Coffee and calories: what's really in your daily cup
Coffee itself is nearly calorie-free. What goes in it — milk, syrup, chocolate — is usually where the kilojoules come from. Here's a typical estimate for common Australian cafe orders.
Written by the Slim Coffee Booster Australia team · Last updated 13 September 2026
Key takeaways
- Black coffee (long black, espresso) is close to zero calories on its own.
- Milk is the main calorie source in a flat white, latte or cappuccino.
- A large full-cream iced coffee with syrup can carry more kilojoules than a small meal.
- Switching to skim, or ordering a size down, is an easy way to trim kilojoules without giving up coffee.
Typical Australian cafe order calorie table
Every cafe pours differently, so treat these as typical estimates rather than guaranteed figures. Cup sizes, the ratio of milk to coffee, and the specific milk or syrup used will shift the numbers up or down. Figures are approximate kilojoules (kJ) and calories (cal) for a standard order.
| Coffee | Size | Milk | Approx. kJ | Approx. cal |
|---|---|---|---|---|
| Long black / espresso | Regular | None | ~20 kJ | ~5 cal |
| Flat white | Regular | Full cream | ~550 kJ | ~130 cal |
| Flat white | Regular | Skim | ~380 kJ | ~90 cal |
| Flat white | Large | Full cream | ~740 kJ | ~175 cal |
| Flat white | Large | Skim | ~500 kJ | ~120 cal |
| Latte | Regular | Full cream | ~630 kJ | ~150 cal |
| Latte | Regular | Skim | ~420 kJ | ~100 cal |
| Latte | Large | Full cream | ~840 kJ | ~200 cal |
| Latte | Large | Skim | ~550 kJ | ~130 cal |
| Cappuccino | Regular | Full cream | ~500 kJ | ~120 cal |
| Cappuccino | Regular | Skim | ~340 kJ | ~80 cal |
| Cappuccino | Large | Full cream | ~670 kJ | ~160 cal |
| Cappuccino | Large | Skim | ~460 kJ | ~110 cal |
| Mocha (with chocolate) | Regular | Full cream | ~950 kJ | ~225 cal |
| Mocha (with chocolate) | Large | Full cream | ~1250 kJ | ~300 cal |
| Iced coffee (flavoured, cream) | Regular | Full cream | ~1050 kJ | ~250 cal |
| Iced coffee (flavoured, cream) | Large | Full cream | ~1550 kJ | ~370 cal |
Typical estimates only — actual kilojoules and calories vary between cafes, pour sizes and brands of milk or syrup. If you need exact figures, ask your cafe or check the product's nutrition panel.
Why milk matters more than the coffee itself
Brewed coffee on its own carries almost no energy — it's water, coffee solids and a trace of oils. Once you add milk, the calorie count climbs in rough proportion to how much milk is in the cup and whether it's full cream or skim. That's why a long black and a large full-cream latte can differ by well over 150 calories, even though both are "just coffee".
Full cream versus skim
Full cream milk has roughly 50% more energy than skim for the same volume, mostly from milk fat. In a small flat white the difference is modest. In a large latte or a milk- heavy mocha, swapping to skim can save a noticeable amount over a week of daily coffees.
What actually changes the calorie count
Three things drive most of the difference between a light coffee order and a heavy one: the size of the cup, the amount and type of milk, and any syrup, chocolate or cream on top. Caffeine strength has almost no bearing on calories — an extra shot of espresso adds only a handful of calories, nowhere near as much as switching from skim to full cream or adding a pump of syrup.
Cafes also vary in how they measure a "regular" or "large" cup, and in how generous they are with milk. Two cafes serving what they both call a regular flat white can genuinely differ by 20–30 calories simply because of pour technique and cup size. That's part of why every figure on this page is described as a typical estimate rather than an exact number.
The maths that actually adds up
Two large full-cream lattes a day is roughly 350–400 calories before you've eaten anything. Over a working week that's the energy equivalent of an extra meal. None of this means coffee is "bad" — it means the extras are worth noticing if you're tracking your overall intake.
A simple check
Easy swaps that don't change the ritual
- Order one size down — same ritual, meaningfully fewer kilojoules.
- Ask for skim or an unsweetened plant milk instead of full cream.
- Skip flavoured syrups; try a dusting of cinnamon or cocoa instead.
- Make one coffee a day — often the afternoon one — a black coffee.
- Save the mocha or iced coffee for an occasional treat rather than a daily order.
Adding flavour and fibre without adding calories from sugar
A Slim Coffee Booster sachet is designed to stir into your existing cup — hot or iced — adding soluble fibre and plant extracts rather than sugar, cream or syrup. It doesn't replace your coffee order; it sits inside whichever one you already drink. Read what's in each sachet or see how black coffee habits connect to black coffee for weight loss.
Questions people also ask
Is a flat white lower in calories than a latte?
Usually, yes, because a flat white typically has slightly less milk than a latte of the same size. The difference is generally modest — often around 20–30 calories — since both are mostly milk-based.
Does a long black have any calories?
A long black or straight espresso is close to zero calories — it's essentially water and brewed coffee solids with no added milk or sugar.
How many calories are in a large iced coffee?
A large flavoured iced coffee with cream and syrup can typically sit anywhere from 250 to over 400 calories, depending on the cafe or brand — closer to a dessert than a drink. Plain iced long blacks with a splash of milk are far lower.
Is oat milk lower in calories than full cream milk?
It depends on the brand — some barista oat milks are similar in energy to full cream dairy milk, while unsweetened almond milk is usually the lowest-calorie option. Check the carton if it matters to your daily total.
Will adding a Slim Coffee Booster sachet add many calories to my coffee?
Each sachet is formulated to be low in energy compared with sugar, syrup or cream — see the ingredient and nutrition details on the ingredients page for specifics.
Keep reading
These figures are a general guide for planning purposes, not a substitute for a cafe's own nutrition information where it's published. If you're tracking kilojoules closely, the most reliable number is always the one printed on the product or provided by the specific cafe you're buying from.
Slim Coffee Booster is a food supplement. It is not intended to diagnose, treat, cure or prevent any disease, and works best alongside balanced meals and regular movement. Always read the label and follow the directions for use.