About Easy Party Calc

Easy Party Calc is a set of free calculators for party, holiday and event planning: turkey size, thawing and roasting time, ham, meat and barbecue per person, pizzas, wings, sandwiches, side dishes, appetizers and grazing boards, cakes and cupcakes, coffee, punch, soft drinks and ice, wine, beer and liquor, tables, chairs, tablecloths, tents, dance floors and lights. It exists to answer the question you have with a guest list in one hand and a shopping list in the other: how much do I actually need?

The numbers are planning estimates. Portion sizes start from published figures — USDA’s Food Safety and Inspection Service for turkey, ham and food safety, the USDA Food Buying Guide for how much cooked meat a pound of raw meat gives, university extension “cooking for a crowd” tables for side dishes and drinks, NIAAA for what counts as one drink, and manufacturers and serving charts such as Wilton’s for cakes. Each calculator lists its sources, and every per-person amount is an editable input, because your crowd is not an average one. Round up for big eaters, and when it comes to food safety, a thermometer has the final word.

It is part of a small family of free project calculators that began with Easy Scale Calc (opens in a new tab). The site is supported by advertising and by Amazon affiliate links on product suggestions (as an Amazon Associate it earns from qualifying purchases); neither changes what the calculators say. If you spot an error or want a calculator added, the contact page is the place to say so.

How we build and check the calculators

• Every calculator runs entirely in your browser — nothing you type is sent anywhere.
• Each page shows its formula, and every result shows the working with your own numbers, so you can check it by hand.
• Portions start from published figures — USDA FSIS, the USDA Food Buying Guide, university extension quantity tables, NIAAA and manufacturers’ charts — linked on each page. Every per-person amount is an editable input, and packages, bottles and pans are rounded up.
• Food safety figures (the 2-hour rule, safe holding temperatures, thawing and roasting times) are quoted from USDA’s Food Safety and Inspection Service and are not adjusted. A food thermometer has the final word.
• Every calculator is tested in both US and metric units, and every worked example is recomputed at build time so the numbers on the page always match the calculator.

How this content is made

The calculators, worked examples and guides on this site were drafted with the help of AI tools and then checked in several passes. Every number on a worked-example page is recomputed from the calculator at build time, so the text and the calculator can’t disagree. Published figures (USDA thawing and roasting tables, cooked-meat yields, serving charts, standard bottle and keg sizes) are checked against the linked sources.

Automated checks run on every build: each calculator is tested in US and metric units and unit switching must round-trip exactly. If you find an error, tell us — corrections are fixed and logged below.

