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Bean Freshness Calculator

Enter your roast date and find out when your beans are at their best.

Days Since Roast

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Degassing

Freshness by Brew Method

EspressoPeak: day 5-18
Today
DegassingPeakFadingStale
Filter / Pour OverPeak: day 4-25
Today
DegassingPeakFadingStale
Cold BrewPeak: day 5-30
Today
DegassingPeakFadingStale

Storage Tip: Sealed Bag (with valve)

Keep beans in the original bag with a one-way valve. Squeeze out excess air before resealing. This is the baseline for freshness.

About Bean Freshness

Coffee beans are not at their best the moment they come out of the roaster. After roasting, beans release carbon dioxide in a process called degassing. During the first few days, this excess gas can cause uneven extraction and sharp flavors, especially in espresso. Most beans hit their peak flavor window somewhere between 5 and 21 days after roasting, depending on roast level and brew method.

After the peak window closes, beans begin to lose volatile aromatic compounds. The coffee becomes flatter and less complex over time. Storage plays a major role in how quickly this decline happens. A sealed bag with a one-way degassing valve is the gold standard for maintaining freshness, while an open bag accelerates oxidation significantly.

Different brew methods have different tolerance for bean age. Espresso is the most sensitive because it relies on precise extraction under pressure. Filter methods like pour over are more forgiving and can produce good results with slightly older beans. Cold brew, with its long immersion time and cold water, extracts differently and works well with beans up to 5 weeks old.

Frequently Asked Questions

How long do coffee beans stay fresh after roasting?
Most coffee beans are at their best between 5 and 35 days after roasting, depending on roast level and brewing method. Light roasts tend to have a longer window than dark roasts. After the peak window, beans gradually lose aroma and flavor complexity. Stored properly in a sealed bag with a one-way valve, beans remain drinkable for up to 6 weeks. After that, they are considered stale.
Why do I need to wait before brewing espresso with fresh beans?
Freshly roasted beans release large amounts of carbon dioxide, a process called degassing. If you brew espresso with beans that are too fresh (within 1-5 days of roasting), the excess CO2 causes uneven extraction, excessive crema, and sour or sharp flavors. Letting beans rest for at least 5-7 days allows enough gas to escape for a balanced, sweet espresso shot.
Can I freeze coffee beans to keep them fresh?
Yes, freezing is an effective way to preserve coffee freshness for months. The key is to freeze beans in airtight, portion-sized bags with all air removed. When you are ready to brew, thaw the entire portion at room temperature before opening the bag. This prevents condensation from forming on the beans. Do not refreeze thawed beans, and avoid opening the bag while the beans are still cold.
How do I know if my coffee beans are stale?
Stale beans show several signs. They lack the rich, complex aroma of fresh beans and may smell flat or papery. When ground, stale beans produce little to no bloom (the bubbling that occurs when hot water hits fresh grounds). The brewed coffee tastes dull, thin, or cardboard-like, lacking sweetness and acidity. If your beans are oily on the surface and smell rancid, they have gone well past stale.
Does the roast level affect freshness?
Yes. Darker roasts degas faster because the roasting process creates more porous cell structures, allowing CO2 to escape more quickly. This means dark roasts reach their peak sooner (around 4-5 days) but also go stale faster (around 4 weeks). Light roasts retain CO2 longer, take more time to degas (5-7 days), but stay fresh longer (up to 6 weeks). Medium roasts fall in between.
What is degassing and why does it matter?
Degassing is the release of carbon dioxide gas that builds up inside coffee beans during roasting. The Maillard reaction and caramelization of sugars produce CO2, which gets trapped in the bean cell structure. Over the first few days after roasting, this gas gradually escapes. Degassing matters because excess CO2 interferes with water contact during brewing, causing channeling in espresso and uneven extraction in filter methods. A properly rested bean allows water to extract flavors evenly.