Butternut squash yield: how much is usable after prep (AP to EP %)
Butternut squash: about 84% usable going whole to peeled, deseeded flesh, with a published range of 75–88%. That is a cost factor of 1.19: for every kilo you need ready to use, buy 1.19 kg as purchased.
Yield by preparation stage
| Stage | Average | Range | What is lost | USDA item |
|---|---|---|---|---|
| Whole → raw flesh (peeled, deseeded) | 84% | 75–88% | Seeds, rind, trimmings and handling loss | 2459 |
Butternut gives much better flesh yield than acorn squash (74%, item 2457) or the big winter squashes (64%, item 2460).
Prep notes
Cut the neck from the bulb first: the neck is solid flesh and peels cleanly with a Y-peeler, while the bulb holds the seeds. Peel just past the green streaks; going deeper wastes flesh without improving anything.
What the yield does to the cost
Butternut squash, 10 kg at £10.99 (JJ Foodservice, 10 Oct 2026) is £1.10 a kilo as purchased. At 84% usable that is £1.31 per usable kilo.
Worked example: 150 g of roast squash for a salad or side needs 179 g as purchased, costing 20p. Costed on the bought weight it would read 16p, so the costing would be 16% light: 3p a portion, or £3.14 over 100 portions.
| Usable butternut squash needed | Buy (as purchased) at 84% |
|---|---|
| 1 kg | 1.19 kg |
| 5 kg | 5.95 kg |
| 10 kg | 11.9 kg |
Use 84% in the yield calculator →
Typical uses
Roasted squash for salads and sides, soup, risotto, curries and vegetarian pie fillings.
Storage and the trim
Whole squash keeps for weeks somewhere cool and dry, not the fridge. Once cut, wrap and refrigerate; use peeled, diced squash within three days. The seeds roast as a garnish; peel and fibres go to stock or waste.
Yield source: USDA Agriculture Handbook No. 102, Food Yields Summarized by Different Stages of Preparation (Matthews and Garrison, USDA Agricultural Research Service, 1975), Table 1, item 2459 (US samples of whole butternut squash). Prices as stated, read on 10 Oct 2026. Your own case is the real number: weigh it in the yield calculator.
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