Espresso Dose and Yield Explained

By Coffee Ratio Calculator Guru · Updated January 2025 · 5 min read

Understanding espresso dose and yield is the foundation of consistent espresso. Dose is the weight of dry coffee in the portafilter; yield is the weight of liquid espresso in the cup. Use our espresso ratio calculator to calculate your target yield from any dose and ratio.

Dose: The Input

Dose is the weight of dry, ground coffee you pack into the espresso basket — typically 7–9g for a single and 16–22g for a double. The dose sets the foundation of everything: it determines how much coffee surface area is available for extraction, how much resistance the puck presents to water flow, and the upper limit of how much flavour can be dissolved into the shot. Most modern specialty cafés use 18–20g for a double. Changing dose without adjusting everything else shifts your shot time, yield, and concentration simultaneously, which is why dose is locked in before dialling in grind size.

Yield: The Output

Yield is the weight of liquid espresso that ends up in the cup. You measure it by placing the cup on a scale, taring to zero, and watching the weight accumulate as the shot pours. For a standard 1:2 ratio with an 18g dose, the target yield is 36g. This is why espresso ratios are expressed as dose:yield rather than coffee:water — the water used includes what the grounds absorb, so measuring liquid output (yield) is more precise than measuring water input.

Why Ratio Matters More Than Time

Conventional wisdom says a good espresso shot takes 25–35 seconds. This is true as a rough guide, but the underlying target is the ratio. A properly dialled 1:2 shot at 25 seconds and one at 35 seconds will taste different — but both can be excellent if the ratio is correct and the grind was adjusted to achieve the right extraction in that time. Time is a consequence of grind size; ratio is what you set. Use time as a diagnostic (too fast = too coarse; too slow = too fine), but stop the shot by yield weight, not by the clock.