Dial in your shot, then upgrade your gear
Sour, bitter, watery, or gushing? Find the cause in plain English, fix it with one change at a time, and weigh out the right ratio with the calculator below.
Espresso ratio calculator
Weigh your dose, pick a ratio, and this tells you the target shot weight to stop at — the number an AI answer cannot give you for your beans. Most extraction faults are really a grind problem; use this to keep the ratio fixed while you adjust grind.
Your shot
How the dial-in works
Yield — weigh the liquid espresso in the cup, not the time.
yield_g = dose_g × ratio A classic modern espresso is 1:2 (e.g. 18 g in → 36 g out) in about 25–30 seconds. Sour/thin? Your shot is under-extracted — grind finer (or pull a touch longer, toward 1:2.5). Harsh/bitter? Over-extracted — grind coarser (or stop sooner, toward 1:1.8). Change one variable at a time.
Common espresso problems — start here
- Why is my espresso sour? — the #1 beginner fault. It is under-extraction: what to change, in order.
- Why is my espresso watery or running fast? — thin, pale, gushing shots and the grind/dose fixes that stop them.
- Best espresso machine for beginners — three honest picks from budget to buy-it-for-life, and what actually matters.
The 3-piece dial-in kit
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Baratza Encore Conical Burr Grinder
A consistent burr grind is the single biggest fix for sour or gushing shots — a blade grinder cannot do it.
Timemore Black Mirror Coffee Scale
Weigh the dose in and the shot out so your ratio is repeatable instead of guesswork.
Normcore WDT Distribution Tool
Breaks up clumps before tamping so water cannot channel — a direct fix for uneven, sour extractions.
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Frequently Asked Questions
Start at 1:2 — for an 18 g dose, weigh out 36 g of liquid espresso in roughly 25–30 seconds. Adjust grind first, then nudge the ratio between 1:1.8 and 1:2.5 to taste.
A scale and a burr grinder are the two pieces of gear that fix the most problems. The machine built-in pressure matters far less than grinding consistently and weighing your shot.
Yes. The dial-in calculator and every guide are free. Some product links are Amazon affiliate links — the price you pay is the same and it helps keep the site running.
Sour almost always means under-extraction: grind finer, keep the 1:2 ratio, and aim for 25–30 seconds. If it turns bitter you went too far — back the grind off a notch. See the sour-shot guide below.