How Many Bars of Pressure Do You Need for Espresso?

Aiming for about 9 bars at the coffee bed is a useful starting point. This is the pressure associated with espresso extraction, rather than a rule that every machine's label must say exactly 9 bars.

A pump rating can describe the pressure the pump is capable of producing. The brewing system, basket, and water flow affect what happens during extraction, so comparing pump numbers alone can be misleading.

For a first home machine, treat 9 bars as a reference point, not a guarantee of taste. The grind, dose, tamp, and shot time still need to work together.

What does a 9 bar espresso target mean?

The 9 bar figure refers to pressure during extraction through the coffee bed. It gives you a familiar reference when comparing machine designs and recipes.

Pressure is only one part of brewing. Water also needs to pass through coffee grounds at a pace that produces a balanced shot, which is why grind size and dose matter.

If you're new to espresso, start with the basics in our guide to espresso machines for beginners. It explains what to consider as you choose a machine and learn the process.

Why do some machines say 15 or 20 bars?

A higher advertised number can describe pump capability, not the pressure used at the coffee bed. It doesn't mean the machine necessarily brews espresso at that full rating.

For example, the De'Longhi Stilosa has a listed 15 bar output pressure, while the CASABREWS CM5418 has a listed 20 bar output pressure. Those figures alone don't show what pressure reaches the coffee during a particular shot.

The CASABREWS CM5418 is described with a 20 bar pump and a built-in pressure gauge. Its product description also says it achieves optimal 9 bar extraction, so consider the stated extraction target alongside the pump number.

The Stilosa is described as using a 15 bar pump to extract espresso according to brewing standards. Read a higher pump figure as a capability claim, not proof that more pressure produces a better cup.

Is higher pressure better for espresso?

No, a higher bar number alone doesn't mean better espresso. A machine's pressure rating doesn't replace control over the coffee dose, grind, and water flow.

A fine grind can slow water down, while a coarser grind can let it pass more quickly. If the shot runs too fast or tastes unbalanced, pressure may not be the first thing to change.

Use a repeatable recipe and adjust one factor at a time. Our guide on how to dial in espresso on a home machine walks through the process.

How do grind and tamp affect espresso pressure?

Grind and tamp affect how easily water moves through the coffee bed. A consistent tamp helps create an even surface, while grind size gives you a practical way to change flow.

You don't need to press as hard as possible when tamping. Aim for a level, consistent puck, then use shot time and taste to decide whether the grind needs adjustment.

For more detail, see how to tamp espresso and what grind size is right for espresso. Both steps can influence extraction without changing the machine's pump rating.

Does a pressure gauge tell you the brewing pressure?

A gauge can show pressure feedback, but check what it measures and when. Its reading may help you see how the machine responds as you change grind or flow, but it doesn't answer every question about pressure at the coffee bed.

CASABREWS describes the CM5418 gauge as showing pressure to help you make adjustments. That can be useful feedback, but your recipe and the taste of the shot still matter.

The Gaggia Classic Evo Pro is described as making 9 bar espresso extractions. If you want a machine whose stated extraction pressure matches the common target, that detail is more directly relevant than a higher pump number.

The Gaggia also has a commercial-style 58 mm portafilter, commercial single and double shot baskets, and a pressurized basket for pre-ground coffee or ESE pods. Those features give you options as your espresso routine changes.

What should beginners look for in a pressure rating?

Look for a clear description of extraction pressure, then judge the machine by the controls and workflow that suit you. Don't choose only by the biggest bar number on the box.

The Breville Bambino is described with low pressure pre-infusion that gradually increases pressure at the start of extraction. It also has digital temperature regulation, so pressure is one of several extraction features to consider.

If you want to learn with a semi-automatic machine, the Bambino's description highlights pre-infusion and temperature control. Those are concrete details to compare alongside pressure claims.

A beginner may also benefit from a pressurized basket, especially when using pre-ground coffee. Learn the difference in our guide to pressurized vs. non-pressurized espresso baskets.

How does pressure relate to shot time?

Pressure and shot time work together, but neither gives the whole recipe on its own. A shot that runs unusually fast or slow can point to a grind or dose adjustment.

The Breville Bambino's description says low pressure pre-infusion gradually increases pressure at the start. That feature changes how extraction begins, but it doesn't remove the need to dial in the coffee.

Use the shot's flow and taste as practical feedback. For a timing starting point, read how long an espresso shot should take, then adjust to the coffee and basket you're using.

Which machine pressure details are useful to compare?

Compare what each pressure number refers to, plus the machine features that help you control a shot. An extraction target, pump rating, and gauge aren't interchangeable details.

Gaggia Classic Evo Pro (E24): described with 9 bar espresso extractions, a 58 mm commercial portafilter, and a commercial steam wand.
Breville Bambino BES450: described with low pressure pre-infusion and digital temperature regulation.
CASABREWS CM5418: described with a 20 bar pump and a built-in pressure gauge, plus a 9 bar extraction target.
De'Longhi Stilosa: described with a 15 bar pump for espresso extraction.

These details can help narrow the choice, but they don't predict exactly how a shot will taste. You still need a suitable grind, dose, and tamp.

How many bars should an espresso machine have?

Use about 9 bars at the coffee bed as a practical reference for espresso. A higher advertised pump rating isn't automatically better, because it may describe pump capability rather than brewing pressure.

If you're choosing a machine, look for a clear explanation of its extraction pressure and useful controls. Then focus on consistent coffee prep: dial in the grind, tamp level, and adjust based on shot flow and taste.

Frequently asked questions

How many bars should an espresso machine have?

Around 9 bars at the coffee bed is a common espresso extraction target. A machine may advertise a higher pump pressure, but that figure alone doesn't show the pressure reaching the coffee during a shot.

Look for clear pressure information and focus on grind, dose, tamp, and flow when dialing in.

Is 15 bar too much pressure for espresso?

A 15 bar pump rating doesn't automatically mean a shot is brewed at 15 bars. Pump ratings and pressure at the coffee bed describe different points in the system, so check what the number refers to and how the machine controls extraction.

Is 20 bar better than 9 bar for espresso?

No, a 20 bar rating by itself doesn't make a machine better than one designed around a 9 bar extraction target. The rating may describe pump capability, while grind, basket, dose, and water flow also shape the shot.

Does pressure alone make good espresso?

No. Pressure is one part of extraction, alongside grind size, coffee dose, tamping, water temperature, and shot time.

If a shot tastes sour or bitter, adjust the recipe and grind before assuming the machine needs a different pressure rating.

How Many Bars of Pressure Do You Need for Espresso?