Select your food type (fruit, vegetable, or meat), enter the slice thickness and dehydrator temperature, and this Dehydrator Time Calculator estimates your total drying time in hours. You'll also see the recommended temperature range and doneness tips for your chosen food category. Also try the Cooling Time Calculator (Food Service).
Estimated Drying Time
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Recommended Temp Range
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Doneness Check
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Temperature varies by food type. Fruits and vegetables are typically dried at 52–60°C (125–140°F), meats and jerky at 68–74°C (155–165°F), and delicate herbs at 35–46°C (95–115°F). Using the correct temperature preserves flavour and nutrients while ensuring food safety. See also our Hot Holding Temperature Calculator.
Yes — it's one of the biggest factors. Thinner slices (3–4 mm) can dry in half the time of thicker slices (10+ mm). Consistent, uniform slicing is key to even drying across all trays. A mandoline slicer helps achieve consistent thickness.
Absolutely. Too low a temperature can leave moisture inside food, risking mould or spoilage. Too high a temperature can 'case harden' the outside — sealing moisture inside — while leaving the interior under-dried. Staying in the recommended range ensures safe, shelf-stable results.
Single-temperature dehydrators are common and still work well. Check the temperature against the recommendations for your specific food. You may need to adjust your drying time — lower temperatures require longer runs, while higher temperatures dry faster but need more monitoring. You might also find our Fermentation Temperature Calculator useful.
Some nutrients, particularly heat-sensitive vitamins like Vitamin C, are reduced during dehydrating. However, dehydrating is generally considered one of the more nutrient-preserving preservation methods compared to canning or high-heat cooking. Minerals and fibre remain largely intact.
Different foods have different doneness tests. Fruit should be pliable and leathery with no moist spots. Vegetables should be crisp or hard. Jerky should bend without breaking but show no raw, moist areas. Always let food cool completely before testing — warm food feels softer than it actually is.
Yes, a fully loaded dehydrator restricts airflow compared to a lightly loaded one, which can add 1–2 hours to your drying time. Ensure trays aren't overloaded and food pieces aren't overlapping for the most efficient drying.
High ambient humidity (above 60%) significantly slows drying because the surrounding air is already moisture-rich and less able to absorb moisture from the food. On humid days, expect drying times to increase by 20–40%. If possible, run your dehydrator in an air-conditioned or well-ventilated space.