Food & Cooking

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Turkey Size Calculator.

Calculate raw turkey mass from guests and explicit serving, trim, and leftovers factors.

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Results update as you type.

How to Use

Raw mass = guests × edible serving × (1 + leftovers) ÷ (1 − bone/trim fraction). This is a planning equation, not food-safety guidance.

Enter values from your recipe, measurement, or planning convention. This page does not provide food-safety or nutrition advice.

Use Cases

Planning Thanksgiving Dinner

Determine the exact turkey size needed for your holiday gathering, ensuring you have enough for all guests and desired leftovers without excessive waste.

Example: For 12 guests with 1 lb servings, 20% trim, and 10% leftovers, you'd need about 15.8 lbs of raw turkey.

Catering or Meal Prep

Calculate turkey quantities for events or meal prep, adjusting for specific serving sizes and waste to avoid under or over-ordering.

Example: For 50 guests with 0.75 lb servings, 15% trim, and no leftovers, you'd need about 44.1 lbs.

Frequently Asked Questions

How does the Turkey Size Calculator work?
You input the number of guests, the serving size per guest (in pounds or kilograms), the trim factor (percentage of weight lost during preparation), and the leftovers factor (how much extra you want). The calculator multiplies the guest count by the serving size, then adjusts for trim and leftovers to give you the total raw turkey mass needed.
What is the trim factor in turkey size calculation?
The trim factor accounts for the weight lost when removing bones, skin, or other inedible parts before cooking. For example, if you expect 20% waste, you enter 0.20. The calculator increases the raw weight so you end up with the desired cooked meat after trimming.
Can I use this calculator for any type of turkey?
Yes, the calculator works for whole turkeys, turkey breasts, or any cut, as long as you adjust the serving size and trim factor accordingly. For a whole turkey, typical serving size is about 1 pound (450g) per person, and trim factor might be around 0.30 to account for bones and skin.

Tips & Common Mistakes

Tips

  • Use a serving size of 1 pound (450g) per guest for a whole turkey with bones, and 0.5-0.75 pounds (225-340g) for boneless turkey breast.
  • Set the trim factor to 0.30 for whole turkey (bones and skin), 0.10 for boneless breast, and 0.20 for bone-in breast.
  • If you love leftovers, set the leftovers factor to 0.20-0.30 (20-30% extra) to ensure plenty of turkey for sandwiches and soups.
  • Always round up the calculated raw weight to the nearest available turkey size in the store.

Common Mistakes to Avoid

  • Forgetting to include the trim factor, leading to underestimating the raw weight and running out of meat.
  • Using the same serving size for bone-in and boneless turkey without adjusting for the bone weight.
  • Not accounting for leftovers when planning for a large group, resulting in insufficient turkey for second helpings.

Last updated: August 13, 2026