Plums yield: how much is usable after prep (AP to EP %)
Plums: about 94% usable going whole to pitted, with a published range of 91–98%. That is a cost factor of 1.06: for every kilo you need ready to use, buy 1.06 kg as purchased.
Typical yield94%
Cost factor (AP ÷ EP)1.06
Lost in prep6%
Yield by preparation stage
| Stage | Average | Range | What is lost | USDA item |
|---|---|---|---|---|
| Plums, whole → pitted | 94% | 91–98% | Stones | 1881 |
| Damsons, whole → pitted | 92% | 89–96% | Stones | 1882 |
Stones are only about 6% of a plum, so plums are one of the cheaper fruits to prep.
What the yield does to the cost
| Usable plums needed | Buy (as purchased) at 94% |
|---|---|
| 1 kg | 1.06 kg |
| 5 kg | 5.32 kg |
| 10 kg | 10.64 kg |
Use 94% in the yield calculator →
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, items 1881, 1882 (US samples of fresh plums and damsons). Your own case is the real number: weigh it in the yield calculator.
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