How to Brew Filter Coffee at Home

Filter coffee doesn't need to be complicated. You don't need a $300 kettle or a degree in extraction theory. What you need is decent coffee, the right grind, and a bit of attention to a few basic things that actually make a difference.

If you've been getting results that are flat, bitter, or just kind of forgettable, the fix is probably simpler than you think. Here's how to brew filter coffee at home in a way that's actually worth drinking.

What counts as filter coffee?

Filter coffee is any method where hot water passes through ground coffee and a filter — paper or metal — before landing in your cup. That includes pour overs (like a V60 or Chemex), drip machines, and batch brewers.

What they have in common: they tend to produce a clean, lighter-bodied cup that shows off the character of the coffee itself. If the coffee is good, filter brewing lets you taste it. If it's not, there's nowhere to hide.

This guide works for all of those methods. The principles are the same.

Start with the right grind

Grind is the single biggest lever you have. Too fine and the water can't move through properly — you get over-extracted, bitter coffee. Too coarse and the water rushes through without picking up much flavour — you get something thin and sour.

For filter coffee, you want a medium grind. Think coarse sand, not talcum powder. If you're buying pre-ground from Six8, select the medium grind option at checkout — it's labelled for plunger and filter, and it's dialled in for this style of brewing.

If you have a grinder at home, experiment. Make one cup, taste it, and adjust. That's the whole process.

Get your ratio right

The standard starting point for filter coffee is 60g of coffee per litre of water. That works out to roughly 1 heaped tablespoon per 200ml cup — but a kitchen scale gives you much more consistent results than eyeballing it.

Once you've made a few cups at that ratio, you can adjust based on taste:

• Too strong? Use slightly less coffee or more water.
• Too weak or flat? Add a little more coffee.

Don't try to fix weak coffee by using hotter water or brewing longer — you'll just get bitter. Fix the ratio first.

Water temperature matters more than most people think

Boiling water is too hot for filter coffee. It pushes extraction too fast and pulls out harsh, bitter compounds before the good stuff has a chance to come through.

The sweet spot is around 90–96°C. If you don't have a thermometer, bring your kettle to the boil, then let it sit for 30–45 seconds before you pour. That's usually enough to bring it into range.

The quality of your water matters too. If your tap water tastes a bit off, your coffee will too. Filtered water makes a noticeable difference.

Which coffee works best for filter?

Filter brewing suits lighter, more expressive coffees well — though that doesn't mean you're locked into anything complicated. The right coffee is the one you actually enjoy drinking.

A good place to start is the Ethiopian Single Origin. It's naturally processed and has flavour notes of blueberry, dark chocolate, and brown sugar — those characteristics come through clearly in a filter brew in a way they sometimes don't in espresso. It's the kind of cup that surprises people who expect single origin to mean difficult.

If you'd rather something more familiar and easygoing, the Bohemian Blend also works well as a filter. Milk chocolate and a hint of raspberry — it's consistent, it's easy to dial in, and it's the one people tend to come back to. Order it in the medium grind and it's ready to go.

Not sure where to start? The Core Range Pack includes four 250g bags across the Six8 range — it's a practical way to taste your way through the coffees and figure out what you like before committing to a regular order.

A few small things that make a real difference

Rinse your paper filter before brewing. Run hot water through it before adding your grounds. This removes any papery taste and pre-heats your brewer so the water temperature stays stable.

Use fresh coffee. Six8 roasts in small batches weekly, so what you receive is fresh stock — not something that's been sitting in a warehouse. Coffee is still excellent at 4–5 weeks from roast, but for filter brewing specifically, fresher tends to be brighter. If you drink filter regularly, a fortnightly subscription means you're rarely reaching for a bag that's gone stale.

Keep your gear clean. Coffee oils build up and go rancid. A quick rinse after each use and a proper clean every week or two keeps things tasting the way they should.

Bloom your grounds. For pour over methods, start by pouring just enough water to wet the grounds — about twice the weight of the coffee — and let it sit for 30 seconds. This lets trapped gas escape and gives you a more even extraction. You'll often see the grounds bubble and rise slightly. That's normal and good.

You don't need to overcomplicate it

Most people who aren't happy with their filter coffee are off on one of two things: grind size or ratio. Fix those two and everything else becomes fine-tuning.

Start with a medium grind, 60g per litre, water just off the boil, and a coffee you actually want to drink. Taste it. Adjust one thing at a time. That's genuinely the whole method.

If you want somewhere easy to start, the Core Range Pack ($69) gives you four different coffees to brew through — a good way to learn what you like without committing to a full kilo of anything. Every kilogram sold also puts $1 toward partner organisations working to rescue children from exploitation, so your coffee order does a bit more than usual.