The Basic Method: Pouring Hot Water Through Ground Coffee

Making coffee in a filter is straightforward: you place ground coffee in the filter, pour hot water over it, and let gravity pull the water through the grounds and into your cup or pot below. The water extracts flavor from the coffee as it passes through, and the filter catches the grounds so you get a clean cup. This method works whether you are using a drip machine, a pour-over cone, or a straightforward flat-bottomed filter holder.

The key variables are the amount of coffee, the water temperature, and how long the water sits in contact with the grounds. Get these three things roughly right, and you will have drinkable coffee every time. The exact timing and ratios matter less than people think — coffee is forgiving within a reasonable range.

Key Takeaways

  • Use a ratio of about one tablespoon of ground coffee per six ounces of water, though you can adjust this to taste.
  • Water should be between 195 and 205 degrees Fahrenheit — hot enough to extract flavor but not so hot it burns the grounds.
  • Let the water drip through slowly; the entire process should take three to five minutes from start to finish.
  • Wet the filter first with a small amount of hot water to remove paper taste and warm the cup or pot underneath.
  • Use coffee ground to medium fineness — finer than sand but coarser than flour — so water passes through at the right speed.

Getting the Coffee-to-Water Ratio Right

Start with one tablespoon of ground coffee per six ounces of water. A standard coffee mug holds about eight ounces, so for one mug use roughly one and one-third tablespoons. For a small pot that holds four cups (32 ounces), use about five tablespoons.

This ratio produces a medium-strength cup. If you like your coffee stronger, add more grounds — not more water. If you like it weaker, use fewer grounds. The ratio stays the same; you are just changing how much coffee you make. Measuring by tablespoon is close enough; you do not need a scale unless you are making coffee for many people and want consistency.

Water Temperature and How to Achieve It

Water between 195 and 205 degrees Fahrenheit extracts the right amount of flavor without scorching the grounds. Boiling water (212 degrees) is too hot and will make the coffee taste bitter. Water that is too cool will not extract enough flavor and the coffee will taste weak and sour.

If you have a thermometer, use it. If you do not, let boiling water cool for about 30 seconds after it comes off the heat — that is close enough to the right temperature. You can also use the straightforward test: pour the water and count to three; if you can hold your hand over the stream without it being painful, the temperature is in the right range.

The Grind Size and Why It Matters

Medium grind is the standard for filter coffee. The grounds should look like coarse sand — bigger than flour, smaller than peppercorns. This size lets water flow through at the right speed: fast enough that the coffee does not over-extract and taste bitter, slow enough that the water has time to pull out flavor.

If your grounds are too fine (like powder), the water will move slowly and the coffee will taste over-extracted and harsh. If they are too coarse (like pebbles), the water will rush through and the coffee will taste weak and sour. Most grocery store pre-ground coffee is already medium grind, so you can use it straight from the bag.

Step-by-Step: Making Coffee in a Filter

  1. Place the filter in your holder, cone, or machine. If it is paper, wet it with a small amount of hot water first — this removes the paper taste and warms the cup or pot below. Discard this water.
  2. Add your ground coffee to the wet filter. For one cup, use about one and one-third tablespoons. Tap the filter gently so the grounds settle into an even layer.
  3. Heat water to just off boiling (195 to 205 degrees). If you do not have a thermometer, let boiling water cool for 30 seconds.
  4. Pour a small amount of water — just enough to wet all the grounds — and wait 30 seconds. This is called the bloom and lets the grounds release trapped gases.
  5. Pour the rest of the water slowly in a circular motion, keeping the water level just below the top of the filter. The entire pour should take two to three minutes.
  6. Let the last of the water drip through. The total time from first pour to last drop should be three to five minutes. If it is much faster, your grind is too coarse; if much slower, it is too fine.
  7. Remove the filter and grounds. Pour your coffee and drink it while it is hot.

Common Mistakes and How to Avoid Them

The most common mistake is using water that is too hot, which makes the coffee taste burnt and bitter. The second is using grounds that are too fine, which slows the drip and over-extracts the flavor. Both are straightforward to fix: let your water cool slightly and buy a coarser grind or ask the coffee shop to grind it coarser.

Another mistake is pouring all the water at once instead of slowly. This makes the water rush through without extracting enough flavor, and you end up with weak, sour coffee. Pour in stages over two to three minutes and you will get better results. Finally, do not reuse a filter or let grounds sit in the filter after brewing — they will make the next cup taste stale.

Frequently Asked Questions

Can I use boiling water straight from the kettle?

Boiling water is slightly too hot and will make your coffee taste bitter. Let it cool for 30 seconds after it comes off the heat, or use a thermometer to check that it is between 195 and 205 degrees. This small step makes a noticeable difference in taste.

What if my coffee tastes weak and sour?

Your water is probably too cool or your grounds are too coarse. Use hotter water (closer to boiling) and let it drip more slowly, or ask for a finer grind next time you buy coffee. You can also use more grounds — add an extra half-tablespoon and see if that helps.

How long can I let the water sit in the filter?

The water should drip through in three to five minutes. If it takes longer, your grind is too fine and the coffee will taste over-extracted and harsh. If it is faster than three minutes, your grind is too coarse and the coffee will taste weak. Adjust your grind size for the next batch.

Do I need to use a paper filter or can I use cloth?

Both work. Paper filters are disposable and catch more of the fine oils, making a cleaner cup. Cloth filters are reusable and let a little more flavor through, making a slightly richer cup. Rinse cloth filters well after use and let them dry completely to prevent mold.

Can I make coffee in a filter without a holder or cone?

Yes. Place the filter over a mug and hold it in place with a rubber band or clothespin, or rest it on the rim of a cup. Pour slowly so the water does not overflow the sides. This is slower and messier than using a holder, but it works in a pinch.