Ratio Four Coffee Machine Half-Batch Pour Over • 5 to 20oz • Handblown Glass Carafe • Black or Linen All of the Ratio engineering. None of the counter space. The Four is the smallest machine Ratio builds, and it exists for a specific person: the one who drinks one or two good cups and has no use for a full carafe going cold on the counter. It runs the same bloom cycle and the same wide showerhead as its larger siblings, then puts 5 to 20 ounces into a handblown glass carafe in under four minutes. One button. No menus. No app. Brews 5 to 20oz, enough for one or two cups or a single large travel mug Real bloom cycle that releases CO2 before extraction begins Wide showerhead for even saturation, removable by hand for cleaning Handblown borosilicate glass carafe Removable water tank that sits on the left, the right, or behind the machine Fits anywhere at 11.5" tall and 7.5" wide 5-year manufacturer warranty LACC customers rate us 4.9 out of 5 across 3,000+ verified reviews. Why It's Different A small machine usually means a compromised one. This is the exception. It blooms. Most machines at this size skip the bloom entirely. The Four wets the grounds and pauses so freshly roasted coffee can release its CO2 before the real extraction starts. A wide showerhead. Water is distributed across the whole bed instead of drilling a hole through the middle, which is the difference between even extraction and a sour cup. A tank that moves. Lift the water tank off, fill it at the sink between 5 and 20 ounces, and put it back on the left, right, or rear. If you want precision, set the tank on a scale and fill to your target weight. Swap the basket. The included flat-bottom basket takes Ratio Four filters or most 8 to 12 cup flat-bottom filters. You can also pull it and drop in your own conical or flat-bottom dripper, glass or stainless. One button, on purpose. Like every Ratio machine, the Four is not programmable. You press start. That is the entire interface. Four Or Six? Same engineering philosophy, two different mornings. Ratio Four makes 5 to 20oz into a glass carafe meant to be poured and drunk right away. Buy it if you are brewing for one, or if counter space is the constraint. Ratio Six makes a full 40oz into an insulated thermal carafe that holds temperature for hours, and it carries the SCA Certified Home Brewer mark. Buy it if more than one person drinks coffee in your house. Machine Details Capacity 5 to 20oz per batch Brew Time Under 4 minutes Carafe Handblown borosilicate glass, for immediate serving Filters Ratio Four paper filters or most 8 to 12 cup flat-bottom filters Materials Tritan BPA-free water tank, polypropylene brew basket, borosilicate glass carafe, aluminum heating system, silicone tubing, stainless steel, matte polymer base over a reinforced metal structure Dimensions 10.6" x 7.5" x 11.5" Weight 12 lbs Power 120V, 1200W, 50/60Hz Colors Black, Linen Warranty 5-year manufacturer warranty How To Dial It In Grind: Medium, about the texture of granulated sugar. Ratio: 1:16, roughly 60g of coffee per 1000g of water. Full 20oz batch: About 37g of coffee. Water: Filtered and fresh. Never distilled. Go coarser for a lighter cup, finer for more body. For the full breakdown, read our complete coffee brewing guide. Common Questions How much does it brew? Between 5 and 20 ounces, which is one to two normal cups or one large travel mug. Does it keep the coffee warm? No. The glass carafe is built for pouring and drinking right away. If you want heat retention, brew into a thermal vessel. Is it programmable? No. Every Ratio machine uses a single button. Press it and it brews. What filters does it take? Ratio Four paper filters or most 8 to 12 cup flat-bottom filters. You can also swap the whole basket for your own dripper. How does it ship? The machine ships direct from Ratio. Any coffee you add to the order is air-roasted and shipped from our roastery in Rockwall, Texas. Pair It With Coffee Built For It Every bag we roast scores 85 or higher on the SCA scale, air-roasted on our Loring S35 Kestrel in Rockwall, Texas and shipped whole bean. Shop the fleet 100% disabled veteran-owned. Ten percent of every purchase supports veteran and aviation causes. Never bitter. Always better. Be relentless. 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