Sources we use

• Iowa State University Extension (AnswerLine) — Graduation party tips (opens in a new tab) — Per person: sandwich meat 3–4 oz, sliders 1.5–2 oz, burgers 4–6 oz, sides 4–6 oz; 1 to 1.5 lb of food per guest; soda 2 cans and water 2 bottles per hour; punch 6 oz.
• Utah State University Extension — Five tips for food safety at holiday buffets (opens in a new tab) — Hold hot food at 140 °F or warmer and cold food at 40 °F or colder; 2 hours at room temperature; several small platters; replace rather than add.
• Wilton — Cake baking and serving guide (opens in a new tab) — Party (about 1½ × 2 in) and wedding (about 1 × 2 in) servings for 4 in high cakes by pan shape and size; 3–6 in high cakes give the same servings, under 3 in half; batter per layer.
• Wilton — Wedding cake guide (opens in a new tab) — Wedding servings for 2-layer tiers; an average 2-layer cake mix yields 4 to 5½ cups of batter; fill pans ½ to ⅔ full.
• Wilton — How to cut a round cake (opens in a new tab) — Cut a circle 2 in in from the edge, slice the ring into about 1½ in pieces, repeat, and cut the 6 in center into 12 wedges.
• Wisconsin Cheese (Dairy Farmers of Wisconsin) — How to build a perfect cheese board (opens in a new tab) — 0.5 to 1 oz of each cheese per person; closer to 0.5 oz with lots of other food; three to five cheeses.
• Wisconsin Cheese (Dairy Farmers of Wisconsin) — Charcuterie and cheese board basics (opens in a new tab) — One ounce of each cheese and at least two ounces of charcuterie per person, scaled to the other dishes served.
• USDA FNS — Food Buying Guide for Child Nutrition Programs, Section 1 (Meats/Meat Alternates) yield table (opens in a new tab) — Cooked lean meat per lb as purchased: Boston butt bone-in 0.52, boneless 0.60; brisket ¼ in trim 0.46, practically free of fat 0.69; ground beef ≤20% fat 0.74; spareribs 0.39; chicken thighs 0.52, drumsticks 0.49, breast halves 0.66, whole chicken 0.44; turkey breast 0.64; boneless fully cooked ham 0.90; chuck roast boneless 0.63; frankfurters 8 or 10 per lb.
• Clay County, Minnesota — Amounts of food to serve fifty (cooking for large groups) (opens in a new tab) — Quantity table for 50 servings, built on a 3 oz cooked meat serving; sides, rolls, desserts, punch and lemonade.
• FoodSafety.gov — Safe Minimum Internal Temperature Chart (reviewed Dec. 2022; copy hosted by the Virginia Department of Health) (opens in a new tab) — Poultry and stuffing 165 °F; pork, beef and raw ham 145 °F with a 3-minute rest; ground meat 160 °F; leftovers 165 °F.
• U.S. Consumer Product Safety Commission — Holiday decorating safety (CPSC 611) (opens in a new tab) — Use lights tested by an independent laboratory; no more than three standard-size sets of lights per extension cord; never put electric lights on a metallic tree.
• U.S. CPSC — Happy holidays start with safety (2025 news release) (opens in a new tab) — Never string together more than three sets of incandescent lights, and never overload outlets.
• Electrical Safety Foundation International — Top 10 holiday safety tips (opens in a new tab) — Never connect more than three strings of incandescent lights; look for UL, CSA or ETL certification labels.
• Hamilton Beach — Commercial coffee urn (40, 60 and 100 cup) use and care manual (opens in a new tab) — 1 cup = 5 oz (150 ml). Ground coffee by water level: 20 cups 1½–2 cups (110–147 g) … 100 cups 6½–7 cups (478–515 g). Percolates within 8 minutes.
• Hamilton Beach — 45 cup coffee urn manual (opens in a new tab) — Brew at least 15 cups; allow about one minute per cup of brewing time.
• Specialty Coffee Association — Understanding coffee sweetness (opens in a new tab) — Brewing at a ratio of 55 g of coffee per litre.
• University of Missouri Extension — In a Pinch: Food Yields (MP563) (opens in a new tab) — 1 lb of coffee makes about 40 to 50 servings.
• LSU AgCenter — Enjoying Louisiana Crawfish (Pub. 2353; copy hosted by Texas A&M) (opens in a new tab) — 3–4 lb of live crawfish per person per meal; about 15% tail meat (8–20%); 6–7 lb live per lb of tails; 35–45 lb sacks; one sack serves 10–12.
• NC Sea Grant — Seafood: how much to buy and serve (opens in a new tab) — Per 3½ oz serving: headed shrimp ½ lb; cooked peeled shrimp ¼ lb; live crabs 1–2 lb.
• Wilton — How to make perfect cupcakes (opens in a new tab) — One box mix or standard recipe makes about 2 dozen standard cupcakes (¼–⅓ cup batter each), about 5 dozen mini or about 1 dozen jumbo; fill about two-thirds full.
• Betty Crocker — Super Moist yellow cake mix (opens in a new tab) — One box makes one 13 × 9 cake, two 8 or 9 in rounds, or 24 cupcakes (14–18 minutes); 30 at high altitude.
• Bright Event Rentals — Event planning guide (2025) (opens in a new tab) — Seats: 48 in round 6–8, 60 in 8–10, 66 in 9–11, 72 in 10–12, 6 ft × 30 in 6–8, 8 ft × 30 in 8–10; tables 30 in high; floor space per table (60 in round 10 ft, 72 in round 11 ft, 6 ft table 11 × 7 ft, 8 ft table 13 × 7 ft); square feet per guest by layout; tent minimums; dance floors; linens.
• Illinois State Fire Marshal — Calculating occupant loads for assembly occupancies (NFPA 101) (opens in a new tab) — Dance floors are a concentrated use: 7 sq ft net per person for occupant-load purposes.
• USDA — Using the Food Guide Pyramid (2000) (opens in a new tab) — 2–3 oz of cooked lean meat, poultry or fish counts as one serving.
• Iowa State University Extension (AnswerLine) — Ham tips (opens in a new tab) — Allow ¼–⅓ lb per serving boneless and ⅓–½ lb bone-in.
• South Dakota State University Extension — Tips for purchasing and preparing turkey, ham and prime rib (opens in a new tab) — Same per-person ranges for boneless and bone-in ham.
