Why weigh coffee instead of using scoops?

Because scoops aren't consistent. AeroPress says a level scoop of its own holds 12–13 g of coffee and a heaped one 16–18 g, a difference of about a third. Weight is the same however finely the coffee is ground and however you fill the scoop.

What accuracy does a coffee scale need?

Ideally 0.1 g. Hario's V60 Drip Scale, for example, reads to 0.1 g, which is precise enough for an 18 g espresso dose or a 15 g pour-over dose and shows a shot's weight climbing as it runs.

Can I use a kitchen scale for coffee?

Yes, for filter coffee, as long as it reads in 1 g steps and you can tare it. A coffee scale adds 0.1 g precision, a timer, a fast response while you pour, and a size that fits under a dripper or on an espresso drip tray.

What's a smart coffee scale?

One that does more than weigh. Hario's Polaris calculates the water for your chosen ratio and shows the percentage poured; Acaia's Pearl shows your real-time pouring speed with a flow-rate indicator.

Coffee Scale Guide: Why Weigh Coffee, and What to Buy

A coffee scale is a small digital scale that weighs your coffee and water, usually to a tenth of a gram, with a timer built in. It’s the least glamorous piece of kit and the one that makes the biggest difference to consistency: once you weigh, you can repeat a good cup and fix a bad one. This page covers why weighing works and what to look for.

The short version

Scoops vary; weight doesn’t.
Look for 0.1 g, a built-in timer and about 2 kg capacity.
Weigh the water too, as you pour, by taring with the brewer on the scale.
A kitchen scale will do for filter coffee if it reads in 1 g steps.
Smart scales add ratio calculators and flow-rate guides.

Why weigh coffee instead of using a scoop?

Because a scoop measures volume, and coffee’s volume changes with the roast, the grind and how you fill the scoop. AeroPress says its own scoop holds 12–13 g level but 16–18 g heaped, a difference of about a third from the same scoop. Weight removes that guesswork.

It’s also how the professionals work. The SCA’s cupping standard, for example, sets its dose by weight: 8.25 g of coffee per 150 ml of water, Royal Coffee’s summary says. Every recipe on this site gives grams, and the brew ratio calculator scales them for you.

What should you look for in a coffee scale?

Feature	Why it matters
0.1 g resolution	Small doses such as 11–18 g need precision
Built-in timer	Brew time is half of every recipe
Fast, stable reading	You’re pouring while it weighs
About 2 kg capacity	Room for a brewer, a server and a litre of water
Tare button	Zero it with the brewer and coffee on top
Size	It has to fit under your dripper, or on an espresso drip tray
Power	Batteries or USB charging

How do popular coffee scales compare?

Scale	Resolution	Capacity	Timer	Extras	Power
Hario V60 Drip Scale	0.1 g	Not stated on Hario UK’s page	Yes	Auto power-off after 5 minutes	Not stated
Hario Polaris	Not stated on Hario UK’s page	2,000 g	Counts up to 9:59	Calculates the water for your ratio; shows the percentage poured	3 × AA
Acaia Pearl	Not stated on Acaia’s page	Not stated	Yes, with an auto-start mode	Flow-rate indicator; dual display and beverage modes	Lithium battery, USB-C; 30–40 hours a charge

Sources: Hario UK and Acaia product pages. Where a maker’s page doesn’t give a figure, we’ve said so rather than guess; check the manual before you buy.

How do you use a scale to brew?

Put the brewer and filter on the scale and press tare.
Add the coffee to your dose, then tare again.
Start the timer as you pour, and stop pouring when the scale reads your water weight.

For espresso, weigh the dose in the portafilter and the shot in the cup: 18 g in and 36 g out is the espresso guide’s starting point.

Scales and other kit guides

Brew ratio calculator: coffee and water for any ratio.
Burr grinder: grind what you’ve weighed.
Gooseneck kettle: pour to the gram.

Coffee Scale

Do you need a scale to make coffee?