Acaia Lunar Espresso Coffee Scales (Black)

The Acaia Lunar 2021 is a professional-grade espresso scale built for baristas and home enthusiasts who refuse to compromise on accuracy. Water-resistant anodised aluminium, a 20-millisecond response time, and Acaia's industry-leading weighing technology - all in a 105 × 105 mm footprint compact enough to sit on virtually any espresso machine drip tray.

The Lunar 2021 delivers real-time feedback with readability down to 0.01g, so whether you're dialling in a single shot at home or running a high-volume café workflow, every extraction is consistent and repeatable. The updated weighing technology stabilises in under one second - fast enough that it never slows down your routine.

Monitor your espresso extraction as it happens. The built-in LED bar visualises flow rate in real time - from 0.1 g/s on the left to 3.4 g/s on the right - helping you spot channelling, fine-tune your grind, and achieve more consistent shots. A single bright LED marks the peak flow rate after each brew for quick reference.

Choose from six built-in modes including auto-tare, auto-start timer on flow detection, and pre-infusion auto-timer. The Tare Save function stores the weight of your preferred dosing cup or container, so you can build a fast, repeatable workflow without re-taring every time. When brewing is complete and you remove the cup, the display flashes your final beverage weight and average flow rate - a quick summary of every shot.

30–40 hours of battery life from a lithium-ion rechargeable battery, with USB-C PD charging support. For home use making one or two coffees a day, most people charge it once every few weeks. A long-press of the power button shows the current battery level at a glance.

The 8-digit LED display has adjustable brightness for easy reading in any indoor lighting condition, with enhanced brightness for outdoor visibility. The optional stable weight indicator (toggled in settings) appears beside the power button when the reading has settled - useful for precise dosing.

Sizing & Information

• USB Type-C Charging Cable
• 100g Calibration Weight
• Heat-Resistant Pad
• Quick Start Guide
• Readability: 0.1g standard / 0.01g high-resolution mode - for ultra-precise espresso dosing
• Response time: 20 milliseconds
• Bluetooth 4.0 - app integration and firmware updates via the free Acaia app (iOS and Android)
• Water-resistant anodised aluminium construction
• Compact 105 × 105 × 15 mm footprint - fits on virtually any drip tray
• Maximum capacity: 2000g / 70.55 oz
• Weight: 265g ± 5 g
• Model: AL008

• Readability: 0.1 g / 0.01 g (high-resolution mode)

Acaia Useful For

The Lunar is the go-to espresso scale for home baristas and café professionals who want competition-level precision without slowing down their workflow. Its compact footprint fits on drip trays from a wide range of espresso machines.

If you're stepping up from a basic kitchen scale or replacing an older coffee scale, the Lunar 2021 sets a new benchmark for what's possible.

Frequently Asked Questions

Is the Acaia Lunar worth it? For anyone serious about espresso, yes. The Lunar's 0.01g precision, 20ms response time, and real-time flow rate indicator give you a level of control over your extraction that simply isn't possible with a standard kitchen scale. It's an investment that pays back in consistently better shots and fewer wasted pucks. It's also the scale used by the majority of specialty cafés and competition baristas worldwide.

What is the difference between the Acaia Lunar and the Acaia Pearl? The Lunar (105 × 105 mm) is designed specifically for espresso — compact enough to sit on an espresso machine drip tray, with a flow rate indicator and six espresso-focused modes. The Pearl is larger and better suited to filter brewing and pour-over methods. If your primary method is espresso, the Lunar is the clear choice.

What is the difference between the Acaia Lunar and the Acaia Pyxis? The Pyxis (66 × 66 mm) is even smaller than the Lunar, with 0.01g precision as standard. However, it only has three weighing modes compared to the Lunar's six, and its smaller size makes it more sensitive to pump vibration on some espresso machines. The Lunar offers a better balance of compact size, vibration stability, and espresso-specific features for most home and café setups. The Pyxis is a better choice if extreme portability or fitting on unusually narrow drip trays is your priority.

Does the Acaia Lunar fit on my espresso machine? In most cases, yes. The Lunar's 105 × 105 mm footprint and 15 mm height are designed to fit on standard drip trays with a cup underneath the portafilter. It's compatible with Sage espresso machines, as well as the vast majority of other home and commercial espresso equipment.

How do I connect the Acaia Lunar to my phone? Download the free Acaia app (available for iOS and Android), then hold the timer button to activate Bluetooth pairing mode on the scale. The app unlocks additional espresso modes, lets you log shot data over time, and delivers firmware updates to keep your scale performing at its best.

How do I charge the Acaia Lunar, and how long does the battery last? The Lunar 2021 charges via USB-C — the cable is included in the box. A full charge provides 30–40 hours of battery life, so for home use you'll typically only need to charge it every few weeks. Note: the scale has built-in charging protection and won't charge when the surface is hot from brewing — this is normal. It will charge once it cools.

Is the Acaia Lunar water resistant? Yes. The Lunar is built with water-resistant anodised aluminium, designed to handle the splashes and steam typical in an espresso environment. It is splash-resistant but not fully waterproof — avoid submerging it or leaving it in standing water. Clean with a soft cloth and warm water only; avoid detergents or chemicals as these can damage the anodised coating.

What espresso modes does the Acaia Lunar have? The Lunar 2021 has six modes: weighing, dual display (manual timer), auto-timer (starts on flow detection), auto-tare, auto-tare with pre-infusion auto-timer, and pour-over. Each mode can be customised via the settings menu or through the Acaia app. You can also disable modes you don't use, so you only cycle through the ones relevant to your workflow.