Overnight Oats Calculator

About this calculator

This calculator scales a classic overnight oats recipe — rolled oats, milk (or a milk alternative), and chia seeds — to any number of servings, starting from the standard base ratio of roughly equal parts oats and milk by volume plus a spoonful of chia per serving. The chia seeds matter for texture as much as nutrition: they absorb roughly ten times their weight in liquid overnight, which is what thickens the mixture from a runny bowl of oats into the classic pudding-like consistency without any cooking.

Home cooks meal-prepping breakfasts for the week and anyone scaling a recipe up for a group brunch use this to avoid the guesswork of resizing ratios by hand, since getting the oats-to-liquid ratio even slightly wrong is the most common reason overnight oats turn out too soupy or too stiff.