Kalita Wave

The Kalita Wave was developed by the Japanese company Kalita and has become one of the most widely used pour-over drippers in specialty coffee, alongside the Hario V60. Where the V60 relies on a single central drainage hole and a conical filter, the Kalita Wave uses a flat bottom with three small drainage holes and a proprietary wave-pattern filter. The geometry is fundamentally different, and so is the way water moves through the bed.

The Flat Bottom Advantage

In a conical dripper like the V60, coffee grounds settle into a cone shape. Water poured onto the centre hits the deepest part of the bed first, then flows outward and down. The flow rate is variable — determined almost entirely by grind size. A slightly wrong grind or uneven pour can produce channelling or bypass around dry grounds.

A flat-bottomed dripper creates a uniform bed of even depth across the entire surface. Water percolates downward through the whole bed rather than preferentially through the centre. The result is more consistent extraction across the coffee mass, and less sensitivity to pouring technique. A beginner using a Kalita Wave will typically produce more consistent results than a beginner using a V60.

The Wave Filter

The wave filter is a key part of the Kalita Wave's design. The pleated, accordion-style sides keep the filter away from the walls of the dripper, preventing suction adhesion that would slow or stop drainage. In a standard flat-bottomed dripper, a wet paper filter pressed against smooth walls creates a seal that prevents water from draining. The wave filter's pleats hold a layer of air between paper and dripper, maintaining free drainage regardless of paper contact.

The flat bottom of the wave filter also creates a stable coffee bed without the bunching or folding that affects some other flat-bottom designs.

Parameters

• Grind: Medium to medium-fine. More forgiving than V60 — the flat bed and multiple drainage holes buffer against grind size errors.
• Ratio: 1:15 to 1:17. Standard pour-over range.
• Brew time: 3:00–4:00 total. The flat bed and three-hole drainage create a slightly slower drawdown than a V60 at the same grind size.
• Water temperature: 90–96°C. Light roasts benefit from the higher end.
• Pours: Two main approaches: a continuous slow pour with gentle agitation, or pulse pouring (multiple smaller pours with rest periods). The flat bed is forgiving of both styles.

Sizes

The Kalita Wave is available in two sizes:

155: Designed for 1–2 cups. Approximately 18–22g of coffee producing 250–350ml.

185: Designed for 2–4 cups. Approximately 25–35g of coffee producing 350–550ml.

The 155 is more popular for single-cup preparation; the 185 for sharing or batch service.

Materials

Kalita produces the Wave in three materials:

Glass: Retains heat well; visually appealing. Fragile.

Stainless steel: Durable, heat-retentive. Popular for travel and commercial use.

Ceramic: Best heat retention; heavy. The premium home choice.

The choice of material mainly affects heat retention during the brew. Pre-heating the dripper with hot water before brewing matters more than the material — a cold ceramic or glass dripper will steal significant heat from the first pour.

Comparison with V60

The V60 and Kalita Wave are the two most common pour-over drippers in specialty coffee. Key differences:

V60: Higher ceiling for experienced brewers. The conical geometry and single hole give maximum control — and maximum consequence for errors. With a great grind and skilled pours, the V60 produces exceptional clarity and brightness.

Kalita Wave: More consistent for casual and intermediate brewers. The flat bed produces a slightly fuller body and softer acidity. Less dramatic at the top end of technique, but far more reliable day-to-day.

Many cafés use the Kalita Wave for service precisely because it tolerates variation in pouring better than the V60.