Barista Milk Steaming Ratio Calculator
Different espresso drinks need different milk-to-foam ratios. Enter your cup size and desired drink style to calculate exactly how much milk to steam and how much foam to aim for.
Milk to Steam
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Liquid Milk (oz)—
Foam (oz)—
Total Milk+Foam Volume (oz)—
About this calculator
Calculate the right milk volume and steaming target for your cup size and foam style, from flat white to cappuccino.
Frequently Asked Questions
Why steam more milk than the final drink volume?
Steaming milk expands its volume with air, and some foam is discarded when pouring, so you steam roughly 10-15% more than what ends up in the cup.
What's the difference between a latte and flat white?
A flat white uses less foam and a higher ratio of steamed milk to espresso, giving it a denser, silkier texture than a latte.
Does milk type affect foam quality?
Yes, whole milk produces creamier, more stable foam due to fat content, while skim milk foams larger but less stable bubbles.