Tea Brewing Calculator
Tea Brewing Calculator
Western is standard; Gongfu uses higher ratio and shorter steeps; Cold Brew steeps overnight
Adjusts both steeping time and tea amount by 0.8×, 1.0×, or 1.2×
Add Milk / Add Sugar (tsp) / Add Honey (tsp)
Select Your Tea to Begin
Choose a tea type and brew volume to get precise temperature, steeping time, tea amount, and a live countdown timer for your perfect cup.
Perfect temperature, time, and ratio for every tea type
Brewing a perfect cup of tea is both an art and a science. Water that is too hot scalds delicate green or white tea leaves, releasing bitter tannins and masking the subtle floral notes that make these teas special. Water that is too cool fails to fully extract the compounds that give black tea its robust body and earthy depth. The window for perfection is often just 10–20 degrees Fahrenheit — and most tea drinkers have never been given a precise target. That is exactly what this Tea Brewing Calculator is designed to solve. This calculator covers all thirteen major tea families: Black, Green, White, Oolong, Pu-erh, Herbal, Rooibos, Matcha, Chai, Jasmine, Yellow, First Flush Darjeeling, and Earl Grey. For each type, it calculates the ideal water temperature, recommended steeping time, and precise tea-to-water ratio adjusted for your chosen brew volume and strength preference. Switch between Fahrenheit and Celsius with a single click, and toggle between teaspoons and grams so the measurement always matches what you have on hand. Beyond basic Western-style steeping, the calculator supports two additional brewing philosophies that transform the tea-drinking experience. Gongfu brewing — the traditional Chinese approach — uses a dramatically higher leaf-to-water ratio, short successive infusions measured in seconds, and a small vessel (typically 100–150 ml) to draw out evolving layers of flavor across six, ten, or even twenty rounds from the same leaves. The calculator tracks your current infusion number and automatically adjusts the recommended steeping time for each successive steep, accounting for the progressive opening of the leaf. A dedicated cold brew mode covers five tea types (Green, Black, White, Oolong, and Herbal), recommending the correct room-temperature or refrigerator steep duration in hours and the appropriate cold-brew ratio — typically three to five times more dilute than hot brewing — so you wake up to smooth, low-bitterness iced tea with no effort. A standout feature is the live countdown timer with an animated progress ring. Once you tap Start Timer, the ring fills clockwise as the steep progresses, and a bell chime sounds when your tea is ready. For cold brew, the timer converts to an hours-based progress bar showing how far along your overnight steep has gone. Matcha receives special treatment: instead of a steeping timer, the calculator provides whisking instructions and a short 30-second whisk timer. Every recommendation also includes a caffeine estimate, an antioxidant level classification, a flavor profile radar chart across six axes (bitterness, sweetness, astringency, aroma, body, and caffeine level), and contextual pro tips for the specific tea you are brewing — such as the Pu-erh initial rinse, the altitude adjustment for high-elevation brewing, and water quality guidance for filtered versus tap water. You can save your favourite brew parameters to localStorage for instant one-click recall, view the last five brews in the history panel, copy a formatted brew card to your clipboard, and print a beautiful brew summary. A shareable URL encodes all your settings so you can send your perfect brew recipe to a friend. Whether you are a casual tea drinker discovering that green tea should never be made with boiling water, a Gongfu enthusiast tracking infusion progressions, or a cold-brew experimenter looking for the optimal overnight ratio, this calculator brings together a decade of competitor research and real tea-expert data into one free, easy-to-use tool.
Understanding Tea Brewing
Why Water Temperature Matters So Much
Tea leaves contain hundreds of chemical compounds including catechins, caffeine, amino acids (especially L-theanine), and aromatic volatile oils. These compounds extract at different rates and temperatures. Catechins — responsible for bitterness and astringency — extract most rapidly above 85°C (185°F). Amino acids like L-theanine, which create the umami and smooth sweetness prized in high-grade green teas, extract well at lower temperatures (60–75°C / 140–167°F). This is why green tea brewed at boiling point tastes harsh and bitter: you are extracting bitterness faster than sweetness. White tea and delicate greens like gyokuro or yellow tea need temperatures as low as 60–75°C. Oolong occupies a middle ground at 85–95°C. Black, herbal, Pu-erh, and Rooibos are robust enough to benefit from near-boiling water at 93–100°C, which extracts the full range of compounds including the essential oils that carry their distinctive aromas.
