Tea brewing calculator
Scale leaf and water for a selected tea, vessel, method, and starting strength.
Ranges, not remote lab results
Caffeine comparison
Compare the labels or ranges you enter. Use it for planning—not to diagnose sensitivity or calculate the exact caffeine in an untested cup.
What changes caffeine?
Plant material, harvest, particle size, dose, water temperature, steep time, repeated infusions, serving volume, coffee bean and roast, brewing method, and formulation. Decaffeinated does not always mean zero.
Keep planning
Related tea calculators
Move from one decision to the next without returning to the homepage.
Useful equipment
Product recommendations for more repeatable results
These tools help measure water, leaf, time, or temperature. They do not make a calculator’s estimate more medically precise.
Best starter tea scale
Tea scales
KitchenTour Coffee Scale with Timer
A 0.1 g readout and built-in timer make leaf ratios and infusion timing easier to reproduce.
Best single-cup basket
Mug infusers
OXO Brew Tea Infuser Basket
Fine perforations, a spacious basket, and a lid that becomes a drip tray make it a strong daily mug brewer.
Best controlled-pour value
Electric kettles
COSORI Electric Gooseneck Kettle
Five presets, stainless-steel water contact surfaces, controlled pouring, and a 60-minute hold make it useful across tea styles.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases.