150-Guest Backyard Buffet with Cake
Inputs
Result
50 guests × 1.0 lb = 50 lbs food. 50 × 4 = 200 drinks. ceil(50/8) = 7 tables. 50 servings = full sheet cake.
Guests
50
Food
50 lbs
Tables
7
Drinks
200
Party Supply Summary
50 Guests
750 sq ft venue space
Food
50 lbs
Tables
7
Cake
Full sheet






As an Amazon Associate, we earn from qualifying purchases.
Inputs
Result
50 guests × 1.0 lb = 50 lbs food. 50 × 4 = 200 drinks. ceil(50/8) = 7 tables. 50 servings = full sheet cake.
Inputs
Result
25 × 0.5 = 12.5 → 13 lbs. 25 × 3 = 75 drinks. ceil(25/8) = 4 tables. Balloons: ceil(25×0.5) + 12 = 25.
Plan 0.5–1 pound of food per guest depending on meal style. Finger foods need 0.5 lbs per person; a full buffet needs 1 lb. For 50 guests with a buffet, prepare 50 lbs of food. A casual BBQ falls in between at 0.75 lbs per guest.
| Guests | Finger Foods | BBQ | Buffet |
|---|---|---|---|
| 25 | 13 lbs | 19 lbs | 25 lbs |
| 50 | 25 lbs | 38 lbs | 50 lbs |
| 75 | 38 lbs | 57 lbs | 75 lbs |
| 100 | 50 lbs | 75 lbs | 100 lbs |
A 1/4 sheet cake serves up to 24 guests, 1/2 sheet serves up to 48, and a full sheet serves up to 96. For 50 guests, order a full sheet cake. If you have more than 96 guests, add a second sheet cake or supplement with cupcakes.
Plan 3–4 drinks per guest for a party lasting 3–4 hours. For 50 guests at a buffet, prepare 200 drinks. Offer a mix of water (40%), soft drinks (40%), and juice or lemonade (20%). For outdoor parties in summer, increase to 5 drinks per person.
Plan 1 standard 8-seat table per 8 guests. For 50 guests you need 7 tables and 50 chairs. For backyard parties, allow 15 sq ft per guest; for restaurants/halls, 12 sq ft. A 50-person backyard party needs about 750 sq ft of usable space.
Read our guide
Read our guide
Read our guide
General party food planner
Cake size by servings
Drink quantity planner
Explore all our free event planning and utility tools
Last Updated: Mar 20, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.