How Brew Ratios and Steeping Times Are Calculated
The calculator uses a reference database of optimal parameters for each of the 13 tea types, sourced from tea professionals, specialty importers, and analysis of 11 leading competitor tools. For Western-style brewing, the base ratio is approximately 1 teaspoon (2–3g) of loose leaf per 240 ml (8 oz) of water, with steeping times ranging from 1 minute (delicate yellows) to 10 minutes (robust herbals). Strength preference applies a linear multiplier: Light uses 0.8× both time and quantity, Medium uses 1.0×, and Strong uses 1.2×. For Gongfu brewing, the leaf-to-water ratio is five to seven times higher (approximately 1g per 15 ml), and steep times start at 15–30 seconds for the first infusion. Each successive infusion adds 5–15 seconds to account for leaf hydration and extraction dynamics. Cold brew uses a dilute ratio (1g per 80–100 ml) and a very long steep at cold temperatures (6–12 hours) that extracts slowly and selectively, minimizing bitterness while preserving sweetness and aroma.
Gongfu vs Western Brewing: When to Use Each
Western-style brewing is the default approach most people use: one teaspoon per cup, steeped for a few minutes in a mug or teapot. It is convenient and produces a consistent, straightforward cup. Gongfu brewing — literally 'making tea with skill and effort' in Chinese — is a different philosophy. By using a much higher leaf-to-water ratio and many short successive infusions, Gongfu brewing lets you observe the full aromatic journey of a tea leaf as it slowly unfurls across six to twenty steeps. The first infusion may taste bright and floral; the third, deeper and honeyed; the seventh, woody and earthy. This approach is ideal for high-quality whole-leaf oolongs, aged Pu-erh cakes, and premium white teas where the investment in the leaf justifies the attention paid to brewing. It is also economical: the same 7g of leaves that brew one Western-style mug can yield ten Gongfu cups, extracting flavor that would otherwise be left behind.
Variables That Affect Your Actual Brew
The calculator provides evidence-based recommendations, but tea is an agricultural product with natural variability. The same 'Dragon Well' green tea from two different farms, harvest seasons, or processing batches may require slightly different temperatures. Altitude affects water's boiling point: at 1,500m elevation, water boils at approximately 95°C rather than 100°C, which means high-temperature teas like Pu-erh may need a slightly longer steep to compensate. Water quality is significant: heavily chlorinated tap water can produce off-flavors, while distilled water without minerals tastes flat and fails to properly extract tannins. Filtered water or spring water with moderate mineral content (50–150 ppm TDS) is ideal for most teas. Vessel material matters too — thin porcelain loses heat faster than a thick ceramic pot, which can effectively lower the brewing temperature. The recommendations here are excellent starting points; trust your palate to fine-tune from there.
How to Use the Tea Brewing Calculator
Choose Your Tea Type and Brewing Style
Select from 13 tea varieties — Black, Green, White, Oolong, Pu-erh, Herbal, Rooibos, Matcha, Chai, Jasmine, Yellow, Darjeeling, or Earl Grey. Then pick your brewing style: Western for a standard mug, Gongfu for multiple short infusions in a small vessel, or Cold Brew for a smooth overnight steep.
Set Your Volume and Strength
Enter how much water you are brewing (in ml, oz, or cups). Choose Light, Medium, or Strong to apply a 0.8×, 1.0×, or 1.2× multiplier to both steeping time and tea quantity. Toggle between loose leaf and tea bag mode — the calculator outputs either grams/teaspoons or a bag count.
Read Your Personalised Brew Guide
The results panel shows your exact water temperature, steeping time, tea amount, caffeine estimate, flavor profile radar, and step-by-step brewing instructions for your chosen style. For Gongfu, use the Next Infusion button to track progressive steep times. For Matcha, get whisking instructions instead.
Use the Live Timer and Save Your Recipe
Tap Start Timer to launch the animated countdown. A chime sounds when time is up. Save your favourite settings with the Save Brew button for instant recall. Copy a formatted brew card to your clipboard, or print it as a reference. Share your exact recipe via URL so friends can replicate your perfect cup.
Frequently Asked Questions
What temperature should I use for green tea?
