TeaWisp Editorial · October 26, 2026
To adapt a loose leaf tea recipe, multiply the original leaf weight by your new water volume divided by the original water volume. Keep the original temperature and time for the first attempt, then adjust one variable at a time. Use the directions for the particular tea as your starting recipe.
Measure the water, not the name of the cup
A “cup” may mean a household mug, a serving or a measuring unit. Those are not interchangeable. Use the amount of water you intend to pour, leaving appropriate space below the rim and within the brewer’s fill limit. For a brewer with a separate inner chamber, check that chamber’s usable volume rather than relying on the outer jug size.
The formula
New leaf weight = original leaf weight × new water volume ÷ original water volume. Keep both water amounts in the same unit. Weigh the leaves in grams if your scale allows; a spoonful varies with leaf shape and how it is filled.
Suppose a recipe specifies 3 g for 250 mL. This is an arithmetic example, not a universal recommendation for TeaWisp products.
| Water | Calculation | Leaves |
|---|---|---|
| 200 mL | 3 × 200 ÷ 250 | 2.4 g |
| 350 mL | 3 × 350 ÷ 250 | 4.2 g |
| 500 mL | 3 × 500 ÷ 250 | 6 g |
Doubling water does not mean doubling time
The formula preserves the starting proportion of dry leaves to water. It does not prove that a larger vessel extracts identically. Keep the original time and temperature for a first comparison, drain fully, and note the result. If you change the vessel, its heat retention and pouring time may also change the cup.
Do not combine a high-leaf, short-steep gongfu recipe with a long mug steep simply because both use the same tea. Treat each complete preparation method as its own starting point.
Make a useful note
Record the tea’s full name, dry leaf weight, water amount, temperature, time and vessel. Add a short personal observation, such as “too strong for me.” If you try less leaf next time, keep the other settings stable so the comparison is easier to interpret.
Common questions
What if my scale only measures whole grams?
Note that limitation rather than pretending the result is exact. Use a practical amount your scale can measure and record it; do not exceed your vessel’s safe capacity to make the arithmetic convenient.
Does this predict the amount I will drink?
No. Leaves retain some water and liquid may remain in the brewer. The input water volume is not a guaranteed serving yield.
Where should I start for green or jasmine tea?
Use the pack directions first. Our separate brewing guides explain the full preparation; this page helps resize that chosen recipe rather than replacing it. Browse the current tea selection if you need a clearly identified tea to begin.
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General brewing background: UK Tea & Infusions Association. The workflow and calculations here are TeaWisp editorial guidance, not a product test. UKTIA