Hario Polaris Pour-Over Coffee Scale, White

The Hario Polaris is a pour-over coffee scale that automatically calculates brewing ratios and shows your pouring progress as a percentage. This white model tracks the water you add in real time, helping you follow a recipe without doing the math in your head while you pour.

If you're new to brewing with a scale, I'd start here: weighing your coffee and water gives you something you can repeat. When a cup tastes right, you have a recipe to come back to. When it doesn't, you can change one thing instead of guessing at everything.

What does a coffee-to-water ratio mean?

A brewing ratio describes how much water you use for a given amount of coffee. For example, a 1:16 ratio means 16 g of water for every 1 g of coffee. With 20 g of coffee, that would mean 320 g of water. That's an example to explain the math, not a rule for every coffee.

The Polaris handles ratio calculations automatically. I like that this takes a bit of mental work out of pour-over, so you can pay attention to where and how you're pouring.

See your pouring progress

The percentage display gives you another way to follow the water going into your brew. Rather than relying only on a running weight, you can see your progress toward the target amount as you pour. It's a useful way to make the numbers feel more practical when you're learning a recipe.

Who I'd recommend it for

I'd point you toward the Polaris if you make pour-over and want help keeping your coffee and water proportions consistent. It won't choose the right recipe for your beans, but it gives you clearer measurements to work with as you figure out what you enjoy.

Size and specifications

• Color: white
• Automatic brewing-ratio calculations
• Percentage display with real-time tracking of added water
• Weighing range: 0.1–2000 g
• Dimensions: W 5 × D 6.50 × H 1.06 in.
• Weight: approximately 437 g, including the individual box
• Made in China

Materials

• Body: ABS resin and acrylic resin
• Non-slip components: silicone rubber

My approach would be to keep the coffee dose and ratio steady for a few brews, then adjust from there. The goal isn't to make your morning coffee complicated. It's to make a good cup easier to repeat.