What Five Pounds Actually Becomes
Dehydrating removes most of the weight of what goes in, and the proportion varies enough by food that planning by fresh weight produces some memorable surprises.
What five pounds becomes
From the batch yield estimator, starting from 5 lb fresh:
| Food | Dried weight | Retained |
|---|---|---|
| Beef jerky | 1.25–2 lb | 25–40% |
| Poultry jerky | 1.25–1.75 lb | 25–35% |
| Fish jerky | 1–1.5 lb | 20–30% |
| Leafy herbs | 0.5–1 lb | 10–20% |
| Sliced fruit | 0.6–1 lb | 12–20% |
| Mushrooms | 0.4–0.6 lb | 8–12% |
| Sliced vegetables | 0.25–0.5 lb | 5–10% |
Vegetables are the extreme: five pounds of courgette becomes a few ounces. Jerky retains the most, because meat starts with less water than produce and because the protein and fat stay behind.
Planning backwards
The useful direction is from the target. Wanting a pound of jerky means buying three to four pounds of meat; wanting a pound of dried mushrooms means buying eight to twelve.
That second figure is the one that catches people out at a market, and it is worth working out before you are standing in front of the produce rather than after.
Tray space is the real constraint
The estimator takes a tray capacity because volume, not weight, usually limits a batch. Five pounds of sliced courgette occupies far more tray area than five pounds of beef strips, and overcrowding is the most common cause of a batch drying unevenly.
Pieces need air on all sides. A tray packed edge to edge dries from the outside in, leaving the middle of the tray behind — which shows up as a batch where some pieces are brittle and others are still pliable at the same timer.
Fresh weight is not the whole input
The estimate is from prepared weight, and preparation removes more. Stems, cores, pits, peel where you remove it, and the trim off meat all come off before the food reaches a tray.
For jerky the trimming matters twice over: fat does not dry, it goes rancid, so lean cuts trimmed closely are both better keeping and a smaller starting weight than the package suggests.
What the yield tells you about the drying
A batch that comes in well above the predicted range is probably under-dried. That is worth taking seriously rather than treating as a good result, because the moisture that did not leave is the moisture that shortens shelf life.
Weighing a batch in and out costs nothing and gives you a check the timer cannot. Combined with conditioning — jarring the batch for a few days and watching for condensation — it catches most under-dried loads before they are stored.
Feeding it into the rest of the plan
Yield sets the shopping list; the drying time calculator sets the schedule; and for meat the cure and salt calculator works from the fresh weight rather than the dried, since salt and cure are proportioned to what goes in.
Those three numbers together turn a vague afternoon into something you can shop for, and they are worth doing in that order.
Buying for the season
Dehydrating is at its most worthwhile when produce is cheap and abundant, which is exactly when the quantities get out of hand. The yield figures are what keep a glut in proportion — a tray of tomatoes is an afternoon, a crate is a weekend.
Working out the tray-hours before buying is the discipline. A machine with four trays and a 10-hour cycle does four trays a day, and no amount of enthusiasm changes that.
Splitting a large batch
Where a purchase exceeds the machine, the practical answer is to stage it — and to prepare only what will fit the current run. Sliced produce left waiting for tray space is oxidising and, for some foods, browning.
Refrigerating prepared food between runs is fine; leaving it on the counter for hours is a different decision, and one worth avoiding with anything you would not leave out fresh.
Recording actuals
Weigh in and out, and note it. After a few batches you will have your own yields for your own machine and your own preparation, which beat any general table — and a batch that lands above the range is a flag to check the drying rather than a bonus.