Cold Storage Shelf-Life Calculator & How Long Will It Keep?
Keeps fresh apples
See how long produce keeps at any storage temperature and humidity, how that compares to room temperature, and the optimum conditions — with chilling-injury and freezing warnings.
At 2 °C and 90% RH, apple keeps about 150 days (21 weeks) — Acceptable — shorter life. That's roughly 8.2× longer than leaving it at room temperature (25 °C).
Next: hold near 0 °C and 92% RH for the longest life. Humidity is in the good range.
Model: respiration roughly doubles per 10 °C (Q10), so life shortens as it warms. Reference values from USDA Handbook 66.
Cold storage — key facts
- Q10 rule
- life ≈ halves per +10 °C
- Cold-tolerant crops
- best near 0 °C
- Tropical fruit
- 12–14 °C (chill-sensitive)
- Most produce RH
- 90–98%
- Onion / garlic RH
- 65–75% (keep dry)
- Freezing point
- ≈ −0.5 to −2 °C
- Reference
- USDA Handbook 66
- Privacy
- Runs in your browser; nothing uploaded
Store cold enough — but not too cold
Fresh produce is alive after harvest — it keeps respiring, and the faster it respires the faster it ages. Cooling slows that down, which is why a cold room can stretch shelf life from days to months. The catch is that each crop has its own sweet spot: cold-tolerant crops like apples and carrots keep longest near 0 °C, but tropical fruits suffer chilling injury below 10–13 °C even though they're nowhere near freezing.
This tool combines each commodity's published optimum with a Q10 respiration model to estimate the shelf life at your temperature and humidity, shows how many times longer that is than room temperature, and warns when you're risking chilling or freezing damage. Use it to set a fridge, farm cold room or cold-chain target, then pair with the Grain Storage Capacity and Grain Moisture tools for your dry produce.
Set the cold room
Dial in the temperature and humidity each crop actually wants.
Avoid costly mistakes
Catch chilling injury and freezing before they spoil a batch.
Plan the cold chain
Know how many days you have to sell or move the produce.
Justify the cooling
See how many times longer it keeps versus leaving it warm.
Frequently Asked Questions
How does temperature affect storage life?+
Cooling slows respiration and decay. As a rule of thumb, the respiration rate roughly doubles for every 10 °C rise (the Q10 effect), so storage life roughly halves. This tool uses each commodity's optimum life and a Q10 model to estimate how many days it keeps at your chosen temperature.
What is chilling injury?+
Many warm-climate crops — banana, mango, tomato, citrus — are damaged if stored below a critical temperature (often 7–13 °C), even though that's above freezing. Symptoms include pitting, browning, failure to ripen and decay. The tool flags chilling injury and won't let cold mislead you into over-cooling sensitive crops.
Why does humidity matter in storage?+
Most fresh produce keeps best at high humidity (90–98% RH) to prevent shrivelling and weight loss. A few crops — onion, garlic, pumpkin — keep better dry (65–75% RH) to avoid sprouting and rot. The tool shows each commodity's optimum RH and warns if your humidity is too high or too low.
What is the best temperature for my produce?+
It varies: apples, grapes, carrots and leafy greens keep best near 0 °C; potatoes around 4–7 °C; bananas, mangoes and tomatoes at 12–14 °C. The tool displays the optimum temperature, humidity and shelf life for each commodity so you can set your cold room correctly.
How accurate are these shelf-life numbers?+
They're planning estimates based on published optima (USDA Agriculture Handbook 66 and FAO guidelines) and a Q10 model. Real shelf life also depends on variety, maturity at harvest, handling, disease pressure and packaging — so treat the figure as a reliable guide, not a guarantee.
Can produce freeze in cold storage?+
Yes — most fresh produce freezes around −0.5 to −2 °C, and freezing ruptures cells, causing collapse and decay on thawing. Keep storage temperatures above the commodity's freezing point. The tool warns when your set temperature risks freezing damage.
Why store at the optimum rather than just very cold?+
For cold-tolerant crops, near 0 °C does give the longest life. But for chilling-sensitive crops, going too cold actively shortens life and ruins quality. The optimum is a balance — cold enough to slow decay, warm enough to avoid injury — which is why the tool centres on each crop's own optimum.
How much longer does refrigeration really add?+
A lot. Storing near the optimum can extend life many times over room temperature — apples can keep for months at 0 °C versus a couple of weeks warm. The tool shows the 'fold vs 25 °C' figure so you can see the payoff of cooling for each commodity.
Does this work for a cold room or just a fridge?+
Both — the model depends on temperature and humidity, not the size of the store. Use it to set a domestic fridge, a farm cold room or a commercial cold-chain target. Maintain steady temperature and humidity and good air circulation for results to match the estimate.
What about ethylene and mixing produce?+
Ethylene-producing fruits (apples, bananas, ripe fruit) speed ripening and ageing of ethylene-sensitive produce (leafy greens, broccoli) stored nearby. This tool estimates temperature/humidity life; for best results also separate ethylene producers from sensitive crops in the same store.