The Hario POLARIS Coffee Scale is a smart brewing scale designed for pour-over and drip coffee, combining real-time weight measurement with built-in extraction ratio calculation and a brewing percentage display. The POLARIS Scale has a capacity of 2,000 g and a minimum measurement of 0.1 g, and is available in White.
The POLARIS Scale's extraction ratio function takes the guesswork out of recipe building. Enter the weight of your ground coffee and select a ratio (tighter ratios from 1:1 to 1:14 for a stronger, more concentrated cup; wider ratios from 1:15 to 1:30 for a lighter, more delicate brew), and the scale calculates the total water target automatically. For a brewer working through a new coffee or dialing in an unfamiliar grind, this means fewer wasted grams and faster iteration toward a repeatable result.
During the brew, the POLARIS Scale tracks how much water has been added and displays the brewing percentage on screen, showing exactly where you are relative to the total pour target at any moment. This live feedback is especially useful for multi-stage pours such as bloom-and-pulse techniques, where hitting each interval accurately shapes extraction. A dedicated Time Mode with a standby indicator adds a built-in timer so weight and time can be tracked together without a separate device.
The POLARIS Scale measures 127 mm wide by 165 mm deep by 27 mm tall, a footprint sized to sit under a V60 or similar dripper without crowding the counter. The body is ABS and acrylic resin, and silicone rubber feet keep it from shifting during pouring. At approximately 437 g including its individual box, the scale is light enough to pack for travel or move between brew stations.
| Specification | Detail |
|---|---|
| Capacity | 2,000 g |
| Minimum weight | 0.1 g |
| Dimensions (W x D x H) | 127 mm x 165 mm x 27 mm |
| Weight (with individual box) | Approx. 437 g |
| Body material | ABS resin, Acrylic resin |
| Non-slip parts | Silicone rubber feet |
| Colour | White |
| Country of manufacture | China |
The Hario POLARIS Scale suits home brewers and coffee enthusiasts who brew by weight and want ratio guidance and real-time pour feedback built into the scale itself, without relying on a separate app or manual calculation. Its 2,000 g capacity covers single-cup through multi-cup pour-over sessions.
The POLARIS Scale is not suited to espresso brewing, where sub-0.1 g resolution and a low-profile form factor are typically required. It is also not a kitchen or food scale for general-purpose weighing beyond coffee preparation.
On the Hario POLARIS Scale, you place your ground coffee on the platform and use the plus and minus buttons to select an extraction ratio. The scale multiplies the coffee weight by that ratio and displays the resulting water target in grams. During the pour, the screen shows the current water added divided by the total target, expressed as a percentage, so you can track progress without doing any arithmetic.
The Hario POLARIS Scale supports extraction ratios from 1:1 through 1:30. Ratios in the 1:1 to 1:14 range produce a stronger, more concentrated brew; ratios from 1:15 to 1:30 produce a lighter brew that highlights clarity and delicate flavors. The ratio is set manually using the plus and minus buttons before or during brewing.
Yes. The Hario POLARIS Scale includes a Time Mode that can be activated by pressing the Time Mode button; the button lights up when the timer is on standby. This allows brewers to track both weight and elapsed time on the same device during a pour.
The Hario POLARIS Scale has a maximum capacity of 2,000 g and measures from a minimum of 0.1 g. This range covers most pour-over and drip brewing scenarios, from a single small cup through a full carafe.
The body of the Hario POLARIS Scale is constructed from ABS resin and acrylic resin. The base includes silicone rubber feet to prevent the scale from sliding on smooth or wet surfaces during pouring.
At CoffeeRoast Co., we are passionate about coffee. Every piece from our catalog is designed and rigorously tested to make sure you get perfect and consistent roasts every time.
We’ve partnered with various manufacturers that operate around the globe under a strict set of guidelines both on a local and corporate level so that when you shop with us, you will be able to select from the highest quality coffee roasters and coffee equipment available on the market.
Whether you are a coffee enthusiast or a small business owner, you're sure to find whatever so you have the perfect roast you've been looking for.
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In most cases, once the order is processed, it is final and not cancellable due to the larger nature of these products. Requests for returns/exchanges after the item has been delivered will be evaluated on a case by case basis. Any return request is subject to an administrative and cancellation fee equal to 10% of your order with a minimum of $35.
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