Tea Brewing Calculator

About the Tea Brewing Calculator

Brewing excellent tea is all about matching the right temperature, steeping time, and leaf-to-water ratio to your specific tea type. Unlike coffee, where near-boiling water works for most methods, tea demands precision: green tea scalded with boiling water turns bitter and astringent, while black tea brewed too cool tastes flat and underextracted. The difference between a perfect cup and a mediocre one is often just 10°F or 30 seconds.

Each tea family has evolved a set of ideal brewing parameters. Delicate green teas like Japanese gyokuro need cool water (140-160°F) and short steeps (1-2 minutes). Robust black teas like Assam thrive at a full boil (200-212°F) for 3-5 minutes. Oolong sits in between and rewards multiple short infusions (gongfu style), where the same leaves are brewed 5-10 times, each revealing different flavors.

It gives optimized brewing parameters for every major tea variety, handles both Western-style (large pot, single infusion) and gongfu-style (small vessel, multiple infusions) brewing, and adjusts leaf quantity for your vessel size. It also tracks caffeine content and multiple infusion flavor profiles.

When This Page Helps

Tea changes quickly with a few degrees of heat or a few extra seconds of steeping. Use this calculator to get the right time, temperature, and leaf amount for the tea style you are brewing.

How to Use the Inputs

1. Select your tea type from the dropdown (green, black, oolong, etc.).
2. Choose the specific variety if you know it.
3. Select Western or gongfu brewing style.
4. Enter your vessel size (cup, teapot, gaiwan).
5. View the recommended temperature, steep time, and leaf amount.
6. Track multiple infusions with the infusion table.

Example Calculation

Tips & Best Practices

• Don't use a thermometer? Boil water and let it cool: 1 min = ~195°F, 3 min = ~175°F, 5 min = ~160°F.
• Pre-warm your teapot or cup with hot water before brewing — cold vessels cool water too quickly.
• If tea is too strong, reduce steep time by 15-30 seconds rather than using less leaf.
• Store tea away from light, moisture, and strong odors. Sealed, opaque containers are best.
• Loose leaf tea is almost always better quality and more economical per cup than tea bags.
• After gongfu brewing, empty leaves fully between infusions — water left sitting over-extracts.

Tea Types and Their Characters

**Green:** Unoxidized, vegetal/grassy/sweet. Japan: sencha, gyokuro, genmaicha. China: Dragonwell (Long Jing), bi luo chun. **White:** Minimally processed, delicate/floral/sweet. Silver Needle, White Peony. **Oolong:** Partially oxidized (15-85%), complex/fruity/toasty. Light: Tieguanyin, Ali Shan. Dark: Da Hong Pao, Shui Xian. **Black:** Fully oxidized, bold/malty/rich. Assam, Ceylon, Darjeeling, Keemun, Lapsang Souchong. **Pu-erh:** Aged/fermented, earthy/smooth. Sheng (raw) and Shou (ripe). **Herbal:** Not technically tea (no Camellia sinensis), caffeine-free. Chamomile, peppermint, rooibos.

Why Temperature Matters So Much

Camellia sinensis leaves contain catechins (bitter), amino acids (sweet/umami), and volatile aromatics (floral/fruity). **Below 160°F:** Amino acids dissolve well, catechins barely extract: sweet, light. **160-180°F:** Moderate catechin extraction balanced with amino acids: the green tea sweet spot. **180-200°F:** Higher catechin extraction, more body and tannin: oolong territory. **200-212°F:** Maximum extraction of everything, including heavy tannins: black tea needs this to develop full flavor. Brewing black tea cool produces weak results; brewing green tea hot produces bitter results.

Multiple Infusions: The Flavor Journey

Quality tea evolves across infusions. A typical oolong journey: **1st steep:** Light, floral, "opening up." **2nd-3rd:** Peak flavor, full body, complexity. **4th-5th:** Sweeter, smoother, less intense. **6th+:** Lighter, subtle, pleasant fade. High-quality pu-erh can maintain flavor across 15+ infusions in gongfu style.

Frequently Asked Questions

• What temperature for green tea?

  Green tea should be brewed at 160-180°F (70-82°C). Delicate Japanese greens (gyokuro, sencha) prefer the lower end (160-170°F). Chinese greens (Dragonwell, gunpowder) can handle 175-185°F.

• How much loose leaf tea per cup?

  For Western brewing: 2-3 grams (about 1 teaspoon) per 8 oz cup. For gongfu: 5-8 grams per 100-150 mL gaiwan. Fluffy teas (white peony) need more volume; dense rolled teas (gunpowder) need less.

• Can I re-steep the same tea leaves?

  Yes! Most quality loose leaf teas can be steeped 2-5 times (Western style) or 5-15 times (gongfu). Each infusion reveals different flavors. Herbal teas and tea bags are usually single-infusion only.

• Why does my green tea taste bitter?

  Water too hot (above 180°F) or steeped too long (over 2 minutes) is the most common cause. Green tea catechins release bitterness rapidly above 175°F. Cool the water and shorten the steep.

• What is gongfu brewing?

  Gongfu (kung fu) is a Chinese brewing style using a small vessel (gaiwan or Yixing pot), a high leaf-to-water ratio, and many short infusions (15-60 seconds each). It produces more concentrated, complex cups and is ideal for oolong and pu-erh.

• Does steeping longer add more caffeine?

  Yes — caffeine extraction increases with time and temperature. An 8-minute steep extracts roughly 80% of available caffeine, vs 60% in 3 minutes. But it also extracts more tannins, which can make the tea bitter.