# How Many Kilojoules in Protein Coffee (Proffee)? | OzCal

> A homemade proffee (iced coffee with milk and a scoop of protein powder) is roughly 700 to 1,200 kJ for about 25 to 35 g of protein, depending on the milk and the scoop. A plain milk flat white already carries about 7 g of protein for 300 kJ (skim) to 482 kJ (full cream). The scoop adds most of the extra energy, about 400 to 500 kJ.

Source: https://ozcal.com.au/kilojoules/protein-coffee · Published by OzCal, an Australian nutrition tracking app · Last updated 2026-11-05
Data: FSANZ Australian Food Composition Database (CC BY-SA 3.0 AU), held in OzCal's catalogue; protein-powder figures are typical product-panel values.
Energy conversion: 1 dietary calorie = 4.184 kilojoules.

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# How many kilojoules are in protein coffee (proffee)?

A **homemade proffee**, an iced coffee made with milk and a scoop of protein powder, is roughly **700 to 1,200 kJ** for about **25 to 35 g of protein**, depending on the milk and the scoop. A plain milk flat white already carries about **7 g of protein** for 300 kJ (skim) to 482 kJ (full cream). The scoop adds most of the extra energy, about **400 to 500 kJ**. A black coffee has none of either.

Key numbers
- homemade proffee 700 to 1,200 kJ, 25 to 35 g protein
- plain flat white 7 g protein, 300 to 482 kJ
- scoop of protein powder about 400 to 500 kJ, 20 to 25 g protein
- black coffee under 20 kJ, 0 g protein

## The coffee base, by milk

The protein in any milk coffee comes from the milk, not the coffee. Regular 240 mL cups.

| Coffee base (240 mL) | Energy | Protein |
|---|---|---|
| Long black (no milk) | <20 kJ | 0 g |
| Almond milk flat white | 218 kJ | <1 g |
| Skim milk flat white | 300 kJ | ~7 g |
| Reduced fat flat white | 370 kJ | ~7 g |
| Oat milk flat white | 454 kJ | ~2 g |
| Full cream flat white | 482 kJ | ~7 g |
| Soy milk flat white | 499 kJ | ~6 g |

## Build a proffee: base plus a scoop

A typical scoop of whey protein is about 30 g of powder, giving roughly 20 to 25 g of protein and about 400 to 500 kJ. Product panels vary, so check yours.

| Build | Energy | Protein |
|---|---|---|
| Skim flat white + 1 scoop | ~750 kJ | ~31 g |
| Full cream flat white + 1 scoop | ~930 kJ | ~31 g |
| Almond flat white + 1 scoop | ~670 kJ | ~24 g |
| Iced coffee (250 mL skim milk) + 1 scoop | ~760 kJ | ~33 g |
| Iced coffee (250 mL full cream) + 1 scoop | ~1,150 kJ | ~33 g |

A cup of milk already brings about 8.5 g of protein on its own (roughly 700 kJ full cream, about 300 kJ skim), so most of the protein in a milk-based proffee comes from the milk and the scoop together, not the scoop alone.

## The thing most people get wrong

Almond milk looks like the smart low-kilojoule base, but it adds under 1 g of protein, so a proffee built on it relies entirely on the scoop. Skim milk is usually the better base: about 7 g of protein for roughly 300 kJ, the best protein-to-energy ratio of the common milks. For a ready-to-drink protein coffee, the only numbers that matter are protein per serve and kilojoules per serve on the panel: at least 15 g of protein under about 800 kJ is pulling its weight, under 10 g and over 1,000 kJ is closer to a milkshake.

### Stop guessing the number

OzCal logs this in about five seconds: snap it, scan the barcode or say it. Kilojoules and protein the way the label shows them, on 94,000+ verified Australian foods. https://apps.apple.com/au/app/id6808936952

## Common questions

**Q: How many kilojoules are in a proffee?**

A homemade proffee (iced coffee with milk and a scoop of protein powder) is roughly 700 to 1,200 kJ for about 25 to 35 g of protein, depending on the milk and the scoop.

**Q: Does protein coffee have a lot of kilojoules?**

The coffee is cheap (a milk flat white is 300 to 482 kJ); the scoop adds most of the extra, about 400 to 500 kJ. Ready-to-drink protein lattes vary widely, so check the panel.

**Q: How much protein is in a flat white without adding anything?**

About 7 g in a regular 240 mL flat white, from the milk. A large 360 mL cup has about 11 g. Almond milk drops it under 1 g; black coffee has none.

**Q: What is the best milk for a low-kilojoule proffee?**

Skim milk: about 7 g of protein for roughly 300 kJ. Almond is lowest in kilojoules but adds almost no protein, so you rely entirely on the scoop.

## Keep reading
Kilojoules in a flat white (every milk): https://ozcal.com.au/kilojoules/flat-white
Cheapest high-protein foods: https://ozcal.com.au/kilojoules/cheapest-high-protein-foods-australia
Is proffee actually worth it: https://ozcal.com.au/blog/proffee-protein-coffee-australia
How many kilojoules per day: https://ozcal.com.au/how-many-kilojoules-per-day

**Where these numbers come from:** Coffee and milk values are the FSANZ Australian Food Composition Database entries held in OzCal's catalogue. Protein-powder figures are typical values from published product panels and vary by brand, so always check the panel on your tub. Energy converted at 1 Cal = 4.184 kJ. Last updated 2026-11-05.

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Citation: OzCal (2026). "How Many Kilojoules in Protein Coffee (Proffee)? | OzCal". https://ozcal.com.au/kilojoules/protein-coffee