Coffee Science

Pour over coffee ratio: 1:15 (1g coffee per 15g water) for most beans. But the bloom matters more than the ratio — saturate the grounds for 30–45 seconds first, or the rest of the water channels through unevenly and your cup is sour no matter what ratio you use.

The standard French press ratio is 1:15 (1g coffee per 15g water). Use 1:14 for stronger coffee, 1:17 for lighter. Brew time is 4 minutes. Here's the complete guide with gram measurements by cup size.

The standard AeroPress ratio is 1:15 (1g coffee per 15g water). Use 1:13 for stronger concentrate-style brews, 1:17 for lighter, tea-like cups. Brew time is 90 seconds. Here's the complete guide with gram measurements by cup size, standard vs inverted method, and dilution ratios for concentrate recipes.

Cold brew concentrate needs a 1:6 ratio (1 cup coffee to 6 cups water). Ready-to-drink is 1:8. Steep 12–24 hours cold. Here's every ratio, brew time, and how to dilute concentrate correctly.

Compare pour over, French press, cold brew & drip by flavor, cost, time & difficulty. Quick comparison chart inside — find your perfect brewing method in 1 minute.

Sour coffee = under-extracted (grind finer, brew longer, or use hotter water). Bitter coffee = over-extracted (grind coarser, brew shorter, or use cooler water). Here's exactly which variable to adjust.

A daily Starbucks latte costs $2,100–$2,500 per year. The same coffee made at home costs $150–$400. The gap is real — here's the exact math by brew method, and when the expensive equipment pays for itself.