Exact conversion versus recipe estimate
One US fluid ounce is approximately 29.5735 milliliters. That relationship is a unit conversion. The suggested cold foam quantity is different: the volume converter uses 3.75 ml of milk base per ounce of drink, derived from the 60 ml reference serving.
A 16 ounce cup therefore converts to about 473 ml of total cup capacity, while the suggested topping base is 60 ml. Do not confuse those two outputs.
Common drink sizes
The calculator suggests 45 ml for a 12 ounce drink, 60 ml for a 16 ounce drink and 90 ml for a 24 ounce drink. Ice level, glass shape and how thick you want the topping can justify using less or more.
If a drink already contains milk, a smaller topping may feel balanced. A strong cold brew may support a thicker layer. Your glass and drink still decide whether the suggested amount feels right.
Scaling a batch
Doubling the ingredients is straightforward, but doubling the mixing time is usually not. A larger batch changes liquid depth and circulation. Start with the ingredient multiplier, use an appropriately sized container and evaluate texture before extending the timer.
For predictable results, make two normal batches instead of one very large batch when your tool is designed for single servings.
Teaspoons and milliliters
The calculator presents flavor in teaspoons because syrup is commonly measured that way at home. A US teaspoon is about 4.93 ml, often rounded to 5 ml for kitchen use. Syrup viscosity can make a casual spoon measurement less precise.
When repeatability matters, measure liquid flavoring by weight or use the same measuring spoon each time.
QUICK ANSWERS
Frequently asked questions
How much cold foam base goes on a 12 oz drink?
Start with 45 ml, then adjust for your glass shape and preferred topping depth.
Can I double every number for two drinks?
You can double ingredients, but do not automatically double mixing time.
Why is cup capacity much larger than the suggested foam amount?
Cup capacity describes the whole drink; the formula output describes only the topping base.
Build a recipe for your cup.
Choose a cup size, milk and sweetness to get the amounts and first texture cue.