How to Brew Tea: Temperature, Time and Ratio by Type

Tea is one of the most forgiving drinks in the world — and one of the easiest to ruin. The same leaf that yields a sweet, layered cup at 75°C for two minutes can turn harsh and bitter at a rolling boil for five. The good news is that brewing well is not mystical. Four variables decide almost everything: the water you start with, how hot it is, how much leaf you use, and how long leaf and water stay together. Get those roughly right for the type of tea in your pot — the families we map in The Main Types of Tea — and you are most of the way to an excellent cup.

One caveat before the numbers: everything below is a starting point, not a law. Tea makers have argued about brewing since Lu Yu wrote the first tea manual twelve centuries ago (a story we tell in The Global History of Tea). Your leaf, your water and your palate get the final vote.

Start with the water

A cup of tea is about 99% water, so the water matters more than any gadget. Three rules cover most situations. First, use fresh, cold water each time — freshly drawn water tastes livelier, and repeatedly reboiling the kettle does your tea no favours. Second, avoid extremes: very hard water can dull flavour and leave a film on black tea, while heavily chlorinated water carries its taint straight into the cup; a simple carbon filter fixes both in most homes. Third, do not use softened or distilled water if you can help it — tea brewed in completely mineral-free water tastes strangely flat. Moderately soft, fresh, neutral-tasting water is the ideal.

A word on equipment

You need remarkably little. A kettle, a pot or mug, something to keep leaf and liquor apart, and ideally a small digital scale and a timer — both of which most people already carry in their phone, minus the scale. If you buy one thing, make it a roomy basket infuser or a proper teapot with a wide strainer: whole tea leaves can swell to several times their dry size as they unfurl, and flavour comes from that unfurling. The novelty tea ball the size of a walnut, stuffed tight, is the enemy of good tea. Beyond that, materials matter less than habit — porcelain, glass and glazed ceramic are all neutral and easy to keep clean. Warm the pot with a splash of hot water before brewing and your water temperature will hold steadier, which matters more than any accessory.

Temperature: the variable that changes everything

Different tea compounds dissolve at different rates and temperatures. Hotter water extracts more of everything, faster — including the catechins and caffeine that read as bitterness and astringency. Delicate, unoxidised leaves are easily scalded; fully oxidised and fermented leaves shrug off the boil. Hence the general rule: the less oxidised the tea, the cooler the water.

As a working guide: green tea likes about 70–80°C, white tea about 75–85°C, oolong about 85–95°C, black tea about 90–100°C, and dark teas such as pu-erh a full 95–100°C. No thermometer? Boil the kettle and let it stand — roughly two to three minutes of resting takes boiling water down into green-tea territory in a typical kettle, and pouring water between vessels sheds several degrees each transfer. Variable-temperature kettles make this effortless, but they are a convenience, not a requirement.

Ratio and time: the reference table

For western-style brewing, a sound starting ratio is about 2 g of leaf per 200–250 ml of water — roughly a teaspoon for wiry leaves, more like a heaped teaspoon for fluffy, voluminous ones, which is why a cheap 0.1 g scale is the single best upgrade a tea drinker can buy. Steep times below are for that ratio; taste at the early end and extend to preference.

Timing deserves respect because extraction is not linear: the aromatic top notes come out early, the tannic heft later. An extra unplanned minute rarely makes tea stronger in the pleasant sense — it mostly makes it more bitter. Use a timer, not instinct, at least until instinct has been trained.

If you prefer your tea stronger, resist the urge to simply steep longer. Adding more leaf and keeping the time the same raises intensity while keeping bitterness in check; stretching the time raises bitterness faster than it raises anything you actually want. This one adjustment — strength by leaf, not by time — solves more disappointing cups than any other single change. It is also, incidentally, how professional tasters work: the international standard for tea tasting (ISO 3103) fixes the ratio and the time precisely so that the leaf, not the brewing, is what varies.

Western and gongfu: two philosophies of brewing

What we have described so far is western-style brewing: a relatively small amount of leaf, a large volume of water, one or two long steeps. It is convenient, familiar and well suited to breakfast blends and everyday cups.

Gongfu brewing, the Chinese approach whose name means something like "skilful effort", inverts the formula: much more leaf — commonly in the region of 5–7 g per 100 ml — in a small vessel such as a gaiwan (lidded bowl) or little clay pot, steeped many times for very short periods, starting at mere seconds and lengthening gradually. Instead of one averaged cup, you drink the tea as a sequence: each infusion catches the leaf at a different stage, and a fine oolong or pu-erh can evolve across eight or more steeps. Gongfu brewing takes more attention and more leaf, but for whole-leaf oolongs, dark teas and good greens it reveals detail that a single long steep blurs together. Neither method is "correct" — they are different instruments for the same music.

Re-steeping: your leaves are not finished

Perhaps the most useful habit western drinkers can borrow from Asia is simply this: do not throw the leaves away after one steep. Most whole-leaf teas give two or three good western-style infusions, and gongfu-brewed oolongs and pu-erhs many more. Add roughly 30–60 seconds to each successive western steep; in gongfu brewing, later steeps lengthen from seconds towards minutes. Re-steeping is not making do — many drinkers find the second infusion of an oolong the best of all — and it makes good leaf considerably better value. (Dust-grade tea bags are the exception: their tiny particles surrender nearly everything in the first steep.)

Common mistakes, quickly fixed

Most disappointing cups trace back to a handful of errors. Boiling water on green tea is the classic: it scalds the leaf into bitterness, and is the main reason people believe they dislike green tea — try 75°C and be converted (our green tea profile has more). Too little leaf, steeped too long is the sneakiest: it produces a cup that is somehow both weak and bitter; use more leaf and less time instead. Guessing the time while doing something else adds stray minutes of tannin. Cramming a big leaf into a tiny infuser ball stops it unfurling — give leaves room in a basket infuser or brew them loose and strain. Stewing tea on the heat or leaving leaves sitting in the pot keeps extracting long past the pleasant point; decant fully or lift the leaves out. And neglecting the water, as above, undermines everything else.

Milk and sweetener are matters of taste, not correctness, but timing them helps. If you take milk in black tea, brew the tea to full strength first and add the milk afterwards — milk added to a weak brew cannot be fixed, while a strong brew can always be softened. Greens, whites and oolongs are almost universally drunk neat, since milk flattens exactly the delicacy those teas are prized for. Honey and sugar dissolve best while the cup is hot; taste before you sweeten, because a well-brewed leaf often needs less than habit suggests.

One honourable exception proves several rules at once: Indian masala chai is deliberately simmered — leaf, milk, sugar and spices together — precisely because strong CTC black tea can stand up to milk and boiling where delicate leaf cannot. Method follows the leaf; see our masala chai recipe for the technique done properly, or our classic black tea recipe for the gentler western pot.

A one-paragraph summary

Fresh, decent water; cooler for greener teas, hotter for darker ones; about 2 g of leaf per cup; a timed steep of one to four minutes depending on type; and leaves saved for another round. That is the whole craft in miniature. Start from the table, adjust one variable at a time, and trust your own palate over anyone's chart — including ours. To train that palate further, our Academy primer on understanding flavour is a natural next step.

Where to go next

Not sure which teas to practise on? Meet the families in The Main Types of Tea, wondering about strength and caffeine, see Does Tea Contain Caffeine? — or take the long view with The Global History of Tea. For something cold, our iced green tea recipe applies the same principles at lower temperatures.