Serving Size Calculator
How much food for how many people. Finally, an answer.
How much chicken per person? How much rice for a dinner party? How many appetizers do I need for 20 guests? These questions come up every time you cook for more than yourself, and most of us over-buy or under-cook because we have no framework.
This calculator gives you per-person portion recommendations based on industry standards used by caterers and restaurants. Enter the number of guests, pick the type of meal (appetizer, main course, buffet), and see how much of each common ingredient to prepare: meat, pasta, rice, potatoes, vegetables, salad, bread.
The calculator distinguishes between hearty eaters and lighter crowds, accounts for whether there is a main protein or the dish is the protein, and factors in how many courses you are serving. It is especially useful for buffets (where portion planning is hardest) and catering (where 10-20% waste margin matters).
Recommended quantities
Adjust guests and settings above
Per-Person Standards
Industry reference for moderate appetite adults.
| Category | Weight | Imperial |
|---|---|---|
| Meat (boneless, main) | 170-225 g | 6-8 oz |
| Meat (with bone) | 225-340 g | 8-12 oz |
| Pasta (dry) | 85-115 g | 3-4 oz |
| Rice (dry) | 60-75 g | 1/4 cup |
| Potatoes | 150-200 g | 5-7 oz |
| Vegetables (cooked) | 90-125 g | 3-4.5 oz |
| Salad | 60-90 g | 2-3 oz |
| Bread | 1-2 slices | - |
| Appetizers (if dinner served) | 3-4 pieces | - |
| Appetizers (as the meal) | 10-12 pieces | - |
Advertisement
The Reference
Serving sizes are based on USDA dietary guidelines and professional catering standards. A standard portion assumes moderate appetite and a main-course context. Adjust for demographics: teenagers and athletes eat 30 to 50% more; older adults and light eaters may eat 30% less.
For buffets, increase everything by 20 to 30% to account for multiple helpings and choice variety. Always prepare 10 to 15% extra beyond your calculation for safety.
How Professional Caterers Calculate Portions
Professional caterers use standardized per-person quantities developed over decades of experience. For a seated dinner with a main protein, the industry standard is 170-225 g of boneless meat per person (6-8 ounces). For bone-in cuts, allow 225-340 g (8-12 ounces) to account for the bone weight. These figures are for adults with moderate appetites.
Buffets require 20-30% more food than plated meals because guests naturally take more than one serving and because choice variety encourages eating more of each item. For a 3-hour cocktail party, plan 8-12 appetizer pieces per person assuming no main meal is served; 3-4 pieces if appetizers are pre-dinner only.
Kid-heavy gatherings average out to roughly adult portions minus 20-30% total. Teenagers eat as much as adults, sometimes more. Very elderly guests may eat 30-40% less. Our calculator provides a starting point; adjust based on your knowledge of your specific guests.
How to Use
- Enter the number of guests.
- Select meal type and appetite level.
- Get recommended quantities per category.
Frequently Asked Questions
How much meat per person for dinner?
For a boneless main protein (chicken breast, steak, fish fillet): 170-225 g per person (6-8 oz). For bone-in meat: 225-340 g (8-12 oz). Kids under 12 need about half these amounts. Teenagers and athletes may need 30-50% more.
How much rice per person?
For a side: 60-75 g dry rice per person (about 1/4 cup), which cooks to approximately 3/4 cup. For a main dish (rice as the star): double that to 120-150 g.
How many appetizers per person for a party?
If dinner is being served afterward: 3-4 appetizers per person. If appetizers are the entire meal: 10-12 pieces per person. For a 3-hour cocktail party with no dinner: plan for 12-15 pieces per person.
Should I round up or down?
Always round up. Running short in the middle of a dinner party is far worse than having leftovers. Plan 10-15% extra for any gathering, 20-30% for buffets.
Does this work for kid-heavy gatherings?
Mostly, but reduce all quantities by about 30-40% for children under 10. Teenagers eat as much as adults, sometimes more. Mixed-age events usually average out to adult portions.
Related Tools
Advertisement