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Thai Tea Brew Calculator: Exact Amounts for Any Batch

Brewing for one, four or a party of twenty? Set the sliders and this calculator scales our street-tested cha yen recipe for you — tea mix, water, sugar and both milks, in grams and spoons.

How the calculator works

Every number starts from our authentic Thai iced tea recipe, which we tested side by side against Bangkok street stalls: per tall glass, about 2 tablespoons (12 g) of Thai tea mix, 240 ml of hot water, 1 tablespoon of sugar, 1½ tablespoons of sweetened condensed milk and 1 tablespoon of evaporated milk floated on top.

• Glass size scales everything in proportion to a 400 ml tall glass.
• Strength changes only the amount of tea mix. Stronger tea comes from more mix, not a longer steep — past 5 minutes the tea turns bitter.
• Sweetness scales the sugar and condensed milk the way Bangkok shops do with their 0–100% sugar levels. The evaporated milk float stays the same so the drink keeps its creamy top.

Tips for big batches

For more than about eight glasses, brew a concentrate: steep the mix and sugar in the water, strain, stir in the condensed milk while it is hot, then chill. Strained concentrate keeps for several days in the fridge without getting harsher. Pour over ice and float the evaporated milk per glass when you serve.

Use a large filter sock or a fine sieve lined with cloth — fine Thai tea mix clogs paper filters. If the result tastes thin, see why Thai tea comes out weak.

ChaTraMue Original Thai Tea Mix

The blend the calculator is built around — the same mix most Bangkok stalls use.

Check price on Amazon →

Keep reading

• Authentic Thai iced tea (cha yen): the full method
• How to order Thai tea in Bangkok (sweetness levels explained)
• The best Thai tea brands, brewed side by side

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