300
ml
40
ml
—
min
279
ml
300
ml
40
ml
—
min
279
ml
Pour over coffee is a manual brewing method in which hot water is poured slowly and deliberately over ground coffee held in a filter, allowing the brewed coffee to drip through into a carafe or cup below. The pour over method gives the brewer exceptional control over every variable — including pour rate, pour pattern, water temperature, and bloom timing — producing a cup renowned for its clarity, brightness, and nuanced flavor expression.
The Pour Over Coffee Calculator calculates the total water needed, the bloom water for the initial pre-infusion phase, the expected brew time, and the estimated yield based on your chosen dripper, coffee dose, ratio, and water temperature.
The four most popular pour over drippers each have distinct characteristics:
Hario V60: A conical dripper with a single large hole and spiral ridges. The V60 rewards skilled pouring technique and produces a clean, bright, and complex cup. Typical ratio: 1:14 to 1:16. Target brew time: 2.5–3 minutes.
Chemex: A thicker paper filter produces a crystal-clear, exceptionally clean cup with very little sediment or oils. The Chemex is forgiving and produces a crisp, tea-like brew. Typical ratio: 1:14 to 1:17. Target brew time: 3.5–4.5 minutes.
Kalita Wave: A flat-bottom dripper with three small holes that produces more even extraction than conical designs. More forgiving than the V60, it produces a balanced, slightly fuller-bodied cup. Typical ratio: 1:13 to 1:16. Target brew time: 3–3.5 minutes.
Bee House / Melitta: A beginner-friendly dripper with two small holes that naturally slows flow rate and produces consistent results with less technique required. Slightly fuller-bodied than V60. Target brew time: 3–4 minutes.
The bloom phase is a 30–45 second pre-infusion step where you pour a small amount of water (typically 2× the coffee weight) over the grounds, allowing CO2 — trapped during roasting and released as fresh coffee degasses — to escape. Blooming with freshly roasted coffee is visually dramatic (the coffee dome swells and bubbles). Blooming improves extraction evenness and reduces sourness in the final cup.
Water temperature significantly affects extraction. The SCA recommends 90–96°C. Light roasts often benefit from higher temperatures (94–96°C) to extract their delicate fruity compounds fully. Dark roasts can be brewed at lower temperatures (88–92°C) to reduce harshness.
Total water is calculated as: Total Water (ml) = Coffee (g) × Ratio. The bloom water portion is set at 2× the coffee weight in grams (e.g., 20g coffee → 40ml bloom water). Target brew time is looked up per dripper type based on specialty coffee best practices. Estimated yield accounts for water absorbed by the coffee grounds (approximately 2g of water per gram of coffee) using: Yield = Total Water × 0.93.
If brew time is shorter than target, your grind is too coarse or pour rate too fast — try a finer grind. If brew time is longer than target, your grind is too fine or pour rate too slow. For the V60, uneven pouring can cause channeling and inconsistent extraction. For the Chemex, ensure the thick filter paper is fully rinsed with hot water before brewing to remove the paper taste and preheat the vessel.
Inputs
Results
15g coffee × 15 ratio = 225ml water. Start with 30ml bloom for 30 seconds, then pour remaining 195ml in 2–3 slow, circular pours. Target total brew time: 2.8 minutes (168 seconds).
Inputs
Results
42g coffee × 16 ratio = 672ml water. Bloom with 84ml for 45 seconds. Pour remaining 588ml in 4–5 slow pours over 3.5 minutes. Final yield ~625ml, enough for 2–3 generous cups.
Most pour over methods work well at 1:15 (66.7g coffee per liter of water). The SCA standard is 55–65g per liter. Lighter, fruitier coffees often taste better at 1:14 to 1:15; delicate coffees shine at 1:16 to 1:17.
Yes — always rinse paper filters with hot water before brewing. This removes the papery taste from the filter, preheats the dripper and vessel, and ensures the filter sits flush against the dripper walls. Discard the rinse water before adding coffee.
A medium grind — similar to rough beach sand — is the standard for V60 and Kalita. The Chemex uses a slightly coarser grind due to its thicker filters. Adjust grind size if brew time deviates significantly from the target.
Use circular pouring motions from the center outward to wet all grounds evenly. Avoid pouring directly on the filter walls. Gentle Gooseneck kettle control is essential — a standard kettle makes precise pour rate control very difficult.
A gooseneck kettle has a long, curved spout that gives you precise control over the direction and flow rate of water. This control is essential for pour over because uneven pouring leads to channeling and inconsistent extraction. Electric gooseneck kettles with temperature control are the gold standard.
The V60 has thinner filters and a larger opening, producing a faster brew with slightly more body and oils. The Chemex uses much thicker proprietary filters that remove almost all oils and fine particles, producing an exceptionally clean, tea-like cup. The Chemex is also more forgiving for beginners.
Yes, but the quality will be noticeably lower than freshly ground coffee. Pre-ground coffee is typically ground at medium for drip makers — acceptable for pour over but not optimal. Freshly ground coffee of the right coarseness for your dripper will produce a significantly better cup.
Typical pour over recipes use 3–5 pours after the bloom. The bloom is the first pour. Subsequent pours are done in slow, circular motions, often in equal intervals. More pours generally mean more control and more even extraction.
Sourness is a sign of under-extraction. Common causes: grind too coarse, water temperature too low, or brewing too quickly. Try grinding finer, increasing water temperature by 2–3°C, or slowing your pour rate to extend contact time.
Neither is objectively better — they produce different cups. The Kalita Wave's flat bottom produces more even saturation and a more forgiving brew, with slightly more body. The V60 rewards skilled technique with exceptional brightness and complexity. Choose based on your preference and skill level.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
How helpful was this calculator?
Be the first to rate!
Coffee to Water Ratio Calculator
Coffee & Tea Calculators
Cold Brew Ratio Calculator
Coffee & Tea Calculators
Coffee Grind Size Calculator
Coffee & Tea Calculators
Coffee Brew Time Calculator
Coffee & Tea Calculators
Espresso Extraction Calculator
Coffee & Tea Calculators
French Press Coffee Calculator
Coffee & Tea Calculators
