Nine Bar Basics

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Moka pot or AeroPress vs an espresso machine

Updated

A Moka pot and an AeroPress both make strong, short coffee, but neither makes espresso by the usual 9 bar definition. Bialetti puts the Moka at about 1.5 bar. AeroPress says plainly that if you define espresso by 9 bar, its brewers do not make it. If you drink mostly milk drinks and want a low-cost, small setup, either one may be enough. If you want real crema, a syrupy shot or steamed milk, you need a machine.

Notice what is missing from that chart: the 15 and 20 bar figures from machine listings. Those are pump ratings. See 20 bar vs 9 bar.

Side by side

Moka potAeroPressEspresso machine
PressureAbout 1.5 bar, from steamYour hand on a plungerAbout 9 bar, from a pump
In the cupStrong, heavy coffeeClean, strong coffeeThick shot with crema
GrindCoarser than espresso, per BialettiFlexibleVery fine, adjusted in small steps
MilkNeeds a separate frotherNeeds a separate frotherSteam wand built in
Counter spaceNone, it lives on the stoveNone, it lives in a drawer5.47 inches wide and up

Stay with the small brewer if

Move to a machine if

Machines that make the jump easy

Work out what a machine would save you with the cost calculator, then compare all five on the roundup. A Moka pot is a pressure vessel on a hot stove. Follow its maker's instructions and never block the safety valve.

Sources

We opened these pages on September 18, 2026.