint, paper, glue and decorating items. Free online calculator.
Prize Calculator
Estimate how many prizes and rewards you need for kids party games and competitions. Budget for winners and runners-up. Free online calculator.
Cake Candle Calculator
Calculate birthday cake candles, sparklers, toppers and decorations needed for your celebration. Get the perfect cake display. Free online calculator.
Helium Balloon Calculator
Work out the right helium tank size and number of balloons for your kids party or celebration. Includes float time estimates. Free online calculator.
Pinata Calculator
Calculate how many sweets, toys and fillers you need for your party pinata based on the number of children attending. Free online calculator.
Face Paint Calculator
Estimate face paint colours, brushes, sponges and supplies needed for your kids party based on guest numbers and designs. Free online calculator.
Bouncy Castle Calculator
Work out the right bouncy castle size for your kids party based on the number of children, ages and available garden space. Free online calculator.
Party Hat Calculator
Calculate how many party hats, crowns, tiaras and accessories you need for your kids party including spares. Free online party calculator.
10 free calculators in Kids Parties
Planning a Brilliant Kids Party
Kids parties require careful planning to keep children entertained and happy. The key is having enough activities, food, and party bag contents for every child, with spares for unexpected extras.
Party bags should contain 5-8 items each — a mix of sweets, small toys, stickers, and perhaps a slice of birthday cake. For games, plan more activities than you think you need as some will be over quicker than expected. A good rule is 1 organised game per 10-15 minutes of party time.
Helium balloons are always popular but deflate after 8-12 hours, so time your inflation carefully. A standard helium canister (disposable) fills about 30 standard 28cm balloons. Our calculators help you plan every detail so the day runs smoothly.