∑ Zetta Calculators

Blog — Cooking

Guides, worked examples and explainers.

Cooking

Recipe Yield Math: How to Calculate Servings and Plan Meal Prep

Knowing the per-serving size of any recipe lets you portion meals, count calories, and feed exactly the right number of people.

May 5, 2026 Cooking

How to Use a Convection Oven: Adjustments That Actually Matter

Convection ovens cook differently from conventional. Here are the adjustments — temperature, time, and recipe types — that actually make a difference.

May 4, 2026 Cooking

Oven Temperature Conversions: F, C, and the Confusing Gas Mark

Recipes from different countries use different oven scales. Here is how to convert between Fahrenheit, Celsius, and British Gas Mark.

May 3, 2026 Cooking

How to Scale Any Recipe Up or Down Without Ruining It

Doubling a recipe is not always as simple as multiplying by two. Here is what to scale linearly, what to adjust, and what to leave alone.

May 2, 2026 Cooking

How Many Sticks of Butter in a Cup? The Definitive U.S. Guide

A simple question with one specific answer for U.S. butter — and a different answer for European. Here is the conversion table.

Apr 30, 2026 Cooking

How Big Is a Cup, Really? American vs International Cup Sizes

A "cup" is not a universal measurement. American, British, Australian, and Japanese cups all hold different volumes.

Apr 29, 2026 Cooking

How to Convert Between Cake Pan Sizes Without Wrecking the Bake

A 9-inch round and a 9×13 rectangular look similar but hold very different amounts. Here is how to convert any cake recipe to a different pan.

Apr 28, 2026