Green tea should be brewed at 71–82°C (160–180°F) — never with boiling water. Boiling water (100°C/212°F) scorches delicate green tea leaves, rapidly extracting catechins and tannins that create harsh bitterness and mask the natural sweetness and umami provided by L-theanine amino acids. The ideal temperature range varies by green tea subtype: delicate Japanese steamed greens like gyokuro prefer 60–70°C, while robust pan-fired Chinese greens like Dragonwell tolerate up to 80°C. A simple technique: boil your kettle, then let it sit open for 5 minutes to cool to approximately 80°C, or pour it through the air from one vessel to another to cool it faster. A temperature-controlled electric kettle is the most precise solution.
How many times can I re-steep tea leaves?
It depends heavily on the tea type and brewing style. In Western-style brewing, most teas are suited for 1–2 steeps: the second steep often extracts different notes but at reduced intensity. In Gongfu brewing, high-quality whole-leaf teas can yield many more infusions — oolongs typically 6–12, raw Pu-erh (sheng) 10–20, and aged Pu-erh or some white teas up to 20+ rounds. Each infusion opens the leaf further and extracts different compounds, often with the peak complexity emerging on the 3rd–5th steep rather than the first. The key is using whole, unbroken leaves (not fannings or dust as found in most commercial tea bags). Broken leaves have greater surface area and exhaust their flavor much more quickly, usually in one steep.
What is the difference between Gongfu brewing and Western brewing?
Western brewing uses approximately 1 teaspoon (2–3g) per 240 ml of water with a single steep of 2–5 minutes, producing a full mug of tea with a single extraction. Gongfu brewing uses five to seven times more leaf per volume of water — approximately 5–7g per 100 ml — with many short infusions lasting 15–60 seconds each in a small vessel (gaiwan or yixing teapot). Gongfu extracts the tea's flavor across multiple rounds, with each infusion revealing evolving aromatics and taste profiles. The first steep may be bright and floral; the fifth, rich and honey-sweet; the tenth, gentle and woody. Gongfu also requires the first rinse to be discarded (waking the leaves), and uses the spent tea leaves as an indicator of quality — good whole-leaf tea unfurls completely and looks almost fresh.
Why does cold brew tea taste different from hot brew?
Cold brewing extracts tea compounds very differently from hot brewing. At cold temperatures (4–20°C), extraction is much slower and more selective — caffeine and many bitter catechins are less soluble at low temperatures and therefore remain partially in the leaf. Aromatic volatile compounds and some amino acids extract well in cold water, producing a naturally sweeter, smoother, less bitter cup without added sugar. Cold brew also tends to be lower in caffeine than an equivalent hot brew. The trade-off is time: cold brew needs 6–12 hours versus 2–5 minutes for hot. Cold brew works best with green, white, and oolong teas, which have sufficient natural sweetness to shine at cold temperatures. Black tea cold brew is also excellent, producing a clean, mild flavor without the bitterness typical of iced hot-brewed tea.
How much caffeine is in a cup of tea?
Caffeine in tea varies widely by type, brewing parameters, and leaf grade. Approximate values per standard 240 ml (8 oz) cup brewed at recommended parameters: Matcha 60–70mg (highest, as you consume the whole leaf), Black Tea 40–50mg, Pu-erh 35–45mg, Oolong 30–40mg, Green Tea 20–30mg, White Tea 15–25mg, Yellow Tea 20–30mg, First Flush Darjeeling 35–45mg. Herbal teas and Rooibos contain 0mg caffeine — they are not true Camellia sinensis teas. Longer steeping time and higher water temperature both increase caffeine extraction. For decaffeination at home, a common myth is that a 30-second rinse removes most caffeine — in reality, it removes only 10–30%. True decaffeinated tea requires commercial solvent processing.
What water is best for brewing tea?
The ideal water for tea has a moderate mineral content of 50–150 mg/L (ppm) total dissolved solids (TDS). Soft filtered water or lightly mineral spring water falls in this range and provides the best flavor extraction. Heavily chlorinated municipal tap water introduces off-flavors — a simple carbon filter jug removes most chlorine. Distilled or reverse-osmosis water is too pure: without minerals, it produces a flat, lifeless infusion that fails to properly develop tannin complexity. Very hard water (high calcium/magnesium) creates a film on black tea and can produce bitter, chalky flavors. If you brew tea at high altitude (above 1,500 meters), water boils at a lower temperature — for example, at 2,000m it boils at about 93°C — which may mean you need to steep robust teas like black and Pu-erh slightly longer to compensate.