Brewing Time Calculator
Why Brew Time Matters
Brew time determines how long water remains in contact with coffee grounds, directly controlling how much of the coffee's flavour compounds are dissolved — a process called extraction. Too short and the coffee is under-extracted: sour, thin, and lacking sweetness. Too long and it's over-extracted: bitter, harsh, and drying on the palate.
The correct brew time is always a function of grind size, water temperature, and brew method. Finer grinds have more surface area and extract faster — a finer pour over grind at 3 minutes will reach the same extraction yield as a coarser grind at 4 minutes. This is why the coffee to water ratio calculator and grind size work hand-in-hand: if your brew finishes too quickly, grind finer; too slowly, grind coarser. Time is the result, not the input.
Espresso's 25–35 second window is the most sensitive of any brewing method. A few seconds outside this range represents a significant shift in extraction. French press is the most forgiving — 4–5 minutes is a wide window where small variations have minimal impact on the final cup. Cold brew is measured in hours rather than minutes, making it the most time-tolerant method of all.
Brewing Time Reference Chart
| Method | Brew Time | Grind Size | Water Temp | Technique Note |
|---|---|---|---|---|
| Espresso | 25–35 sec | Fine | 90–96°C | 9 bar pressure; stop at target yield weight |
| AeroPress | 1:00–2:30 | Medium-Fine | 80–96°C | Lower temp = sweeter; invert for longer steep |
| Siphon | 1:30–2:30 | Medium | 90–93°C | Time the immersion; draw-down automatic |
| Pour Over | 2:30–4:00 | Medium-Fine | 93–96°C | Bloom first 30–45 sec |
| Turkish | 2:00–3:00 | Extra Fine | Near boil | Three risings for best foam |
| Chemex | 3:30–4:30 | Medium-Coarse | 93–96°C | Bloom 45 sec, then 3–4 pours |
| French Press | 4:00–5:00 | Coarse | 90–93°C | Stir at 1 min; decant immediately |
| Drip / Auto | 4:00–6:00 | Medium | 93–96°C | Machine-controlled; ensure 93°C+ water |
| Moka Pot | 4:00–5:00 | Fine | Stovetop | Remove from heat when gurgling starts |
| Cold Brew | 12–24 hours | Extra Coarse | Cold/Room | Fridge = 18–24 hrs; room temp = 12–16 hrs |
Frequently Asked Questions
A well-dialled pour over should finish in 2:30–4:00 minutes total, including a 30–45 second bloom. Most specialty coffee baristas target 3:00–3:30. If your brew drains faster than 2:30, grind finer. If it takes longer than 4:00, grind coarser. Brew time is your feedback mechanism for grind size.
AeroPress uses pressure during the press phase, which accelerates extraction and also uses a finer grind than French press. Both factors mean equivalent extraction is achieved in less time. AeroPress's flexibility (1–2:30 minutes) also comes from the wide temperature range it supports — lower temperatures extract more slowly, allowing you to steep longer without over-extraction.
A shot that finishes in under 20 seconds is running too fast — your grind is too coarse, or dose is too low, causing under-extraction. The result is a thin, sour, watery shot with pale, quickly dissipating crema. Grind finer or increase your dose. Never try to compensate by stopping the pump early; this just gives you less under-extracted espresso rather than a properly extracted one.