On every recipe card, readers can change the servings with the − and + buttons. Every ingredient amount recalculates and shows as a kitchen-friendly fraction (1 1/2 cups, not 1.5).
The US / Metric switch converts amounts, and the choice is remembered from recipe to recipe. Recipe WP understands common spellings: tsp, tspn, T, Tbsp., cups, lbs, grams and more.
The print page uses whatever servings and units the reader picked.
Tip
Write amounts as you would in a cookbook (1/2, 1 1/2, 2). Amounts written as words (“a handful”) don’t scale, which is usually what you want.