Free Coffee Brew Timer — Pour Over, French Press, Espresso, Cold Brew

Coffee Brewing Time Chart

Each method below has its own ideal brew ratio (coffee-to-water) and contact time. The ratios reflect the SCA Golden Cup standard, refined by recipes from James Hoffmann's YouTube channel and his book The World Atlas of Coffee.

The Science of Coffee Extraction

Brewing coffee is a controlled extraction: hot water dissolves soluble compounds from ground coffee in a predictable order. The first compounds to extract are acids and fruity esters — the brightness and citrus notes. Next come the caramelized sugars and Maillard products that give body and sweetness. Last come the bitter compounds, particularly chlorogenic acid lactones and trigonelline degradation products. A perfect brew stops mid-curve, after the sweetness has been pulled out but before the bitterness takes over.

The Specialty Coffee Association formalized this in the Golden Cup standard: 18–22% extraction yield (the percentage of soluble mass dissolved from the coffee) at 1.15–1.35% TDS (total dissolved solids in the final cup). Below 18% extraction, the brew is under-extracted: sour, thin, salty. Above 22%, it is over-extracted: bitter, hollow, astringent. Time, grind size, and water temperature are the three levers that control where you land on that curve.

This framework is rigorously documented in Scott Rao's The Professional Barista's Handbook and updated in his Coffee Brewing Handbook, which together remain the standard references for commercial extraction theory. The cafe-driven refinement of these recipes is captured in James Hoffmann's The World Atlas of Coffee, and the broader food-science underpinnings appear in Harold McGee's On Food and Cooking.

Method-by-Method Brew Notes

Pour Over (V60, Origami, Kalita Wave)

Hoffmann's "best V60 technique" recipe pours 50 g of bloom water on 15 g of grounds, waits 45 seconds, then adds water in two more pulses to reach 250 g total. Total brew time is 3:30. Use 95°C water, a medium grind, and tap the dripper to settle the bed before the final drawdown.

Chemex

The thicker bonded paper filter Chemex uses (20–30% heavier than V60 paper) traps more oils and fines, producing a cleaner, brighter cup but also slowing flow. Grind one notch coarser than for V60. Total brew time runs 4 to 5 minutes for a 6-cup setup.

French Press

The Hoffmann method: 60 g coffee in 1 L of water, coarse grind, stir at 4 minutes to break the crust, skim the floating grounds, then leave it for another 4 to 5 minutes without plunging. Decant carefully without disturbing the sediment. This yields a cleaner cup than the traditional plunge method.

Espresso

The standard double shot pulls 36 g of espresso from 18 g of finely ground coffee in 25 to 30 seconds at 9 bars of pressure (the standard set by Achille Gaggia's 1947 lever machine and codified by every commercial machine since). Water temperature is 92–96°C. The crema layer on top is colloidal CO₂ foam from the high-pressure extraction.

AeroPress

The 2008 Tim Wendelboe recipe is the canonical inverted method: 15 g coffee, 220 g water at 80°C, stir, steep 1:30, then press for 30 seconds. The 2017 World AeroPress Championship winning recipe uses a finer grind and shorter steep. Both produce a clean, low-acid cup.

Cold Brew

The Toddy method (patented 1964) uses a 1:8 coffee-to-water ratio and 12–16 hours at room temperature. The Hario Mizudashi and most home methods steep in the refrigerator for 16 to 24 hours. Cold brew has roughly 67% less acidity than hot-brewed coffee because the cold water does not extract chlorogenic acids efficiently.

Common Coffee Brewing Mistakes

Using Pre-Ground Coffee

Ground coffee loses 60% of its aromatic compounds within 15 minutes of grinding. Buy whole beans and grind immediately before brewing. The difference is more dramatic than any other variable.

Wrong Grind Size for the Method

Espresso needs fine. French press needs coarse. Using one grind for everything produces unbalanced extraction every time. A burr grinder is the single most impactful upgrade for home brewers.

Water Too Hot or Too Cool

Boiling water (212°F) is too hot for direct brewing — it scalds the grounds and accelerates bitter extraction. Target 195–205°F (90–96°C). Below 185°F, extraction stalls and the cup is sour.

Inconsistent Pouring

For pour-over methods, an uneven pour creates channels through the bed where water bypasses the grounds. A gooseneck kettle and a slow, controlled spiral pour solve this. The Hario Buono and Fellow Stagg EKG are the most cited gooseneck kettles in the specialty coffee community.

Skipping the Bloom

Fresh coffee releases CO₂ on contact with water, which physically pushes water away from the grounds. A 30 to 45 second bloom — pouring about 2x the coffee weight in water and waiting — degasses the bed so the main pour extracts evenly.

Caffeine, Safety, and Storage

A 12 oz cup of brewed coffee contains roughly 95–200 mg of caffeine; a double espresso, 60–130 mg; cold brew, 150–250 mg per 12 oz. The FDA identifies 400 mg daily as the upper limit for healthy adults. Pure caffeine powder is dangerous; the FDA has issued repeated consumer warnings against unmeasured caffeine supplements.

Whole-bean coffee is best within 2 to 4 weeks of roast date for peak flavor, though it remains safe to drink for months. Store in an airtight, opaque container at room temperature — not in the refrigerator (humidity damages the beans) and not in the freezer for short-term use (condensation cycles cause flavor loss). Cold brew concentrate keeps in the fridge for 2 weeks; ready-to-drink cold brew, 7 to 10 days.

Coffee Timer FAQ