Homestead Dehydrator Load Calculator
Created by: Daniel Hayes
Last updated:
Convert fresh produce to dried yield, count loads, and schedule dehydrator runtime with tray capacity and shrink ratios built in.
Homestead Dehydrator Load Calculator
UtilityApplicationWhat is a Homestead Dehydrator Load Calculator?
A Homestead Dehydrator Load Calculator converts fresh produce weight into dried yield, estimates how many loads you will run, and totals the machine hours required. By combining fresh-to-dry shrink ratios with tray capacity, it answers how much food you can dry per batch, how long it will take, and how much shelf-stable product you will store. It is built for homesteaders planning large harvest weeks, bulk buys, or pantry kits.
Dried Weight = Fresh Weight ÷ Ratio
Fresh Needed for Target = Target Dried × Ratio
Per-Load Capacity = Trays × Tray Capacity × Produce Load Factor
Loads Needed = Fresh Weight ÷ Per-Load Capacity
Total Dry Time = Loads × Hours per Load
Use it to avoid overloading trays, to schedule overnight runs, and to decide whether to pre-freeze or blanch certain items for speed and quality.
How It Works
Select a produce type to load shrink ratio and typical drying time. Enter fresh pounds, tray count, tray style, and an optional target dried amount. The calculator multiplies tray capacity by a load factor to avoid overfilling, then divides fresh weight by that capacity to find loads. It multiplies loads by a realistic hours-per-load figure to estimate total dehydrator runtime.
Charts and tables show how different foods shrink and how much space you save compared with canning jars, helping you plan shelves and oxygen absorbers for long-term storage.
Example Calculations
Tomatoes, 20 lb fresh, 9 round trays: Ratio 12:1 gives ~1.7 lb dried. Per-load capacity ~12 lb fresh. Loads: 1.7. Hours: ~17. Dry across two runs to avoid stacking too thick.
Apples, 15 lb, 9 trays: Ratio 7:1 yields ~2.1 lb dried. Capacity ~12 lb fresh → 1.3 loads. Total time ~10-11 hours. One day run with midday rotation covers it.
Herbs, 5 lb basil, 9 trays: Ratio 6:1 gives ~0.8 lb dried. Capacity per load is reduced (factor 0.4) to keep a thin layer, so per-load is ~5 lb. One load at ~4 hours finishes the batch.
Common Applications
- Schedule harvest weeks to avoid overnight overruns and wet trays.
- Plan bulk apple, tomato, or grape processing before purchasing produce.
- Size dehydrator loads for jerky-style thin slices vs thick fruit leather trays.
- Estimate oxygen absorbers and jar count for dried pantry kits.
- Compare space saved versus canning or freezing for long-term storage.
Tips for Reliable Drying
- Blanch vegetables (beans, carrots) to keep color and cut time; do not blanch herbs.
- Slice uniformly; thicker slices add hours and can trap moisture in the center.
- Rotate trays halfway for stacked home units without forced airflow.
- Condition finished product for 5-7 days before sealing with oxygen absorbers.
- Store jars in a cool, dark spot; label with product, date, and batch weight.
Frequently Asked Questions
How do I estimate dried yield from fresh produce?
Use the fresh-to-dry ratios common to each product. Tomatoes shrink around 12:1, apples 7:1, grapes 4:1, mushrooms 10:1, and most vegetables 7-8:1 after blanching. Multiply fresh pounds by 1 ÷ ratio to get dried pounds. This calculator applies those ratios automatically.
How many dehydrator loads will I need?
Loads depend on tray count, tray size, and produce thickness. A 9-tray round unit holds roughly 12-14 lb of tomatoes per load. If you have 20 lb fresh tomatoes, expect 1-2 loads. The tool multiplies tray capacity by a produce load factor to avoid overfilling.
How long should each load run?
Tomatoes, onions, and carrots typically need 8-10 hours at 125-135°F. Grapes can take 18-30 hours unless you crack skins. Herbs are done in 3-5 hours at 95-105°F. The calculator uses a realistic time per load for planning total machine hours.
What if I want a target amount of dried food?
Enter the target dried weight and the calculator back-solves the fresh weight required using the ratio for your produce. This is helpful when building pantry kits for soups, trail mixes, or long-term storage jars.
How should I condition dried foods?
After drying, cool produce, place loosely in jars, and shake daily for 5-7 days. If condensation appears, return to the dehydrator. Conditioning equalizes moisture and prevents mold in storage.
Can I mix different foods in one load?
Avoid mixing items with very different drying times or strong aromas (onions with apples). Pair similar moisture foods to prevent uneven drying and flavor transfer. Rotate trays halfway to keep airflow even.
How much space does dried food save?
Drying often reduces volume by 80-90%. Tomatoes and apples shrink dramatically, while grapes still reduce to roughly a quarter of their starting weight. The calculator compares space saved versus canning to help plan pantry shelves.
Sources and References
- National Center for Home Food Preservation. Drying Fruits and Vegetables at Home, 2024.
- University of Georgia Extension. So Easy to Preserve: Dehydration Guidelines, 2025.
- Washington State University Extension. Dehydrating Fruits and Vegetables, 2023.
- USDA Complete Guide to Home Canning, Appendix on Dehydration, 2024.