It's normal for Aiden to brew about 85% of the water you add. For example, 450 ml of water typically yields about 380–390 ml of coffee in the carafe. The difference is mostly water soaked up by the coffee grounds, which is part of every brewing method, not a sign that something is wrong.
Where the water goes
- Absorbed by the grounds. Ground coffee holds about twice its weight in water, and that water stays in the filter with the spent grounds. This accounts for most of the difference.
- Steam and residual water. A small amount escapes as steam during brewing or stays in the brewer. Aiden's brew chamber is well sealed, so this is usually only a few milliliters.
What to expect
Approximate coffee in the carafe at a 1:16 coffee-to-water ratio. Stronger ratios use more coffee, so slightly less ends up in the carafe.
| Water added | Coffee used | Coffee in carafe |
|---|---|---|
| 300 ml | ~19 g | ~255–265 ml |
| 450 ml | ~28 g | ~380–390 ml |
| 750 ml | ~47 g | ~645–655 ml |
| 1,000 ml | ~63 g | ~860–870 ml |
| 1,500 ml | ~94 g | ~1,290–1,305 ml |
Getting the amount of coffee you want
- Add about 15% more water. If you want a full 450 ml mug, brew with roughly 520 ml of water and adjust the coffee dose to match.
- Level the grounds. Give the basket a gentle shake or tap before brewing so water flows evenly through the bed.
When to contact us
Reach out if you notice any of the following:
- Your carafe consistently holds less than about 80% of the water you added.
- A water-only brew (no coffee, no filter) comes out well short of the amount you set.
We're happy to help troubleshoot. Contact Us
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