3 Reasons Why You Need a Coffee Scale

Every coffee connoisseur needs a coffee scale. When you go to a shop that takes pride in its expertly crafted coffee, take notice. They always use a scale.
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✍ Written by: Garrett Oden
📅 Published: November 4, 2013
🗃 Filed under: EQUIPMENT

As a newcomer to brewing amazing coffee at home, I was extremely skeptical when a friend told me I needed to invest in a gram scale.

Coffee and water – that’s all you need right?

Yes, but using those two ingredients to the best of their ability requires a couple tools, a simple kitchen scale being one of them.

coffee scale

At the coffee shop I manage, we weigh everything. From the coffee coming out of the grinder to the espresso coming out of the machine, everything is weighed.

When I first arrived, I thought it was overkill, but did not take me long at all to realize how the step of weighting ingredients could impact the final brew in a dramatic way.

Still skeptical? You won’t be for long.


There are some ratios that are considered excellent for brewing coffee. Anything between 1:15 and 1:19 (coffee:water) is considered in the green. Most of the guides on Coffee Brew Guides use the 1:17 ratio.

Without having a scale to weigh out the perfect amounts, you’re missing out on a well-balanced cup.

Too much water and too little coffee will result in over-extraction. Your coffee will be bitter, you won’t drink it, and then you’ll fall asleep at work. Bad.

The same can happen with under-extracted coffee with too little water and too much coffee.

The wonderful artisan coffee you buy at a shop is created with care and precision. If you want to brew that great cup yourself, buy a simple scale.


If you’re a fan of the tablespoon, you are a victim of inconsistent coffee.

One day it’s sour, the next it’s fine, and the third day it’s bitter.

What keeps changing?

The coffee to water ratio. You’re either putting in too much or too little coffee (depending on the day), which is resulting in a final cup that is never the same. Being able to have precise measurements will ensure that the ratio of coffee to water is never unbalanced again.

Before I had a scale I would use a tablespoon or just eye-ball it. Even when I used the same brew method and technique, every cup would be different.

A $20 gram scale eliminated that problem overnight.


Coffee can be expensive, especially when you purchase beans that have been roasted with extreme care. If you’re just tossing scoops of beans into the grinder, I promise you’re going to go through the bag all lot quicker than if you were using a scale.

Travis, a reader without a scale, told me he generally throws in “a couple” scoops of beans for each cup, while I typically use 20g.

We each started with a 12oz bag of whole beans. He got 20 cups of coffee from the bag. I got 28.

See the difference?

Guessing isn’t going to get you killed, but being able to be precise goes a long way when it comes to the taste of the coffee, the consistency of the cup, and the hole in your wallet.

Which Scale to Use?

I bought a simple The Biggest Loser scale for $15 that has worked, but is showing signs of wear while it’s still fairly new. I wish I had done a bit of research and dished out a few extra bucks for one of the scales that the specialty coffee community strongly recommends.

The Jennings CJ4000 is by far the most recommended scale across the board for coffee enthusiasts. It can measure in 0.5g increments while every other in its price category can only measure in 1g increments, has a back light, and comes with a 20-year warranty.

If that’s not the scale for you, there are a couple others that are frequently recommended. The Escali Primo Digital and the Hario Scale would all serve you well.

Happy brewing!

Garrett Oden

Garrett Oden

Coffee Industry Writer

Welcome, fellow coffee lover!

The entire purpose of this coffee blog is to empower you to explore the wonderful world of coffee. There’s much to learn and experience, so get to reading!

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  1. Greg R.

    Can you help me with measurements? I have a drip coffee maker that makes up to 12 “cups” on the carafe. I’m assuming this means 12 fluid cups. How much coffee should I use per fluid cup if I’m using a scale like the one you linked? I’m probably going to pick up a scale to start measuring. Right now, my burr grinder has a dial which changes how many seconds it grinds. The full 30 seconds seems to work well for a full pot. When I make an 8 cup pot, I dial it back to a 20 second grind.

    • Garrett Oden

      If I were you, I would check the specific model to see if the manufacturer claims a cup is 5oz, 6oz or 8oz, just in case. 6oz is more common, and is probably what “cups” refers to. That massive carafe holds a whopping 72 ouces. The SCAA specifies a ratio of 3.75 ounces of coffee per half-gallon (64 ounces) of water. After some math, I recommend using 4.2oz (~115 grams) of coffee beans. So if you’re making 8 cups, use 2.8oz (~80 grams) of coffee.

      If you discover the drip machine you have claims “cups” to be another number of ounces, just remember 3.75oz of coffee to 64oz of water.

      Is this helpful?

      • Greg R.

        Absolutely, more than helpful! I don’t have a scale yet, but it’s on my wish list. Once I do have one I will take your post and see how the measurements match up to the timer on the grinder I’ve been using. I’m wondering if 30 seconds ends up being ~115 grams, and 20 seconds ~80 grams. The scale will measure in grams, is that right?

        • Garrett Oden

          Yes sir grams and ounces! Good luck experimenting once you get a scale. Let me know if what you discover after you’re finished – I’m interested as well.