• Iowa State University Extension (AnswerLine) — USDA time table for cooking ham (opens in a new tab) — Minutes per pound at 325 °F by type and weight; reheat fully cooked hams from USDA-inspected plants to 140 °F, others to 165 °F; cook-before-eating hams to 145 °F with a 3-minute rest.
• Reddy Ice — How much ice you need for a party (opens in a new tab) — One to two pounds of ice per person attending; outdoor and pool parties need more.
• Reddy Ice — Ice calculator (opens in a new tab) — 1 to 2 lb per person; at least two 7 lb bags for a cooler.
• Home City Ice — Ice calculator (opens in a new tab) — Regular 7 lb and big 20 lb bags.
• YETI — Pack your cooler like a pro (opens in a new tab) — A 2:1 ratio of ice to chilled contents.
• USGS Water Science School — Water density (opens in a new tab) — Ice is about 90% as dense as liquid water.
• KegWorks — Guide to beer keg sizes (opens in a new tab) — Half barrel 15.5 gal (about 165 twelve-ounce pours, 124 pints); quarter 7.75 gal (82 / 62); sixth 5.16 gal (55 / 41); Cornelius 5 gal; 5 L mini keg 1.32 gal (about 14 twelve-ounce pours).
• eCFR 27 CFR 25.11 — Definitions: barrel (Cornell LII copy) (opens in a new tab) — A barrel of beer, as a unit of measure, is 31 U.S. gallons.
• NIAAA — What is a standard drink? (opens in a new tab) — One standard drink holds 0.6 fl oz (14 g) of pure alcohol: 12 fl oz of regular beer (about 5%), 5 fl oz of table wine (about 12%), or 1.5 fl oz of distilled spirits (about 40%).
• CDC — Moderate alcohol use (opens in a new tab) — For adults 21 and older who drink: two drinks or less in a day for men, one or less for women (Dietary Guidelines for Americans).
• eCFR 27 CFR 5.203 — Standards of fill for distilled spirits (Cornell LII copy) (opens in a new tab) — Authorized spirits sizes include 750 mL, 1 L and 1.75 L.
• NIAAA — Understanding the dangers of alcohol overdose (opens in a new tab) — Blood alcohol can keep rising after drinking stops; coffee, cold showers and walking do not reverse it; if you suspect an overdose, call 911 and do not leave the person alone.
• USDA ARS — Table of Cooking Yields for Meat and Poultry (2012) (opens in a new tab) — Weight change on cooking (shrink), bone included: braised brisket flat 69%, grilled ground beef patty 69%, roasted spareribs 76%.
• Domino’s — Nutrition guide (serving sizes by pizza size) (opens in a new tab) — Hand-tossed 12 in medium, 14 in large and 16 in extra large are each listed as 1/8 of a pizza per slice; New York style as 1/6.
• Enbrighten (Jasco) — Café lights FAQ (opens in a new tab) — 24 in between bulbs, an 18 in lead from the plug to the first bulb and a 6 in lead-out; 48 ft strands with 24 bulbs; up to 750 ft can be linked; only outdoor-rated lights are safe outside.
• Brightech — Ambience Pro LED string lights, 48 ft (opens in a new tab) — 24 ft (7 sockets) or 48 ft (15 sockets), sockets 3 ft apart; S14 2 W LED bulbs.
• Lifetime Products — How many chairs will fit around my Lifetime tables? (opens in a new tab) — 48 in round 5 chairs; 60 in round 8; 72 in round 10; 6 ft rectangle 8 (three a side and one at each end); 8 ft rectangle 10; 5 ft rectangle 6.
• Arizona State University Engineering events — Linen size guide (opens in a new tab) — 90 × 132 in banquet linens reach the floor on a 6 ft table; 120 in rounds reach the floor on a 60 in round and come to 6 in from the floor on a 72 in round.
• National Event Pros — Table linens (opens in a new tab) — 6 ft banquet floor-length 90 × 132 in; 8 ft 90 × 154 in; 60 in round floor-length 120 in.
• Urquid Linen — The table matrix (opens in a new tab) — Standard tables are typically 30 in high; a halfway drop is about 15 in, floor-length about 30 in.
• A Classic Party Rental — 6 ft banquet table (opens in a new tab) — 72 × 30 × 30 in; floor length 90 × 132 in; halfway drop 60 × 120 in.
• Magic Linen — Round tablecloth sizes (opens in a new tab) — Table diameter plus twice the drop; 6–8 in drop for casual events, 15 in for formal.
• Anchor Industries — How many people fit in a tent? (event tent capacity chart) (opens in a new tab) — 20 × 20 ft: 60–70 cocktail, 50–58 buffet, 40 sit-down; 30 × 45 ft: 225–270 / 170–190 / 135; 40 × 80 ft: 534–640 / 400–458 / 320. With a dance floor, stage or bar, the next size up.
• USDA FSIS — Let’s Talk Turkey: A Consumer Guide to Safely Roasting a Turkey (copy hosted by UW–Madison Extension) (opens in a new tab) — 1 lb of turkey per person (1¼ lb pre-stuffed); refrigerator thawing about 24 hours per 4–5 lb; cold water 30 minutes per lb; roasting timetable at 325 °F; 165 °F; 20-minute rest; 2-hour rule.
• Nebraska Extension (University of Nebraska–Lincoln) — Turkey 101 (opens in a new tab) — Per person: whole turkey 1 lb, bone-in breast ¾ lb, boneless breast ½ lb, pre-stuffed 1¼ lb.
• eCFR 27 CFR 4.72 — Standards of fill for wine (Cornell LII copy) (opens in a new tab) — Authorized wine container sizes include 750 mL, 1.5 L and 3 L.
• Wilton — How to cut a square cake (opens in a new tab) — Start 2 in from the edge; 1½ to 2 in pieces; works for 9 × 13, 11 × 15 and 12 × 18 in sheets.
• NC Cooperative Extension — Keep those leftovers safe (opens in a new tab) — Bacteria multiply rapidly between 40 °F and 140 °F; refrigerate within two hours; use leftovers within three to four days.

How the site is funded

Easy Party Calc is free and has no sign-up. It is supported by display advertising and by affiliate links — when you buy something through a product link we may earn a small commission at no extra cost to you. Recommendations are chosen for fit with the job, not commission.

Corrections

Spotted a wrong number or an unclear explanation? Tell us — corrections are fixed quickly and logged here.

No corrections logged yet.