Quick answer: An espresso shot glass (usually 2–3 oz with 1 and 2 oz lines) is handy for splitting and pouring shots, but espresso is measured by weight. A café bar needs a scale accurate to 0.1 g on each group (or a grind-by-weight grinder plus a yield scale), dosing cups, a few shot glasses, and jiggers or pumps for syrups. Write recipes in grams, train to them, and check them every shift.
Key takeaways
- Weight, not volume. Crema makes volume unreliable.
- 0.1 g scales for dose and yield.
- Shot glasses still help with splitting and pouring.
- Write recipes in grams and post them at the bar.
Why volume misleads
Fresh espresso has a layer of crema, a foam of gases and oils that can make a shot look much larger than the liquid underneath. Two shots that both reach the 2 oz line can have very different amounts of coffee in them. That's why specialty recipes are written by weight: dose in grams of ground coffee, yield in grams of liquid espresso.
Brew ratio in 60 seconds
A brew ratio compares dose to yield. Five Senses Coffee describes 1:2 as a sensible starting point, with shorter ratios tasting more concentrated and longer ratios offering more clarity.
| Style (rough) | Ratio | Example dose → yield |
|---|---|---|
| Ristretto-style | ~1:1–1:1.5 | 18 g → 18–27 g |
| Normale | ~1:2 | 18 g → 36 g |
| Lungo-style | ~1:2.5–1:3 | 18 g → 45–54 g |
Pair the ratio with a target time range from your roaster, and adjust grind to hit it. For the grinder side of the equation, see our commercial espresso grinder guide.
The café measuring kit
| Tool | What it's for | What to look for |
|---|---|---|
| Espresso scale | Weighing yield (and dose) | 0.1 g accuracy, fits the drip tray, water resistant, fast response, built-in timer |
| Dosing cup | Grinding into a cup, then into the portafilter | Fits your basket size, stainless |
| Shot glasses | Splitting shots, pouring into iced drinks | Tempered glass, 2–3 oz, clear markings |
| Jiggers | Measuring syrups or sauces without pumps | Marked ¼, ½ and 1 oz |
| Milk thermometer (optional) | Training steaming temperature | Clip-on, quick read |
| Timer | Shot time | Built into scale or machine |
Shot glass buying tips
- Tempered glass survives heat and the dishwasher better.
- Lined glasses with both 1 and 2 oz marks help with splits and iced drinks.
- Handled or "double" shot pitchers in stainless pour more cleanly into small cups.
- Buy extras. Shot glasses chip and break; keep a spare box.
Setting up the bar for speed
- Scale on every group you use during peak, or a grind-by-weight grinder plus a yield scale.
- Pull into the serving cup on the scale when possible to save a pour.
- Use shot glasses only for drinks that need a separate pour, such as iced drinks or affogatos.
- Post the recipe card by the grinder: dose, yield, time range, and the date it was dialed in.
- Tare habits: tare with the cup in place, then start the shot.
Daily calibration and dial-in
Start each day by pulling and tasting a shot to recipe. Coffee changes as it ages and as the weather changes, so check again mid-day. Check scales with a known weight periodically; a drifting scale throws off every drink.
Cleaning
- Rinse shot glasses and dosing cups between uses; espresso oils build up quickly.
- Wipe scales and keep them dry; don't submerge unless rated waterproof.
- Wash shot glasses in the dishwasher or three-compartment sink like other smallwares.
Choose smallwares made for commercial use; NSF certification covers food equipment design and cleanability, and many health departments look for it.
Other measuring habits worth building
- Syrups by pump count with a posted chart; see our syrup pumps per drink guide.
- Milk by line or weight in each pitcher size; see our latte art pitcher guide.
- Tamping level and consistent; see our tamper size guide.
Stock the bar, then the counter
Affogato Bean helps cafés source smallwares and equipment, and keeps branded cups, lids and sleeves stocked so every carefully measured shot leaves in a cup with your name on it. See products or talk to us.
Frequently asked questions
How many ounces is an espresso shot glass?
Common espresso shot glasses hold about 2 to 3 ounces and often have lines marking 1 and 2 ounces. Because crema adds volume, volume markings are only a rough guide to shot size.
Should espresso be measured by volume or weight?
By weight. Recipes are written as dose (grams of ground coffee) and yield (grams of liquid espresso), so a scale accurate to 0.1 gram is the standard tool.
What is a good espresso brew ratio?
A 1:2 ratio (for example, 18 g in, 36 g out) is a common starting point. Many cafés settle between about 1:1.5 and 1:2.5 depending on the coffee and their taste.
Do cafés still need shot glasses if they use scales?
Shot glasses are still useful for splitting shots, pulling into drinks that need a separate pour, and checking extraction visually. Many cafés pull directly into cups on a scale for speed.
Sources
- Five Senses Coffee, “Brew Ratios in Espresso.”
- NSF, “Food Equipment Certification.”
Sources checked October 2026. Statistics are reported as published by each source.