Live tool
Recipe Scaling Calculator
Scale an ingredient amount from an original yield to a new target yield.
New Amount = Original Amount x (Target Yield / Original Yield)
Open calculatorCatering
Catering Portion Calculator
Estimate total food quantity from guest count, serving size, and a planning buffer.
Catering portion calculator
Estimate total food quantity from guest count, portion size, and buffer.
Example presets Load example values to see how the calculator works.
Results Updates after calculation
What this means
Results will appear here with a practical note about what to check next.
Worked example
Example calculation
For 50 buffet guests at 6 ounces each with a 12% buffer, plan for 336 ounces, or about 21 pounds. That is roughly three full-pan checkpoints if one pan holds about 10 pounds.
Formula
Calculator formula
Total food needed
Total Ounces = Guests x Portion Ounces x (1 + Buffer %)Planned portions
Planned Portions = Guests x (1 + Buffer %)Steps
How to use this tool
- 01
Enter the guest count or use a 25, 50, or 100 guest shortcut.
- 02
Choose a portion preset or enter the serving size you plan to serve.
- 03
Choose the service style to apply a practical default buffer.
- 04
Review pounds, planned portions, and rough pan or tray estimates before purchasing.
Watchouts
Common mistakes
Using the same buffer for plated and buffet service.
Forgetting children, staff meals, or vendor meals.
Ignoring menu mix when there are multiple entrees.
Planning context
How service style changes the estimate
Buffets usually need more buffer because guests self-serve and portions vary.
Plated meals can usually use a tighter buffer because the kitchen controls every portion.
Appetizers and desserts depend heavily on event length, menu mix, and whether a full meal is also served.
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Move to the next calculator when this result needs another pricing, portion, or yield check.
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Kitchen Unit Converter
Convert kitchen weights, volumes, temperatures, and volume-to-weight ingredient estimates for prep, costing, and recipe scaling.
Converted Amount = Amount x Unit Conversion Factor
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Related guides
Use these guides when you want the assumptions and examples behind the calculator.
How to Price Catering by Guest Count
Estimate catering prices by connecting guest count, portion needs, food cost, labor, service style, and margin.
Read guideHow Much Food to Serve for 50 Guests
Estimate food quantities for 50 guests by portion size, service style, menu mix, and buffer.
Read guideFrequently asked questions
How much buffer should I add for catering?
A 5% to 15% buffer is common, but buffet service, long events, and uncertain counts may need more.
Does this replace a full production sheet?
No. Use it as a planning estimate, then check recipes, menu mix, holding time, and service style.
How is buffet planning different from plated service?
Buffets usually need a larger buffer because guests self-serve uneven portions. Plated service can often use a tighter buffer because the kitchen controls each plate.
How much food should I plan for 50 guests?
Start with the portion size for the main item. For example, 50 guests at 6 ounces each need 300 ounces, or 18.75 pounds, before adding a buffet or service buffer.
What portion size should I enter?
Use the edible serving size per guest for the item you are planning. Choose a larger buffer for buffet service, long events, uncertain counts, or popular items that guests may revisit.