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Ingredient purchase weight after trimming loss

Estimate untrimmed grams to buy from usable raw grams needed and your measured preparation yield. Whole-gram rounding, clear examples and limits.

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Editable example

An example is filled in. Replace it with your own data to calculate.

Enter the usable raw weight needed after peeling or deboning, then the measured yield for the same food and preparation. An 80% yield means 100 g leaves 80 g. This is only an example, not a universal food standard; weigh a sample if the yield is unknown.

Enter usable raw grams after peeling or deboning, before cooking, not the original untrimmed weight. For 800 g needed, enter 800. Multiply kilograms by 1000 first. Up to three decimal places.
If 1000 g of this batch leaves 800 g after trimming, enter 80 for 80% yield. Do not enter the 20% loss or the fraction 0.8. Weigh a sample if unknown. Do not use cooked-weight or water-absorption ratios.

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Example result

Estimated untrimmed weight to buy (rounded up to whole g)

1,000g

The main answer is the estimated original ingredient weight, rounded up to whole grams. It is not cooked servings, a package count or a guaranteed yield. Trimming loss uses the unrounded weight; no extra reserve is added.

Usable raw weight needed after trimming800 g
Assumed preparation yield80 %
Unrounded original weight to buy1000 g
Estimated trimming loss (unrounded basis)200 g

Worked steps

  1. 800 ÷ (80 ÷ 100) ≈ 1000
  2. 1000 → 1000

Original weight equals required usable weight divided by (yield percent/100). The main answer rounds upward to whole grams using exact decimal arithmetic. Estimated trimming loss uses the unrounded original weight minus the usable weight, with no added reserve or package rounding. The headline gives whole grams to buy under your assumption. Details retain small amounts instead of showing them as zero. Formula decimals do not imply equal scale accuracy or a guaranteed harvest from the next batch. Actual quality and trimming methods can change yield. Use only weight-reducing raw preparation such as peeling and deboning. Excludes cooking expansion, rice water absorption, fermentation and volume-to-weight conversion. Weigh the same food and preparation first; separately allow any reserve or whole-pack purchase. Trimmings may have another use. This is not a nutrition, storage-safety or meal-program eligibility decision.

Method and scope

The main answer is the estimated original ingredient weight, rounded up to whole grams. It is not cooked servings, a package count or a guaranteed yield. Trimming loss uses the unrounded weight; no extra reserve is added.

Use only weight-reducing raw preparation such as peeling and deboning. Excludes cooking expansion, rice water absorption, fermentation and volume-to-weight conversion. Weigh the same food and preparation first; separately allow any reserve or whole-pack purchase. Trimmings may have another use. This is not a nutrition, storage-safety or meal-program eligibility decision.

References:BCcampus culinary textbook: usable weight and yield、USDA: purchase quantity from usable weight and rounding up

What this tool helps you do

Plan how much untrimmed ingredient to buy when a recipe specifies usable raw weight. Peeling and deboning can reduce weight. Use a measured yield to reverse that loss; this does not rescale a whole recipe or compare shop prices.

What to enter

Enter usable raw grams and the percentage left after the same preparation. If a 1000 g batch leaves 800 g, the yield is 80%, not the 20% loss. No food lookup is built in; the default is a synthetic example, not a standard for any ingredient.

How it is calculated

Original weight equals required usable weight divided by (yield percent/100). The main answer rounds upward to whole grams using exact decimal arithmetic. Estimated trimming loss uses the unrounded original weight minus the usable weight, with no added reserve or package rounding.

Worked example

Synthetic example: 800 g of usable raw ingredient at 80% yield needs 1000 g before trimming, with 200 g loss. For 2000 g at 61%, the unrounded estimate is about 3278.69 g and the main answer rounds up to 3279 g. These assumed percentages are not universal food yields.

Understanding the answer

The headline gives whole grams to buy under your assumption. Details retain small amounts instead of showing them as zero. Formula decimals do not imply equal scale accuracy or a guaranteed harvest from the next batch. Actual quality and trimming methods can change yield.

Scope and limitations

Use only weight-reducing raw preparation such as peeling and deboning. Excludes cooking expansion, rice water absorption, fermentation and volume-to-weight conversion. Weigh the same food and preparation first; separately allow any reserve or whole-pack purchase. Trimmings may have another use. This is not a nutrition, storage-safety or meal-program eligibility decision.

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