How Much Caffeine Is in Kopi and Teh? | A Singapore Coffee Shop Guide

There is no single caffeine number for a cup of kopi or teh. The amount depends on how strong the brew is, how much of it goes into the cup and how large the serving is. If a stall does not have recipe-specific nutrition information, the name of the order gives you too little information to calculate the milligrams.

If you want less caffeine, choose a smaller amount of the same brew, ask whether a weaker brew or decaf is available, or choose a drink confirmed to contain no caffeine. A kopi o kosong or teh o kosong can still contain caffeine. The order changes sugar or milk, while the coffee or tea remains.

• Use milligrams per whole cup or bottle when you have a reliable figure.
• Ask whether a smaller serving contains less brewed coffee or tea.
• Count caffeine from other drinks and products too.
• Check age-specific advice before ordering for a child or teenager.

At a coffee shop, an order tells the stall how to prepare your drink. Sugar, milk and serving style can affect taste without telling you the dose of caffeine. The useful question is how much brewed coffee or tea went into the serving. Even two cups of the same size can differ if the brew strength or the amount poured varies. FDA consumer guidance on caffeine and variation across drinks

What you order	What it can tell you	What to check for caffeine
Kopi o kosong	Black coffee without added sugar in a typical order	How much coffee is served and whether it is decaffeinated
Teh o kosong	Tea without milk or added sugar in a typical order	The tea base and brew strength
Kopi or teh siu dai	A request for less sweetness	Whether the amount of brewed coffee or tea changes
Iced kopi or teh	A cold preparation served with ice	How much actual brew goes into the cup
Decaf coffee	A drink made with decaffeinated coffee if available	It can still contain some caffeine
An herbal infusion	A different base from coffee or tea if confirmed	Check ingredients, especially blended products

Coffee shop shorthand can vary by stall. When reducing caffeine matters, describe what you want plainly. “Can I have a smaller serving of the brew?” gives the stall more to work with than a request for less sugar.

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Some packaged drinks state their caffeine amount. If a bottle gives milligrams per 100 mL, multiply by the number of 100 mL units you will drink. If the label gives milligrams per serving, check how many servings the bottle contains. If the shop has no figure for its preparation, treat the amount as unknown. Figures for supermarket drinks cannot tell you what is in a different stall’s cup.

A worked example using an invented label

A 300 mL bottle listing 20 mg per 100 mL contains 60 mg if you finish the whole bottle. If you drink 150 mL, that would be 30 mg. If a second bottle lists 45 mg per bottle, compare 45 mg against the portion of the first bottle you actually drink. The figures are invented. Use the number and serving size on your own label.

A Nutri-Grade mark answers a different question

Singapore’s Nutri-Grade system assesses sugar and saturated fat for covered beverages. A grade cannot tell you how much caffeine is in the drink. You need a caffeine figure or reliable ingredient information for that decision. HealthHub’s Nutri-Grade guide

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The Ministry of Health cites local paediatric advice that children under 12 should avoid caffeine and adolescents aged 12 to 18 should have no more than 100 mg a day. That amount refers to total caffeine. A drink with an unknown amount is difficult to count against it. At a stall, water or another option confirmed to be caffeine-free avoids guessing. Singapore Ministry of Health’s response on caffeine and young people

For most adults, the US FDA cites 400 mg a day as an amount generally unassociated with negative effects. Sensitivity varies and some people need individual guidance. Treat the figure as context rather than a target. If you are pregnant or have been advised to limit caffeine, follow the guidance from your healthcare team. FDA consumer guidance on caffeine

A day can include coffee at breakfast, tea after lunch and another caffeinated drink later. If you are tracking intake, write down which products you drank and which amounts you can verify. Leave an unknown figure marked as unknown instead of treating it as zero.

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If you like the taste of kopi, try a smaller serving of the same brew if that is what the stall actually serves. If the stall can add water while reducing the amount of brew, that is a different order from adding water to a full serving. The former uses less brewed coffee, while the latter dilutes the same amount.

If the main issue is sleep, look at when you have coffee or tea. HealthHub’s sleep guidance advises avoiding caffeine at night. Try moving the later cup earlier or replacing it with an option you know is caffeine-free. Notice whether the change helps before adjusting the rest of the day. HealthHub’s MindSG sleep guidance

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Is teh always lower in caffeine than kopi?

The drinks vary by strength and serving. A comparison needs details for the actual recipes and amounts.

Is decaf caffeine-free?

Decaffeinated coffee can still contain some caffeine. If you need to avoid it, check the product information or choose a confirmed caffeine-free option.

Does less ice change caffeine?

It depends on how the stall fills the cup. If the amount of brew stays the same, replacing or removing ice does not remove caffeine from that brew.

Can I tell from bitterness?

Taste is an unreliable way to judge milligrams. Roast, brew strength, milk, sugar and other factors affect how the drink tastes.

How to read bubble tea sugar levels and Nutri-Grade

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