Work out tea brewing strength instantly with clear inputs, formula shown and shareable results.
Leaf weight is grams per litre times the water volume, and extraction follows a first-order curve, 1 - e raised to minus steep time over about 2.5 minutes. Extraction flattens out after four or five minutes, so pushing the steep longer mostly adds tannin bitterness rather than strength; more leaf is the better lever.
Leaf quantity
grams = water litres x grams per litre
Extraction
extracted share = 1 - e ^ (-steep minutes / 2.5)
grams = water litres x grams per litre. Leaf weight is grams per litre times the water volume, and extraction follows a first-order curve, 1 - e raised to minus steep time over about 2.5 minutes.
Extraction flattens out after four or five minutes, so pushing the steep longer mostly adds tannin bitterness rather than strength; more leaf is the better lever.
Enter water, tea per litre, steeping time. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.