Tea Steeping Time: How Long to Steep Each Type of Tea

Short answer. Most teas land between one and five minutes: Japanese green at the short end, black and oolong at the long end. Treat any published time as a starting point, because leaf size, water temperature and the amount of leaf all change what a minute does. Fix the temperature and the dose first, then adjust time by taste in 30-second steps.

Starting times and temperatures by tea type

The Tea Association of the USA publishes ranges that are widely repeated by equipment makers. The table below reproduces them, converted to metric.

These are ranges for a Western-style cup, not rules. The UK Tea & Infusions Association gives 3 to 4 minutes for black tea and around 80°C (176°F) for green, which sits inside the same bands. Start at the short end for broken-leaf grades or if bitterness bothers you.

Why one time cannot fit every tea

The ISO tasting method is deliberately fixed

The international tasting standard (ISO 3103, which began as British Standard 6008 in 1980) specifies 2 g of tea per 100 ml of freshly boiled water, with 6 minutes for black tea, 5 minutes for leafy green and 3 minutes for fannings green. Its purpose is to let tasters compare samples under identical conditions, for example to keep a blend consistent from one harvest to the next. It is not meant as a recipe for the cup you drink, and six minutes is longer than most drinkers want.

Leaf grade and format change the clock

Small particles expose more surface to the water. A 2017 study of tea inside bags found that smaller particles and more movement of the bag sped up infusion, that loose tea infused faster and further than the same tea in a bag, and that packing more tea into a bag slowed things down. A broken-leaf bag can therefore be ready sooner than whole leaf in a roomy pot, and applying a bag timing to whole loose leaf can give a weak cup that gets blamed on the tea.

Temperature interacts with time

A 2025 study in Foods brewed commercial teas (2 g of leaf in 200 ml of water) at 80°C (176°F) and 100°C (212°F) for 2, 5 and 10 minutes and measured caffeine in the cup. Green tea averaged about 11 mg per 200 ml after 2 minutes at 80°C and about 28 mg after 10 minutes. At 100°C the 2-minute figure was higher, about 15 mg, and the 10-minute figure was about the same, 27 mg. Oolong showed the biggest relative gap at 2 minutes, about 4 mg at 80°C against about 14 mg at 100°C, and was the only tea type where the authors found a statistically significant temperature effect. So the hotter brew gets there sooner, and by 10 minutes the temperature difference has largely closed for green tea. Samples varied a lot (coefficients of variation of 30 to 60% were common), so read these as direction, not cup values.

What the extraction data say about the first two minutes

A Sri Lankan study followed a CTC black tea (5 g in 500 ml, so 1 g per 100 ml, stirred continuously, starting just off the boil and cooling to 75°C (167°F) over 20 minutes). Caffeine, gallic acid and the main catechin, EGCG, came out mostly within the first two minutes. Total polyphenols and flavonoids rose more slowly and peaked around 6 to 8 minutes. The authors concluded that 2 to 8 minutes is the useful window for that tea.

The practical reading: the first two minutes deliver most of the caffeine, while the extra minutes plausibly add body, colour and the drying sensation that people call astringency. That link to taste is an interpretation: the study measured chemistry, not flavour, in a stirred, cooling brew of one CTC tea. A separate 2026 study of three successive green tea infusions found that compounds such as gallic acid and L-theanine fell with each pour and that taste attributes shifted, which is a reminder that the second and third steeps are different drinks, not weaker copies.

Gongfu: more leaf, seconds instead of minutes

Gongfu brewing uses a gaiwan or small pot with a much higher leaf to water ratio. One UK tea merchant suggests 4 to 6 g for a gaiwan, about double a normal cup, with first infusions of 5 to 10 seconds and later ones of 10 to 20 seconds, for at least six infusions. First-steep times differ between makers and depend on the tea and the vessel, so treat these as a starting point. Timings from the two styles do not convert: ten seconds with a gaiwan packed with leaf is not a shorter version of three minutes with a spoonful in a mug. For the method in detail see the gongfu flash steeping article and the first five steeps guide.

A sensible way to find your own time

1. Weigh the leaf. Roughly 2 to 3 g per 200 ml is an editorial starting estimate for loose tea (the UKTIA suggests one rounded teaspoon per cup); the ISO tasting dose is 2 g per 100 ml and is much stronger.
2. Set the temperature for the tea type from the table, not for the kettle.
3. Set a timer for the short end of the range. The tea scale and timer guide covers cheap tools for this.
4. Taste at that mark. If it is thin but not bitter, add 30 seconds next time. If it is bitter or drying, shorten the time or lower the temperature by 5°C before reducing the leaf.
5. Write down dose, temperature and time together. One of the three alone is not a recipe.

Who this suits, and who should skip it

A timer and a table suit anyone brewing loose leaf or premium bags who wants repeatable results. If you drink strong builder's tea with milk, the 3 to 4 minutes commonly advised for black tea is fine and the temperature question disappears, since you will use boiling water. Skip fine-tuning if you use ordinary bags in a mug and enjoy the result: a census reported by the UKTIA in 2025 found most people steep for only 1 to 2 minutes, with only 7% reaching the 3 to 4 minutes the association regards as ideal. Herbal infusions are outside these tables: follow the package. If an herbal blend is for a specific health reason, check with a clinician or pharmacist.

Questions

What does "steep time" mean?

The time the leaf stays in contact with hot water before you remove it or pour off the liquor. It is linked to water temperature and leaf dose.

How do I know when tea is done steeping?

Taste is the only reliable test. Colour deepens with time but does not show balance, so sip at the short end and extend in 30-second steps if it is thin.

Does steeping longer add more caffeine?

In the studies above it does, though most of the caffeine came out early. In the Sri Lankan black tea experiment most caffeine was released in the first two minutes, and the 2025 study measured roughly 2.5 times as much caffeine in green tea at 10 minutes as at 2 minutes when brewed at 80°C. Leaf amount and tea type matter more than a minute either way. See the tea caffeine guide for actual cup figures.

Related

• Green tea temperature guide
• Black tea brewing guide
• Loose leaf versus tea bags
• Gongfu flash steeping
• Tea scale and timer

Sources

• Tea Association of the USA steeping ranges, as reproduced in the Bunn Tea Basics brochure: https://resource.bunn.com/library/eZine/tea_basics_brochure/files/basic-html/page3.html
• UK Tea & Infusions Association, "Slow down to perfect tea pace": https://www.tea.co.uk/news/article/slow-down-to-perfect-tea-pace-7-expert-tips-for-the-ultimate-brew
• ISO 3103 (summary and history): https://en.wikipedia.org/wiki/ISO_3103
• Fernando CD, Soysa P. Extraction kinetics of phytochemicals and antioxidant activity during black tea brewing. Nutrition Journal 2015;14:74. doi:10.1186/s12937-015-0060-x
• Swelling and infusion of tea in tea bags. J Food Sci Technol 2017. doi:10.1007/s13197-017-2690-9
• Determination of L-theanine and caffeine contents in tea infusions with different fermentation degrees and brewing conditions. Foods 2025. doi:10.3390/foods14132313
• Three successive infusions: scientific insights into a traditional green tea drinking custom. J Food Sci 2026. doi:10.1111/1750-3841.71082
• Rare Tea Company, how to make oolong with a gaiwan (maker's guidance): https://rareteacompany.com/pages/how-to-make-oolong-with-a-gaiwan