Find your espresso output from the dose and brew ratio.
Usage Tip
Adjust grind so the shot takes about 25–30 seconds at your target yield.
What Is Espresso Yield?
Espresso yield is the weight of liquid espresso in the cup – what comes out, measured in grams on a scale. Paired with your dose (the dry coffee going in), it defines the brew ratio that shapes strength and flavour. The calculator above turns dose and ratio into a target yield, or works backwards from a yield you like.
Brew Ratio Explained
A brew ratio compares dry coffee to liquid out, written dose:yield. 1:2 means 18 g of coffee produces 36 g of espresso – the modern standard. A smaller ratio (1:1) is more concentrated; a larger one (1:3) is longer and more diluted. Weighing both the dose and the yield is what makes espresso repeatable.
| Dose | Ratio | Yield |
|---|---|---|
| 18 g | 1:2 | 36 g |
| 18 g | 1:2.5 | 45 g |
| 20 g | 1:2 | 40 g |
Ristretto vs Espresso vs Lungo
| Style | Ratio | Character |
|---|---|---|
| Ristretto | 1:1 to 1:1.5 | Short, concentrated, syrupy |
| Espresso | 1:2 | Balanced, traditional |
| Lungo | 1:3 | Longer, lighter, more volume |
These are the same shot pulled to different lengths. Ristretto stops early for intensity; lungo runs longer for a milder, larger drink. Most cafes build milk drinks on a 1:2 espresso.
Extraction Basics & Time Guide
Extraction is how much coffee dissolves into the water. Time is a useful gauge alongside the ratio – for a normale shot, aim to hit your target yield in roughly the window below.
| Style | Time |
|---|---|
| Ristretto | 20–25 sec |
| Espresso | 25–35 sec |
| Lungo | 30–40 sec |
Timing usually starts when the pump does. If the shot hits the yield too fast it is under-extracted (sour, weak); too slow and it is over-extracted (bitter, harsh).
Coffee-to-Water Ratio
Espresso ratios are tight (1:1 to 1:3) because it is a concentrated brew. Filter and pour-over coffee use far more water – around 1:15 to 1:17 coffee to water – which is a different calculation entirely. For espresso, think in dose-to-yield by weight, not volume.
Dialing-In Guide
Dialing in means adjusting the grind so a target dose reaches a target yield in a target time. Keep the dose and ratio fixed and change one variable at a time:
| Shot runs… | Adjust |
|---|---|
| Too fast (gushing, under target time) | Grind finer |
| Too slow (dripping, over time) | Grind coarser |
| Sour / thin | Under-extracted – grind finer or raise ratio slightly |
| Bitter / dry | Over-extracted – grind coarser or shorten the shot |
Troubleshooting & Channeling
Grind-Size Troubleshooting
Grind is the main lever for shot speed. Finer slows the flow and raises extraction; coarser speeds it up and lowers extraction. Make small steps and re-pull.
Channeling
Channeling is when water blasts through cracks or weak spots in the puck instead of flowing evenly, giving a fast, uneven, often sour shot. It is caused by poor distribution or an uneven tamp. Fix it with even grounds distribution (WDT), a level tamp, and consistent prep – not by grinding finer.
Extraction Adjustment
To raise extraction: grind finer, increase yield (longer ratio), or raise temperature. To lower it: grind coarser, shorten the shot, or drop temperature. Move in small increments and taste between changes.
Common Espresso Mistakes
| Mistake | Fix |
|---|---|
| Not weighing the shot | Put a scale under the cup – yield by eye is unreliable. |
| Changing several things at once | Adjust one variable, re-pull, taste. |
| Chasing time, ignoring taste | Time is a guide; flavour is the goal. |
| Stale or too-fresh beans | Rest beans ~7–14 days after roast. |
| Uneven puck prep | Distribute and tamp level to avoid channeling. |
Frequently Asked Questions
What is a good espresso brew ratio?
1:2 is the modern standard – 18 g in, 36 g out. Go shorter (1:1–1:1.5) for a ristretto or longer (1:3) for a lungo. Enter your dose above to see the target yield.
How much espresso does 18 g of coffee make?
About 36 g at a 1:2 ratio, or 45 g at 1:2.5. The calculator works it out for any dose and ratio.
What is the difference between ristretto, espresso and lungo?
They are the same shot pulled to different lengths: ristretto is short and concentrated (1:1–1:1.5), espresso is balanced (1:2), and lungo is long and lighter (1:3).
Should I measure espresso by weight or volume?
By weight. Crema makes volume unreliable, so baristas weigh the yield in grams on a scale for consistency.
My shot is sour – what do I change?
Sour usually means under-extracted: grind finer, or extend the ratio a little. Bitter means over-extracted: grind coarser or shorten the shot.
Printable Espresso Ratio Chart
The charts above print cleanly – use your browser print command. Navigation and related-link buttons are hidden automatically.