Fish Yield Calculator Fishery Tools
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Fish yield calculator

Turn raw seafood weight into edible weight, loss, and effective cost in seconds.

Enter a simple yield percentage or detailed losses, save company standards in the browser, and combine multiple lots on one screen.

Use a simple yield percentage or a detailed loss breakdown Start with guide presets by category and processing mode Save company standards in your browser Total multiple lots, export CSV, print, or share a URL

What the calculator covers

Calculate edible weight, loss weight, raw cost, and effective cost per edible kilogram from one lot.
Start with a guide preset, then replace it with your own measured loss ratios.
Save and reuse company standards without sending data to a server.
Combine purchase lots and see the aggregate effective cost instantly.
Work across Japanese and English pages with locale-aware number and currency formatting.

How to use

  1. Enter raw weight, choose the seafood category, and select the processing mode.
  2. In Simple mode, enter edible yield %. In Detailed mode, adjust each loss item.
  3. Add unit price and, if needed, portion size to see effective cost and estimated servings.
  4. Save the loss set as a company standard or export the result as CSV or print view.

Examples

Simple example

Input

Raw 10 kg, edible yield 62%, raw unit price 1,800 JPY/kg

Output

Edible 6.20 kg, loss 3.80 kg, effective cost 2,903.23 JPY/kg

Detailed example

Input

Raw 8 kg, head 18%, guts 10%, skeleton 14%, surface 4%, drip 2%, other 2%

Output

Yield 50.0%, edible 4.00 kg, loss 4.00 kg

Multiple-lot total

Input

Lot A 10 kg at 62%, Lot B 8 kg at 50%, total raw cost 35,600 JPY

Output

Total edible 10.20 kg, aggregate effective cost 3,490.20 JPY/kg

Glossary

Edible portion

The weight that remains usable for the final dish or product.

Yield

The percentage of the raw item that remains as edible portion.

Loss breakdown

The split of non-edible parts such as head, guts, bones, shell, and moisture loss.

Effective cost per edible kg

The raw cost divided by the edible weight, expressed per edible kilogram.

Company standard

A saved set of measured loss ratios used by your team.

Formulas

  • Edible weight = Raw weight × (edible % ÷ 100)
  • Loss weight = Raw weight − Edible weight
  • Raw cost = Raw weight × Raw unit price
  • Effective cost per edible kg = Raw cost ÷ Edible weight
  • Estimated servings = Edible weight (g) ÷ Portion size (g)

Frequently asked questions

What if my species is not in the list?

Choose the nearest category, enter the species name, adjust the losses, and save the result as your own standard.

How is round different from fillet?

Each processing mode starts from a different typical loss pattern. Actual yield still depends on size, fat content, freshness, tools, and operator technique.

Can I combine multiple lots?

Yes. Use Multiple Lots mode to add rows; the calculator will total edible weight and aggregate effective cost.

Are the built-in presets exact?

No. They are guides only. Register your own measured ratios as company standards for day-to-day use.

Is any data sent to a server?

No. Calculations, company standards, and exports all run inside the browser.

Can I use this outside Japan?

Yes. The page supports English and Japanese, locale-aware number formatting, and metric or pound-based input for weights and unit price.

Important notes

  • Yield changes with fish size, fat content, freshness, tools, machine settings, and operator technique.
  • Built-in presets are guides only. Measured company standards should replace them whenever possible.
  • Taxes, freight, exchange rates, and reuse of trim or scraps are outside this calculation.
  • When multiple lots use different currencies, the calculator does not produce an aggregate cost figure.