Recipe Halver Formula

Understand the math behind the recipe halver. Each variable explained with a worked example.

Use the Recipe Halver

Formulas Used

New Amount

new_amount = original_amount / divisor

If Cups, Tablespoons Equivalent

tbsp_equiv = (original_amount / divisor) * 16

If Cups, Teaspoons Equivalent

tsp_equiv = (original_amount / divisor) * 48

Variables

VariableDescriptionDefault
original_amountOriginal Amount1
divisorDivide By2

How It Works

How to Halve a Recipe

Formula

New Amount = Original Amount / Divisor

Halving Tricky Measurements

  • Half of 3/4 cup = 6 tablespoons
  • Half of 1/3 cup = 2 tbsp + 2 tsp
  • Half of 1 egg: whisk the egg, weigh it, use half the weight
  • Half of 1 tbsp = 1.5 tsp

    • Worked Example

    Halve a recipe that calls for 1 cup of an ingredient.

    original_amount = 1divisor = 2
    1. 01Divide by 2: 1 / 2 = 0.5 cups.
    2. 02In tablespoons: 0.5 x 16 = 8 tablespoons.
    3. 03Half a cup equals 8 tablespoons.

    Frequently Asked Questions

    How do I halve an egg?

    Whisk the egg, then measure by weight or volume and use half. One large egg is about 50 g (without shell), so use 25 g.

    Should I halve leavening agents exactly?

    For halving, scale leavening agents exactly. The non-linear scaling issue mainly applies when multiplying recipes above 2x.

    Does oven temperature change?

    No, keep the same temperature. Reduce baking time since the smaller quantity will cook faster. Start checking 5-10 minutes early.

    Learn More

    Guide

    Recipe Scaling Guide - How to Double, Halve, or Adjust Any Recipe

    Learn how to scale recipes up or down accurately. Covers multiplying ingredients, adjusting cooking times and temperatures, and avoiding common scaling mistakes.

    Ready to run the numbers?

    Open Recipe Halver