Is it worth buying a coffee brewing scale?

Do you need a coffee scale? If you brew with a lever espresso machine or use pour-over methods and want your good coffee to taste just as good tomorrow, the answer is yes. It is one of the most affordable tools that most quickly improves brewing consistency.

A scale won't suddenly make your coffee better. However, it will stop you from guessing. When you know how many grams of coffee and water you used, you can consciously change one thing and see what effect it has on your cup.

Below, we explain why a teaspoon falls short, what a scale is used for in espresso and pour-over, when you can do without one, and what to look for when choosing a barista scale.

Why grams instead of teaspoons?

A teaspoon measures volume, not mass. However, the same volume of coffee can weigh significantly different amounts depending on the roast level, bean size, and grind size. Darker roasted beans are lighter and more porous, so a spoon holds fewer of them than light roasted beans.

In a simple home test, one level tablespoon of medium roasted beans weighed around 5 g, while dark roasted beans weighed less than 4 g. After grinding, this was approximately 4 g and 3–3.3 g, respectively. This means there is a 20–25% difference before even considering the "normal" inaccuracy of scooping.

Why does this matter? Because the taste of coffee depends on the ratio of coffee to water. The Specialty Coffee Association recommends approximately 55 g of coffee per liter of water in its Golden Cup standard for pour-over brewing, with a tolerance of ±10%. When the dose varies by 20%, the brew will sometimes be too strong and bitter, and other times weak and sour. And you won't know why.

A scale solves this problem. 18 g is always 18 g, regardless of which coffee you are brewing.

What a scale is used for in espresso and pour-over

Espresso: dose, yield, and time

In espresso, a difference of one gram in the portafilter clearly changes the water flow and taste. That is why we provide recipes in grams. For our espresso blends, such as Super Tuscan or Milk & Butter, the starting point is 16–18 g of coffee and around 45 ml of beverage in 25–27 seconds for a double shot.

A scale allows you to control all three elements of this recipe:

• the dose, or how much coffee goes into the basket,

• the yield, or how much espresso flows into the cup,

• the time, if the scale has a built-in timer.

This lets you know whether sour espresso is due to too coarse a grind or simply a smaller dose than yesterday. Many baristas work with weight ratios, such as 18 g of coffee to around 36 g of beverage (1:2), but this is only a starting point for calibration.

Pour-over: ratio and pouring speed

In pour-over methods, the scale measures not only the coffee but also the water during brewing. You place the dripper or Chemex on the scale, tare it, and pour up to a specific value, for example, 40–50 g first for pre-infusion, then subsequent portions.

The same applies to the French press: on our coffee product pages, we recommend around 6 g of coffee per 100 ml of water. Without a scale, it is difficult to maintain this ratio with every brew, and yet it is precisely what determines whether the brew will be delicate or intense.

If you want to learn different brewing methods in practice, check out the Brewing Methods training at LaCava Academy.

When a coffee scale is not necessary

Not every brewing method requires weighing. A scale makes the least sense where the dose is determined by the equipment itself.

• Automatic espresso machine. The machine grinds and dispenses the coffee itself, so a scale will not change much. It is better to pay attention to the grind, strength, and temperature settings. We explain how to do this in the article How to improve the taste of coffee from an automatic espresso machine?

• Moka pot. The filter basket has a fixed capacity, and the principle is to fill it level with the rim. A scale can help, but it is not essential.

• Occasionally brewing one and the same coffee. If you drink one coffee from the same package and always brew it the same way, a fixed scoop will give a fairly consistent result. The problem arises when you change the coffee or roast level.

If you are just starting with pour-over, a regular kitchen scale with 1 g accuracy is enough at first. It will not be precise enough for espresso: with an 18 g dose, a 1 g error is over 5%.

How to choose a barista scale

A barista scale differs from a kitchen scale primarily in accuracy, response time, and built-in timer. Here is what to look for when choosing.

Features such as Bluetooth and an app for saving brewing profiles are nice additions for people who like to analyze their recipes. However, they are not necessary for consistent brewing.

A final tip: if you mainly brew pour-over, choose a scale with a larger plate. If you mainly brew espresso, opt for a compact model that will fit under the portafilter.

Coffee scales in the LaCava range

In our coffee scale category, you will find models from Acaia and Timemore. The data in the table comes from the product pages; check the availability of individual models directly in the store.

A scale is one piece of the puzzle. The most benefit will come to someone who already has a good coffee grinder and pour-over kettle, because only then are all brewing parameters truly under control. And to start calibration, it is worth choosing coffee with a predictable profile, such as Daily Bru for pour-over or Super Tuscan for espresso.

Sources

1. CoffeeGeek, “One to Fourteen” – discussion of the SCA Gold Cup standard (55 g of coffee per liter of water ±10%). coffeegeek.com

2. Trade Coffee, “How to brew coffee without a scale” – measurements of the mass of a spoonful of coffee for different roast levels. drinktrade.com

3. LaCava: product pages Super Tuscan and Milk & Butter (espresso and French press recipes) and scales Acaia Lunar 2021, Acaia Pearl and Timemore Black Mirror Basic, as of October 2026.